Build a powerful backpack from randomly offered weapons, merge matching gear, and defend your Guardian against increasingly dangerous monster waves. Smart packing before battle is the key to clearing every stage.
Only items placed inside the backpack are equipped for battle. Drag differently shaped weapons to use every available space; items left outside are discarded when the fight begins. Each stage can also change the shape of the backpack, creating a new packing challenge.
Combine two copies of the same weapon at the same level to create a stronger one. Merging boosts damage, defense, and healing, and an item can be merged twice. A compact set of upgraded weapons can be more valuable than filling every slot with basic gear.
Defeated monsters drop gems that can be spent to replace the current item choices. The first reroll of a run is free, later rerolls become progressively more expensive, and only one reroll is available during each preparation phase. In battle, activate a three-second shield when danger peaks or cycle through 1x, 2x, and 3x speed.
Defeat every wave in a stage to unlock the next destination. Monster numbers, health, damage, and movement speed rise as you progress. Unlock new Guardians, upgrade their stats, and equip skins between runs. If your Guardian falls, you can spend coins to revive once; between successful waves, your active run can be saved and resumed from the lobby.
