I'm pretty sure there aren't any. Games haven't had cheat codes since the PS2 era. Usually the only cheats in current gen games are ones entered via a cheat codes screen in the options menu and those are usually limited to only one or two specifically put there by the devs. I'm fairly certain that UN doesn't have one of those.
you should report a shipping issue. I really hate how long they take to send stuff. I'm considering reporting a game I sent back on tuesday (the second) because they still have not gotten it and I'm sick of waiting.
There both completely different games with completely different styles. I'd have to say black ops because I hate the feel of all of halo's weapons (the entire series) and its story is told so poorly its hard to know whats even going on half the time.
according to gamefly, it comes out november 15th, just a few days after skyrim (maybe the same day or a week after, because the 11th is a friday and games always come out on tuesdays). That's a bad date, as I'm sure many (myself included) will buy skyrim and rent AC:R months later.
The issue with gamestop is that half their emploies aren't into games. They really should stick to only employing gamers. Now that they have some real competition (amazon and Play n trade) hopefully they will stop that and start being more competitive.