One day, a young person with white hair and red eyes hears a mysterious voice beckoning them, discovering a cave full of monsters just north of the town of Holm. They form a party of searchers and discover that the depths hold an ancient ruin, but soon after making some headway in their exploration, a horde of monsters surge out of the ruins, revealing themselves to be demons known as "Nightseed" and attack the town. Although they fend off the Nightseed, several children suddenly fall prey to an unknown disease that causes them to fall into a slumber they cannot be awoken from. Worse yet, the Nightseed continue to attack the surrounding area, destroying nearby villages in the process and spreading chaos to the rest of the land. The cause of these attacks must be in the ruins, so it falls on the adventurers to continue their quest and solve the mystery of the forgotten ruins.
The game can be described as a JRPG acting as a TRPG—a majority of the game is spent on exploring the ruins (and later the land on the surface) by investigating nodes, where in addition to hand-drawn maps and CGs, Second-Person Narration will pop up to describe the surroundings in deep, eloquent detail the same way a Game Master paints pictures with their words. Gameplay follows a loop: in addition to the Protagonist, the player can pick a maximum of two party members to accompany them—and they cannot undo this decision until the player ends the day (barring Save Scumming), making forethought important—and head into the ruins. Exploration is based around selecting nodes and seeing the map unfold from them, understand the immediate situation given by the narrator, and select an option as a response and/or fight in Turn-Based Combat, where victory can be swiftly decided through preparation, tactics, and exploiting weaknesses. Notably, levelling up Character Levels requires Experience Points, but because of the game's emphasis on exploration, you would earn more from clearing nodes and living through events than fighting random monsters (unless you're after loot). This is encouraged by the TTEXP (This Time EXP) system, which rewards you SP needed to level up the Protagonist's Job System by gathering EXP and hitting thresholds, rewarding the player for doing as much as they can in a single run but at the risk of exhausting themselves in the process.
A remake was announced at TGS 2022, the concept trailer for which can be seen here
. Later at TGS 2025, released footage of the demo can be watched here.
Download here.
Has no relation to Library of Ruina.
This game contains examples of:
- 11th-Hour Ranger: In the final dungeon, if the Protagonist is a Rogue, Titus I possesses Chuna's body and fights the party until her body is mortally wounded. If the party only contains three people and the player has the Iterio Fragment, Chuna will be revived and will join as the fourth member.
- 11th-Hour Superpower: During the final battle, Overlord!Titus will cast a spell that drains the party's MP while reducing their stats and accuracy. However, the Iterio Fragment skill can be used to reverse that spell and regenerate MP each turn, allowing the party to spam their best skills.
- Adam Smith Hates Your Guts: Justified with items obtained directly or indirectly from agriculture. After the Grotto dungeon, the price of food and healing items increases due to the monster attacks on farmers. The prices increase again after the party returns from the Ancient City, due to time passing quicker in the real world. Downplayed with equipment and adventuring supplies, which are sold at fixed prices, though new high-end equipment tends to be priced several times higher than their slightly weaker predecessors.
- Ambiguous Start of Darkness:
- The Witch of Varamere was stated in one legend to have been betrayed by Titus I, making it seem like she was forced to become a demon lord. However, the River Girl legend states that she used a love potion to seduce Titus, making it seem like she was the one who corrupted him in the first place. It's not clear which legends in the game are true, making her morality before becoming a demon lord ambiguous.
- For that matter, did Titus I turn evil because of the princess's love potion or did he succumb to his ambition and power of his own volition? Due to the conflicting lore, it's not clear what changed him.
- Ambition Is Evil:
- Prince Teor of the Kness Dukedom starts out as an ally, but eventually, it becomes clear that he's exploring the ruins not out of altruism, but to gain power and glory for himself. He eventually decides to rebuild the Archean Empire with himself as the ruler and plans to trap everyone in Star Spirits in order to preserve Titus's spirit.
