The game features multiple game modes that focus on cooperative play; the default mode involves collecting crests to unlock doors, filling blood machines (which reduce precious health), and retreating back to the elevator. Each level consists of randomly arranged rooms, and mission success results in useful permanent upgrades. There are only five weapons in the game but they cover all of the necessary types (pistol, shotgun, submachine gun, railgun, nailgun). It takes time to pick items (health and ammunition, mostly) up, a process that also may spawn more enemies. Weapon mods and totems may also be collected for in-game upgrades. The enemies are repetitive but plentiful and may spawn from anywhere. Unloved is a fast-paced, old-school shooter full of action with replay value thanks to its level layout randomization and online cooperative play.