I highly suggest playing the game without any cheats. It's really not a hard game in the first place. They overload you with bullets and health.
I think I died only once and that's because I wanted to see what would happen if I held on to a live grenade(instant death
). You would be cheapening the experience if you cheat.
In the end though, I really couldn't give a damn if people cheated in single player games, it only matters to me when it effects other people(multiplayer).
So happy cheating to all your wussies