- In the final dungeon, if the player asks Titus I how he can justify his actions, he states that it's human nature to seek power and immortality. His goal is to force everyone on the planet to dream of him and his empire so that he can preserve himself and his legacy forever.
- Anti-Grinding: EXP from individual battles are far lower than event EXP. Additionally, the encounter rate for an area goes down if the player kills too many mobs.
- Arbitrary Headcount Limit: Your team at any given time can only count up to three heads, the Protagonist included, so in practice you can only ever take two other party members along for a dive.
- Astral Projection: After obtaining the Book of Keys on the Sage Route, the Protagonist can separate their spirit from their body to fly into the Cosmos, the route's Unique Dungeon. It is through this that they can learn and master the book's techniques.
- Baguette Beatdown: Combining Mysterious Salt with Bread produces a special Dark Cuisine known as Rock-Hard Bread, a one-handed mace with an obvious Manuke attribute. Despite being made with salt used to preserve food, it has a 1% chance to rot after a day passes if it's not equipped by someone.
- Big Bad: The cause of the Nightseed attacks is the spirit of Emperor Titus I, who wants to lure the protagonist deeper into the ruins and force them to prove themselves worthy as his vessel. He intends to use the Star Spirits to force everyone to fall asleep and dream of Argadium, keeping his spirit and empire alive forever.
- Boring, but Practical:
- Salad is a food that can be made with 3 Vegetables, though the cost can be reduced by using only 1 and negating most of the chance of failure by having someone with high cooking skill make it. It'll restore 30% of the eater's max MP outside combat, and between the low Max MP characters start out with and the cheapness of Salads, it's the most efficient MP recovery item you can ever make (as long as one factors in daily food rot).
- Polalapo is a Dark Cuisine made using fish viscera and pickled with fruit or herbs, which is so disgusting that it shocks fallen party members back on their feet with 1 HP. It's the cheapest revival food to make despite the lackluster healing by costing only one Fish and one Fruit, and is best made by Fran and Melodarke to intentionally fail the cooking (Supreme Chefs Allson and Kileha would have needed more tries to fail).
- The Iterio Fragment is the completed form of the four cursed elemental gems and the non-cursed Yunum's Moonstone, but the Iterio Fragment and Yunum's Moonstone don't have any stat boosts. They're still mostly preferable to their cursed counterparts because they have no side effects, have instant death immunity, retains the halved MP cost trait amongst other benefits, and cannot be used by Titus I against the Protagonist.
- Cap:
- The inventory can only contain 10 of each consumable item. This is actually a soft cap due to the underlying engine, with the hard cap at 99. That's relevant here because it's possible to obtain more than 10 of an item if the player farms them from events that don't check the soft cap.
- Damage dealt can only ever reach up to 999, though you'd need highly specific strategies just to do this.
- You can only have up to five levels in each Title.
- Can't Drop the Hero: Your Player Character can never be benched like any of their fellow party members, with everything in the game taking place from their point of view alone.
- Connected All Along: If Kileha is brought along to the Giant Tower Temple, she will comment that the place reminds her of those built by a people called the Tasiri, contrasting Theresia, the resident archaeologist, having no knowledge of the temple. Datta and his hermits (as well as the other ascetics) are also heavily implied to have come from Mardilia, given the former's preference for spicy food being the same as Kileha's, and Kileha bearing great resemblance to his former wife.
- Corrupt Corporate Executive: Pingar is the greedy CEO of Pingar's Emporium. On the rogue route, he pressures the protagonist and Paris into selling treasure to him while making empty promises of saving their friend, Chuna. He later manipulates the duo into attempting to assassinate Duke Kamur and sics another assassin on them when they refuse to hand Chuna over to him. He then kidnaps Chuna and several other crystallized children to sell them to Teor, knowing the latter is going to perform dangerous experiments on them and keep them in their crystallized state.
