Level Codes:
To access a level within the NOD mission disk, enter the appropriate code:

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


GDI 
Missions:

     2-B9DTX02D0 
     3-25U1E2L4D 
     4-KED688DGU 
     5-OXL3NYNNO 
     6-DU5R21DG7 
     7-OX3CS3D4G 
     8-9QGZLZDF8 
     9-IU75TQK8H 
     10-OYGNYMYYN 
     11-CR5EQME0S 
     12-3NUL6OFQI 
     13-4N8AN1A0H 
     14-3NWD3MQFT 
     15-457ED7G0U 


Air Strike:
While in the middle of battle at any time press the following button combination for an Air Strike:

     Right, Down, Left, Down, Right, Circle, Square, Triangle 


Ion Cannon:
While in the middle of battle press the following at anytime for an Ion Cannon. 

     Right, Down, Left, Down, Right, X, Square, Triangle