O2 Masks were very similar to MegaCorp Helmets in Ratchet & Clank: Going Commando and Ratchet & Clank: Up Your Arsenal. This gadget also appeared in Ratchet & Clank Future: Tools of Destruction and Ratchet & Clank Future: Quest for Booty along with the Grind Boots, Gravity Boots, and Swingshot from the beginning of the game without having to be found. The O2 Mask appears in A Crack in Time, when Ratchet wanders moons in space and when he is outside Lord Vorselon's ship.