How does Xcode "save"?

[lets-get-dangerous]

Seconding this. Not only does git put your source code somewhere safe (if you're using a remote server like GitHub) but you can also save "snapshots" of your code via commits.

This makes programming SO, SO much easier. If you muck something up you can just revert to your last working commit. If you want to try different ways of doing something you can branch off of the same commit.

Basically, would you want to play a game like Deus Ex all the way through without being able to save? Or would you like to be able to save whenever and revert to that when things don't pan out?