Is a lot like the Marathon Cheater, but with a few differences. It's a bit more flexible (with more info) on stuff like Oxygen, Invincibility, etc (it'll give you approximate durations). It will add fist power-ups. (I don't know what this means... I didn't see any effects when I tried it). It will play your Marathon Music while it's working. (This can be cancelled.) It only works on the Infinity demo, M2 and the M2 Preview and Demo. $5 shareware. Update adds a very cool Full Map feature, and a bunch of 68K-only enhancements (save anywhere, start with extra health/oxygen, etc.)