The Megacorp Helmet is an item in Going Commando and Up Your Arsenal. It is a helmet used by Megacorp commandos which allows the wearer to breathe in any environment, including underwater and in space, by synthesizing and recycling a supply of oxygen. It also displays HUD readouts. It is grey in color and has a green tinted face shield. Ratchet used the item both as a commando in the Bogon Galaxy and when returning to the Solana Galaxy to fight Dr. Nefarious, though it has a transparent face shield in the latter appearance.
Its functionality is identical to the O2 Mask.