Pfft. Cheats make a game suck. I used them to learn the mechanics, and it felt so boring it was unbelievable. There is no God mode anyway, the cheats are things like repair ship, build now, free money, free rubbish ship. If you want to play God, lower the diff level. But, failing that,
Link has your codes. Enjoy the game becoming unfun.
Oh, "beaten the game" means nothing. You beat it on suicidal, THEN you're special. What diff you playing?