- Crippling Overspecialization: The Title system gives the user both stat penalties and stat bonuses depending on which Title they level up. This means a Protagonist who only masters Titles they have aptitude for will likely have very high primary stats and very low Dump Stats.
- Cursed Item: Combined with Stuck Items. Some powerful pieces of equipment are cursed so that if the player tries to remove them from the wearer, an event is triggered after the player exits the menu, which causes the equipment to go back on the previous wearer. While Ada can remove most cursed equipment by destroying them, she cannot do so for the elemental gems that only the protagonist can equip. Those require the player to activate the fountain at the bottom of the Cemetery.
- Demonic Possession: The spirit of Titus I intends to take over the protagonist's body after the latter proves themselves worthy. When that fails, Titus takes over the body of either Teor or one of the protagonist's close friends, depending on the route.
- Developer's Foresight: If the player manages to defeat Titus I at the bottom of the crypt without having obtained the Iterio Fragment, the game will warn that you still lack an important item before you enter the final dungeon. In addition, every fight against Titus during the game's final segment will have the protagonist becoming enthralled just like the crypt fight.
- Difficult, but Awesome: The TTEXP system rewards players if they can gather enough EXP before returning to town, and the requirement increases by 100 each time. The player can meet multiple TTEXP thresholds in one dungeon session, but upon returning to town, TTEXP is set to 0. This encourages players to get as much done as they can in one dungeon session, which can be dangerous on normal and above due to limited save opportunities.
- Duel Boss:
- In the upper part of the Dragon Tower, the player can select a party member to fight the self-proclaimed Nightseed King, who is immune to weapons and magic, but not fists. If the chosen character wins, the Nightseed King rewards the player with strength-boosting equipment.
- In the Ancient City, once per day, the player can select a party member to fight several consecutive duels against human minibosses in an arena.
- On the Rogue Route, Laban will offer to fight Uryu one-on-one in the duke's mansion. While she is normally a very strong boss, she gets weakened in this duel because Laban is familiar with her swordplay, enough to practically No-Sell her attacks.
- On the Sage Route, Syphon can be challenged to one when you first meet him in the tavern.
- Dungeon Crawling: The gameplay involves exploring nodes on a map in order to activate events and expand the visibility of the map. These nodes can contain any combination of rewards, traps, battles, and lore.
- Did We Just Have Tea with Cthulhu?: On the Sage Route's unique dungeon, the Cosmos, the player can meet some sort of rainbow-colored, cone-shaped alien creature with four tentacles, known simply as "Old One" (actually a mistranslation of "The Great Race", as in the Great Race of Yith), escaping from Somnium Crystals. Rescuing it will result in some friendly chatter before being given the option to have it join you. Reaching the end of the dungeon will have the Old One bestow upon the player some bonus SP.
- Early Game Hell:
- The early game equipment isn't able to cover all ailments and elements, making it easy to get wiped out due to a lack of resistances. The later part of the game makes it easier to build against bosses' traits and skillsets, especially if the player knows which random drops to save scum for.
- Any magic users' max MP at the start isn't high, which is a problem when the player isn't rich enough to afford a lot of MP restoratives and spells can be MP-hungry, making physical-based fighters necessary. One way of solving this is Salads, which recover 30% of a user's max MP outside of battle and only take 1 Vegetable to make; using 2 Vegetables guarantee a successful Salad whereas 1 Vegetable has a 1-in-3 chance, but this can be mitigated by having a party member with high Cooking skill.
- Elite Four: The four towers inside the ruins each contain a species leader acting as a living keystone for the ancient empire's barrier, holding onto a gem given to them by Titus I that ensorcelled the leaders into obeying his command even long after his death and Archea's ruin. The only exception to this is the long-dead dragon, whose gem can be easily taken hanging from a fang on its skeleton. The other gem holders however must be fought.
- Excalibur in the Rust: Amongst the rare materials found in the ruins are Rusted Weapons and Rusted Armor, implied to be extraordinary items from the old days that when used in crafting, they result in some of the best weapons and accessories to be had.
