Rating:

2007-08-17
Hacks

to start the GI Joe mode you must be the host or in single player.
1 pause the game by pressing start.
2 hold the left bumper aka LB the press the following
left stick x2, A, Right stick x 2, B, Left stick x2, X right stick x2, Y

If done correctly a message should pop up in red letters confirming the activation of the GI Joe mode.
With this cheat activated you will now see red tracers form the bad guys and blue from your team.

Rating:

2007-08-13
Cheat Codes/Unlockables

While in game, open the pause menu, hold the left shoulder button and enter the following code (single player only):

B, X, A, Y, Left, Y, A, X, B, Right - All characters have big head
Left, Left, A, Right, Right, B, Left, Left, X, Right, Right, Y - Change bullet tracers color
Left, Right, Left, Right, A, B, Left, Right, Left, Right, X, Y - Characters are kill we only one shot
A, A, B, B, X, X, Y, Y, A, B, X, Y - Increase ragdoll strength
X, B, X, B, Left, Left, Y, A, Y, A, Right, Right - Third person view