M468 assault rifle:
     Hold  RB and press Up, Y, Down, A, Left, X, Right, B, Left, Left,
Right, X at the title screen.

MTAR-21 assault rifle:
     Hold RB and press Down, Down, Up, Up, X, B, X, B, Y, Up, Up, Y at
the title screen.

Super ragdoll effects:
     Pause  the  game  play during an offline single player game, then
hold RB and press A, A, B, B, X, X, Y, Y, A, B, X, Y.

Third person view:
     Pause  the  game  play during an offline single player game, then
hold  RB  and  press  X,  B, X, B, click Left Analog-stick, click Left
Analog-stick,  press Y, A, Y, A, click Right Analog-stick, click Right
Analog-stick.

Big heads:
     Pause  the  game  play  during an offline single player game, the
hold  RB and press B, X, A, Y, click Left Analog-stick, press Y, A, X,
B, click Right Analog-stick.

One hit kills:
     Pause  the  game  play during an offline single player game, then
hold   RB  and  press  Left  Analog-stick,  Right  Analog-stick,  Left
Analog-stick, Right Analog-stick, press A, B, click Left Analog-stick,
Right Analog-stick, Left Analog-stick, Right Analog-stick, press X, Y.

Laser bullets (GiDoeJoe Mode):
     Host  an  online game. Press Start during game play, then hold Rb
and  click  Left Analog-stick, click Left Analog-stick, press A, click
Right  Analog-stick,  click  Right  Analog-stick,  press B, click Left
Analog-stick,   click   Left   Analog-stick,   press  X,  click  Right
Analog-stick,  click  Right  Analog-stick, press Y. Bullets from Alpha
team/Rainbow   will   be   blue   lasers,   while   those  from  Bravo
Team/terrorists will be red lasers.

Unlock Comcast Even Map:
     Go  to  the  Main Menu. Select Extras. Select Comcast Gift. Enter
'Comcast Faster' to unlock the multi-player map Comcast Event.