- Expy: The plot amongst other features bear many similarities to The Lord of the Rings.
- When Titus I built his empire, he subjugated the ancient races he defeated by giving their leaders special gems that turned them into living keystones for his empire's barrier; the dwarves in particular received a ring that enthralled the wearer. A scene of the past viewed in the underground spring shows Titus I personally forged them as "four snakes bursting into flames, each with ornamental jewels in their mouths", bringing rings to mind. Sauron similarly controlled Men, Elves and Dwarves through the rings of power.
- The Quartz Bottle is an item earned upon climbing to the top of the elf-inhabited Fairy Tower, taking an artificial "star" from the ceiling and putting it into a bottle, giving the player an infinite, costless version of lamps and Firefly spells. Frodo gains a similar item from elven lady Galadriel, called the Phial of Galadriel, also known as the star-glass.
- Frodo was responsible for Sauron's defeat by taking the One Ring into Mount Doom, only for his Heroic Willpower to fail him at the last moment, followed by Gollum stealing it but falling into lava with the Ring. The Protagonist disposes of the four cursed gems in a reverse twist: they go to an underground spring where they can successfully resist Titus I's temptations to keep them and throws them into the water, causing the gems to fuse together with Yunum's Moonstone into the Iterio Fragment, a Virtuous Character Copy of the One Ring that gets used against Titus I, albeit playing only a part in his downfall rather than an instant-victory Soul Jar.
- Fishing Minigame: There is an option to go fishing in bodies of water like the Port, as long as one has a Fishing Rod. Whenever something is caught, the rod's durability decreases (initially a value of 100) and will break once it hits zero, the same as pickaxes. Besides fish, it is possible to get other key items like Treasure Memos.
- Forced Sleep: After the Nightseed attack Holm, Chuna and many other children of the town fall into slumber that no one could wake up from; dispelling this disease becomes one of the motivations of the party, especially for Paris and a Rogue Protagonist. Delving into the Great Ruins turns up dark obelisks (just like the one in the town plaza) that encase children, whereupon touching one transports the party into the city of Argadium, the capital of the Archean Empire, in its final days. There, Yulia the shrine maiden reveals that the city is an illusion repeating itself, maintained by the children dreaming of it, in which case are the same ones inside the obelisks found in the real world; returning to Holm after half a year passed shows that Chuna and the children are sprouting violet crystals. Teor's research into it reveals that the crystals are a celestial, parasitic entity known as Star Spirits that induce people into dreaming, which are being powered by Titus I's magic to force Star Spirit-encased children into dreaming of his empire for all eternity. Eventually when the illusion of Argadium appears in the sky, Star Spirits start to crystallize all over the town and have encased even adults, with conscious ones still in the process.
- Frame-Up: On the Rogue route, it's revealed Paris's mother was executed by Duke Kamur for supposedly heinous crimes. In reality, the government pressured him to frame her because she found a baby who had a connection to West Siwa's royal family.
- Golden Ending: If the player defeats the Final Boss within 10 turns, the party gets to return to Holm without being frozen in time by Titus's spell, allowing them to reunite with their friends. However, this ending is not considered the "true ending" despite being harder to obtain than the actual true ending.
- Guest-Star Party Member: The fourth party slot is reserved for temporary party members and summonable allies. These party members usually leave the moment the player returns to town or another guest joins, though some of them can rejoin as normal party members. Significant guests include Dalim, who joins as an AI-controlled ally in the Dwarf Tower and Chuna, who joins right before the Final Boss in the rogue route.
- Guide Dang It!: Kileha's sidequest requires the player to raise her affection to 12 if the protagonist is male or 15 is the protagonist is female, and this has to be done sometime before clearing two of the Fairy, Giant, and Dwarf Towers. While the rest of the quest is easy to clear, activating the quest in the first place requires the player to know about the deadline. The only saving grace is that the skill she learns from the quest can be obtained by leveling her to 25.
