Laser Orcas
To be able to build laser orcas you must press, during the game, x, y, z, right, down, left, up, right, down, left, up, a.
Note: In all the cheats written by me be sure not to have assigned units to the x, y and z buttons.

Extra units
With this cheat you will be able to build commandos, S.S.M. launchers and ch-47 "Chinhook". During the game and after you build the Advanced Communications Center press y, a, b, b, a, down, a, b, b, a, down, up, then build barracks to build commandos, a heli-pad to build ch-47s and a weapons factory to build the S.S.M. Launcher.

Bio Lab
During the game press c, right, a, z, y, b, up, b, b, a. Then a new building will be available, after you build it a new unit will appear, the Visceroid.

Reveal Entire Map
During any mission just press: "Up, Down, Right, Left, A, Up, Down, Right, Left, A. Now you can see the enemy's base, backup tiberium and when they are attacking and from where.

Cheat
While playing press: abc,left,down,right,up,left,down,right,up and than a for nuke,b for ioncannon,or c for air strike