There is also this:
Unlock TAR-21
When you are customizing your character. (Changing guns + clothing)
(Hold RB) Down, Down, Up, Up, X, B, X, B, Y, Up, Up, Y.
There are other ones for weapons but I just don't know them yet so ill edit when I do or someone else posts.
And for single player:
While in game, open the pause menu, hold the right shoulder button and enter the following code
Left Thumbstick, Left Thumbstick, A, Right Thumbstick, Right Thumbstick, B, Left Thumbstick, Left Thumbstick, X, Right Thumbstick, Right Thumbstick, Y : Change bullet tracers color
A, A, B, B, X, X, Y, Y, A, B, X, Y : Increase ragdoll strength
X, B, X, B, Left Thumbstick, Left Thumbstick, Y, A, Y, A, Right Thumbstick, Right Thumbstick : Third person view |