- Heroic Fantasy: The game's plot overall fits as such; it is set in a world where medieval kingdoms, knights, magicians and monsters are commonplace, centered around a peaceful town where the protagonist lives until one day, they and some friends stumble on a cave that starts spewing demons called Nightseed threatening the town, followed by children suddenly falling into an endless sleep and disasters from locust swarms to disease outbreaks. To save the afflicted and stop the monsters, the protagonist forms a group of ragtag heroes to delve into the cave revealed to contain ancient, underground ruins, fighting all manner of creatures and solving mysteries. The ruins' discovery at a later point brings the wider geopolitics of the world into play, but the story always falls back to the protagonists' journey into the ruins.
- Inconsistent Spelling:
- The first and only English translation of the game is the work done by the Dinklations fan translation team, which has expertly rendered the Japanese script well into English. Unfortunately, they had to take liberties on occasion due to game engine character limits, resulting in errors such as Syphon's summon skill Spirit No. 8 being a name actually cut down from "Spirit Construct #8", and the "Old One" is a mistranslation of the "Great Race" (meant to stand for "The Great Race of Yith").
- Archiphea's name is spelled as "Arcfia" on the world map.
- Indestructible Edible: This is only played straight with preserved foods like jerky, which can be made by combining ingredients with Mysterious Salt. These preserved foods won't expire, making it possible to hoard them over the course of an entire playthrough. All other foods have a chance of expiring whenever a day passes.
- I Need You Stronger: In order for Titus I to take over the protagonist's body, the latter needs to prove themselves equal to the former by performing the same feats. This requires the protagonist to go through the ruins and subjugate the bosses of Dragon, Fairy, Dwarf, and Giant Towers. As a result, Titus I doesn't take direct action against the protagonist until the latter resists his control in the Cemetery dungeon.
- Interface Spoiler: On the priest route, you will be joined by a boy simply known as "Boy" in the route's unique dungeon, Oblivion. Taking a look at his skillset shows that he shares the exact same skills as Melodarke, and at the end of the dungeon that's who he's ultimately revealed to be.
- Job System: "Titles", as termed in this game. In the beginning, the Protagonist has a choice of four Origins that determines their first Title, which changes depending on gender but are otherwise the same: Child of a Knight, Raised by Criminals, Sage's Disciple, and Temple Orphan. After the Nightseed attack Holm, by interacting with the sanctuary to Archiphea on the riverbank, the player gains access to Titles, classes that can be switched out by the Protagonist that have their own stat bonuses and penalties, but require Skill Points (SP) to level up and gain the Title's skills (up to Level 5). Choosing an Origin can cheapen the SP costs of related Titles while making others expensive (e.g. a Knight Protagonist can level up Warrior for 2 SP, but 6 SP for Bard); in addition, unlocking Titles requires both SP and Proof of Experience (Proof of Skill for Basic Titles, Proof of Achievement for Advanced Titles), which are usually earned after major events like defeating bosses, though it is possible to stumble upon them during searching. In the beginning, the player gets a list of ten Basic TitlesList. Further in the game, they get to pick from ten Advanced TitlesList.
- Karma Houdini: On the Rogue route, Pingar captures and sells the crystallized children to Teor for profit, forcing the heroes to infiltrate the Lord's Mansion where they're being kept, defeat Teor and rescue the children. Afterwards, Pingar flees (yet again after Kamur's assassination) and faces no consequences for his actions.
- Laser-Guided Karma: If the River Girl legend is true, then the Princess of Varamere used a love potion to seduce Titus I and lead him to betray Archiphea. However, she ended up betrayed and subjugated as one of his demon lords, which might not have happened if it weren't for her love potion.
- Leaked Experience: Only EXP from events are leaked to inactive party members, but EXP from the battles themselves aren't.
