Anniversary Armageddon was a community-run online event consisting of four unique ARMS events held for the game's fifth anniversary in June of 2022. Day 1 of the event was The Appetizer, a series of handpicked grudge matches leading into a double elimination bracket of their winners. Day 2 had Default Derby Deluxe, a play on the Default Derby tournament series which restricts players into only using a fighter's default ARMS loadouts. Day 3 was Customs Clash Championship, a double elimination tournament featuring the Backroom ruleset. Day 4 featured the Legends VS. A New Generation crew battle between a group of five legacy players and five more recent ones.
