Critical O2 cover art

Sci-Fi Survival Horror

Critical O2

Stretch your air. Push deeper into the wreck. Shut down The Core Anomaly before your suit fails for good.

Pay what you want · suggested $4

This is a complete, standalone game. All you need is a standard deck of cards — the SRD is not required to play.

What's inside

The derelict's been dark for years, and your suit's running out of air faster than the wreck is giving up its secrets. Push deeper into the hull, stretch every breath, and decide how far you'll go before the ship — or whatever's still moving inside it — decides for you.