Game vampire survivors By defeating monsters and exploring the stage, the player can acquire experience gems, which are used to level up, "floor chicken," which restores the player's health, and other useful goods. Each level rise gives the player the option of three or four weapons and passive power-ups; once the player has gathered six weapons and six power-ups and fully upgraded them all, any subsequent levels offer just gold coins or floor chicken. Opening chests, which are dropped by extremely powerful enemies and may contain one, three, or five random things, is another way to upgrade weapons and power-ups. Most weapons have an ultimate version that can be obtained after fully upgrading them and satisfying additional requirements.