- Lethal Chef: While many characters can learn the Cooking skill, some have a higher chance of making failure dishes known as Dark Cuisine. Melodarke and Fran have the highest chance of 90% to produce failures, which isn't necessarily a bad thing since it's possible to use Dark Cuisine as attack items in battle. The two also have the best chance of producing Polalapo, a Dark Cuisine that acts as the game's cheapest, if vilest revival food item.
- Multiple Endings: There are two different main endings, though there are dialogue variations based on who has the highest affection. There are also a few Non-Standard Game Over endings as well.
- If the final boss is beaten in 10 or less turns, the main character gets to return to Holm and talk to all of their friends before moving on with their life. The turn limit is increased on subsequent New Game Plus runs.
- If the final boss isn't beaten in time, the party is frozen in time for at least 170 years before waking up in a later era, where Holm no longer exists. However, the people of the modern day tell tales of the protagonist being the hero who saved the world. Despite this ending being easier to obtain, it is considered the true ending.
- If the player racked up too much bad karma and is cursed by one of the elemental gems, Titus I successfully possesses the protagonist when he's confronted in the Cemetery.
- On the Priest Route, Melodarke will leave a note for the Protagonist to meet him alone at the town graveyard about the circumstances of their birth. He reveals that he has arrived with the Temple Guard with the intent to take the protagonist away and imprison them to prevent the resurrection of Titus I. Normally, your other party members will rebuke him for this and refuse to let him take the protagonist. If you do go alone however, you have the option to accept, which will lead to a Non-Standard Game Over.
- In the Sage Route's exclusive dungeon, the Protagonist can find the planet of Mars Skies where a couple of tribes are warring with each other... over what they should put on fried eggs. The Protagonist randomly suggests mayonnaise, which gets amazing reception that it ends war immediately, then causes the Princess to ask for the Protagonist's hand in marriage and become the President of Mars. The game obligingly warns you once that you won't leave should you accept her hand; confirmation ends in a jokey Non-Standard Game Over. At least it's a rare one where the Protagonist isn't dead and miserable.
- Mentor Occupational Hazard: Deneros the sage has his hut burned down by the Temple Guard once the invasion of Holm takes place. Despite this, he makes it out safely and takes refuge in a section of the ruins, where he can continue to sell the player herbs. However, on the Sage Route, he will have injured himself searching for the Protagonist when they disappear into the ancient city. This leaves him in poor health and in no condition to resist the Temple Guard once the invasion begins. While he still attempts to escape with the Protagonist, he is shot by an arrow and dies right there. His last words to them was to "search for the Silver Tower."
- Necromancer: One of the Titles that the Protagonist can take up, except it doesn't have anything to do with raising the dead and is more of a magician that uses dark and thunder-related spells. The Fiend Title does have a Level 2 skill to enthrall an undead enemy over to their side though.
- Non-Combat EXP: Because exploration is a central part of the game, the best way to gain experience is by living through special events, accomplishing major feats, and making new discoveries. Fighting ordinary mooks almost always rewards less in comparison; compare slaying one goblin at the cave entrance (2 EXP) to discovering something in a new node (a whopping 30 EXP). This is encouraged by the random enemy encounter rate going down with every fight until it hits zero whereas there's almost always going to be new nodes to look into with every node explored, helped by the TTEXP system rewarding SP the more EXP is gathered in one ruin-diving session.
- Our Demons Are Different: The Nightseed are demons inhabiting the ruins, many of which are standard fantasy RPG fare like slimes, goblins, ogres, skeletons, harpies, and so on, as well as possessing enough intelligence to speak in some cases and rapidly deteriorate into nothing upon death. Despite this, they are always hostile, excepting very special cases like the Nightseed King. Various locations such as the stronghold in the dream of Argadium show that Nightseed are artificially made by hanging human remains over pits, letting blood drip into pools where the demons are formed and incubated; rather than natural monsters, the Nightseed are meant to serve Titus I as his army, which are being let loose in the present to spread the Star Spirits.
