To unlock some extra jibes, go to the Code Selection screen and enter this code: sohappy.
Every game needs a big head mode. To get NBA 2K2's, go to the Code Selection screen and enter: heliumbrain.
As Chevy Chase once so eloquently said, "Be the ball." Enter that code (betheball) at the Code Selection screen.
To put your ballers in some fly, old scgool threads, go to the Code Selection screen and enter this code: the70slive.
To unlock even more players for the Hidden Team (make sure you enter that code first), go to the Code Selection screen and enter: Marrinson.
To unlock a hidden team, go to the Codes Selection screen and enter: VC.
To unlock infected players, go to the Code Selection screen and enter this code: tvirus. Get it?
To unlock monster players, go to the Code Selection screen and enter this code: alienbrain.
To unlock some interesting extra commentary, go to the Code Selection screen and enter this code: whatamisaying.