Enter as a code:

Unlock all cheats - TWLVCHTS 
Super cheats - ZTJRWLDW 
Big guns - PNFL 
Huge guns - QDDMG 
Nukes - FTMN 
Overlords - CRNFX 
Bomb ball weapons - CDDDHLR 
Bomb ball - Opus QPVS 
Invincibility - MRCHBB 
Less damage - CHNKY 
Ghost mode - SNKY 
All FMVs - DVD 
Disable WDL Tax - SWSSBNK 
Permanent power-ups - GVTBCK 
Hover mode - SKTCHY 
Mega convoy - NPRBLM 
Fast jets - STBLT 
Extra money - WRCHST 
Double money - KCHNG 
Super armor - FLYNGTNK 
All weapons - NFCH 
Free ammunition - SPW 
Bomb ball - TWLVCHTS 
Unlock all cheats - BMBBLL 
Free EMC - SMKTRL 
All jets - SHWRM 
Speed shots - ZPPY 
Dual fire - TWFRN 
Spin shots - SPNNY 
Vampire mode - SLRP 
Top Gun mode - TPGN