- Outside-the-Box Tactic: Demon Lord Namris is immune to all attacks from humans, and the game expects the player to recruit the dragon girl, Enda, to damage him. However, if that isn't an option or if the player wants to get his bonus drop, he can be killed through summoned beasts, angels, and strategies involving ailment-inflicting items.
- Permanently Missable Content: Kileha's sidequest will be lost if the player cannot raise her affection enough before the Holm occupation event.
- Praetorian Guard: The Demon Lords are a group of cloaked people who make for very powerful boss fights, having been cursed by Titus I into serving him for all eternity. Four of them—Namris, Darmadius, Larg, and Kulum—can be fought throughout the ruins, while the last, Ibia, is found outside of Holm, creating Nightseed for further attacks on the land.
- Psycho for Hire: Uryu is a kill-happy swordswoman who takes on hit jobs for the thrill of the hunt. She is encountered in the rogue route due to Teor and Pingar hiring her.
- Random Encounter: Excepting scripted encounters, investigating a node gives a chance to encounter a random enemy. With every random encounter, the chances of it happening reduces until it hits zero before resetting once the player calls it a day. The player can artificially reduce the encounter rate by using the Stealth exploration skill repeatedly.
- Rare Random Drop:
- There are random drops from both the regular battle system and the dungeon event system. This means winning a regular battle could cause the player to receive both the normal battle reward and the event's reward, with the latter dependent on the current map rather than the enemy.
- In the Burial Chamber dungeon, each of the undead Titus minibosses have equipment with low drop rates that range from 10 to 20 percent. Fortunately, they respawn each day, but it's bound to be a long grind.
- Realpolitik: Duke Kamur didn't want to execute Paris's mother, but the government forced him to do so because she adopted a baby that West Siwa wanted dead. If he refused, West Siwa would have declared war on the Kness Dukedom. However, he spares her adopted children, fakes their deaths, and refuses to kill them even when they later try to go after him for revenge.
- Replay Value: In addition to the New Game Plus feature, the player's starting class can alter the story significantly. This decision changes the protagonist's relationship with various characters, changes the protagonist's upbringing, changes what Titles are easier to get, changes who gets possessed by Titus I, and grants access to route-specific dungeons.
- Resurrective Immortality: The Executioner from the Palace dungeon revives every time he's killed. To get rid of him, the player has to either throw him outside of the dungeon or kill Emperor Titus XVI, who is the source of the Executioner's power.
- Royally Screwed Up: Zigzagged with the Titus royal line of sixteen emperors. Some of them were benevolent and competent rulers, but many also went mad with power. It's implied that Titus I had a hand in driving them to madness as part of his conspiracy to preserve his immortal spirit.
- Save Scumming: The TTEXP system rewards players for accumulating a lot of experience before returning to town, which is intended to discourage returning to town constantly to save. However, the random drop events can still encourage save scumming if the player needs rare drops from those, since the number of random battles are limited each day. Save scumming is also encouraged for cooking, which produces random results.
- The Seven Mysteries: An old man in Hibaritei will talk about the Seven Wonders of Holm, all of which pertain to actual beings that can be found in the game."First, the cannibal demon of the wasteland. Second, the will-o’-the-wisp in the swamp. Third, the fairy village of the lake. Fourth, the cursed great ape. Fifth, the giant dance theater. Sixth, the baby that washed ashore on the river. And the seventh. If you hear the seven wonders, you’ll die! KYA!!"
- Shadow Dictator: Notes from Titus XVI indicate Titus I manipulated all future generations of Archean emperors behind the scenes as a bid to maintain his power and immortality, having them secretly perform experiments to find a way to extend his life.
- Silicon-Based Life: After the Nightseed attack on the town, several children, including Chuna, fall asleep and slowly have their bodies enveloped by sentient purple crystals. These are later revealed to be Star Spirits, parasitic mineral lifeforms from the celestial sphere which seek out intelligent life, force their victims to dream and leech off their mental activity for energy.
