Covert Operations  -  To access the covert operation missions, enter the password "covertops". This works for both NOD and GDI. 

Extra $5,000  -  While playing, pause the game and press Right, Down, Down, Left, L1, Left, Right, Down, Left. Press Start to resume play with an extra $5,000. 

Free Men  -  On any level, build 14 silos and then delete every one of them. Then build 2 refineries. After than, when 1 of your men dies, 10 men will come out of your barracks. The new men are free. 

GDI Passwords 

Level Password
2 04XFOOP3W
3 W3KIESA3O
4 A8OTO3WIW
5 W1N457LJ4
6 OLXRH5ZUS
7 OX3CS3D4G
8 036Y0TVNY
9 V199PXG5L
10 8PH1NEGII
11 GTJKF2J00
12 T0RMFVVM5
13 AQU7OQ65A
14 KV2UWMZJ9
15 GTJ2PV46O

Instant Air Strike  -  While playing, pause the game and press Right, Down, Left, Left, Down, Right, Right, Down, Left, X, Square, Circle. Press Start to resume play and activate your code. 

Instant Ion Cannon  -  While playing, pause the game and press Right, Down, Left, Left, Down, Right, Right, Down, Left, X, Square, Triangle. Press Start to resume play and activate your code. 

Instant Nuclear Strike  -  While playing, pause the game and press RIGHT, DOWN, LEFT, LEFT, DOWN, RIGHT, RIGHT, DOWN, LEFT, X, UP, X. Press START to resume play and launch your attack. 

Japanese Mode  -  Enter the password "GODZILLA". All voices will be in Japanese. 

Laser orcas  -  When playing the GDI disc enter the code as patsux. You start with 10,000 10 commandos and your orcas shoot lasers. 

NOD Passwords 

Level Password
2 C99FAXKW8 
3 RZNLQZ3NL 
4 W1954XWLF 
5 W15DASRS8 
6 8PH1MR53W 
7 GTJKWOJDK 
8 YKK424K3D 
9 874LCPUT4 
10 A8SHPAHXW 
11 OX3UKOP94 
12 QGDUMSK2J 
13 SZP09VDSB 

Secret Level  -  On the GDI disk, enter your password as PATSUX. This takes you to a secret level where you start with 12 commandos, $10,000 and a lot of tiberium! 

Sell vehicles  -  When you have a vehicle you want to sell, build a repair bay and put your vehicle on it. Press square to get to the sell icon and make sure the sell icon is on your vehicle, then press x. 

View Entire Map  -  To view the whole map area, press and hold L1 + L2 + R1 + R2 + Circle + Square while entering a password or beginning a new game. Release the buttons when the mission briefing begins. 

View Entire Map while Playing Mission  -  While playing, pause the game and press Circle, Circle, Circle, Up, Circle, Square, R1, Circle, Circle, Circle. Unpause the game to reveal the map.