I quite liked how cheats were something you could actually earn, although in that way they're less of cheats and more of just codes. And sometimes you didn't need to earn them if you didn't want to. Turn off achievements when using cheats, but have an achievement for using a cheat ("acheatment"?). Or better yet an achievement only available by putting in a specific heat. Okay, maybe not "better yet", but...
Anyway, the real reason I checked to see if there was a topic on this:
Obviously should be a cheat.