- Supreme Chef: Of all characters, Kileha and Allson have the highest chance of succeeding when they use the cooking mechanic. This can save time in save-scumming to get the best cooking results.
- Teleportation: The game has fast travel in the form of mysterious warp points placed in certain spots that connect you to the ruin entrance. They're incredibly sparse though, placed only in strategic points so there's at least one in every Tower and inside locations that are hard to reach.
- Trap Is the Only Option: The Perception skill allows the user to detect traps and ambushes. However, some of these bad events have to be dealt with in order to make story progress. Even optional traps can grant additional EXP if they player survives, making it inevitable for such traps to be triggered.
- Trial-and-Error Gameplay:
- The nodes in the dungeon crawling system can contain useful rewards, traps, or both. There's no way to figure out the best approach without taking a leap of faith or looking up a guide.
- Unlike the mixing menu, the cooking menu doesn't list all the recipes, meaning players will need to experiment in order to find out what foods they can make.
- Unexpectedly Realistic Gameplay:
- Lighting in the ruins can be done by using magic or lighting an oil lantern, which allows for the discovery of hidden nodes, incur special events, and raises the chance of a successful lockpicking by 10%. As a caveat, enemy encounters also have a higher chance of happening. There are also rare surprises like falling into water which snuffs out the light, forcing the player to make a light again.
- Food has a high chance of spoiling whenever a day passes, so they must be used once made and prepared every day instead of stocking up. The only things that don't spoil are foods and ingredients preserved by using Mysterious Salt on them.
- While extremely rare, there are flying enemies in locations like the Fairy Tower where there is no ground to reach them and thus renders them immune to melee attacks. This leaves ranged attacks like bows, flails and spells as the only ways of damaging them.
- Unreliable Expositor: The player can collect several in-game legends and fairy tales, but it's uncertain which ones are the most truthful, since any of the authors could have unreliable or biased accounts. It doesn't help that some of the lore have contradictory accounts.
- An example is "River Girl" and "Witch of Varamere", with the former painting the Varamere princess and Titus's relationship as being induced by a love potion and the latter implying their love was initially genuine.
- "Child’s Myth Vol. 4" tells the story of how the Devil King of Mardilia was slain by a party led by a hero and a prince, the former of whom delivered the deathblow and was cursed to live until he saw the Devil King's second coming. Most of it is actually true (helped by the event being 200 years ago) save for one detail as verified by Laban, who is said hero, as he can reveal before the penultimate battle with Overlord. The prince is actually a princess he married and they founded the Kingdom of Siwa together, making him an ancestor to Teor and Parcia.
- Vestigial Empire: According to lore and a lecture by Zepek, the setting of the game takes place in a great river basin that used to be ruled over by the Kingdom of Siwa after the Devil King of Mardilia was slain by a hero and his party, its members including the prince of Siwa. Siwa however became divided by royal infighting, causing the river basin to split into three nations that warred with each other until a peace treaty was signed 30 years ago: the Kness Dukedom (Holm is located on its southwestern edge); El Padilla; and the Kingdom of West Siwa, now only occupying the fraction that is the west, which is also next to the Isle of Yulefrere, headquarters of the River Temple.
- Villain-Beating Artifact: Weapons with the Divine magical attribute deal more damage against the Final Boss, Titus I. These endgame weapons are unique to the starting origin the player chooses and must be earned through completing the origin's exclusive sidequest.
- Well-Intentioned Extremist: The River Temple Guards team up with West Siwa to occupy Holm. While West Siwa just wants to claim territory, the Temple Guards believes that the people of the town must be subjugated to prevent any further exploration of the ruins. Balsimus, a high-ranking priest, believes that the power in the ruins will lead to the end of the world. In the ending, the Temple Guards abandon the war because the protagonist took out Titus I, giving the Temple no more reason to fear Holm.