BattleTanx

Invincibility
Enter "MSTSRVV" as a password.

Infinite lives
Enter "LVFRVR" as a password.

Infinite ammunition
Enter "LTSFBLLTS" as a password.

All weapons
Enter "PLVRZM" as a password.

Invisibility
Enter "CRSTLCLR" as a password.

All gangs in campaign mode
Enter "LTSLTSGNGS" as a password.

Storm Ravens gang
Enter "WMNRSMRTR" as a password. Then the all-women Storm Ravens game, with laser and cloak power-up will be selectable.

Frog mode
Enter "FRGZ" as a password.

Toad gang
Enter "TDZ" as a password to replace the Queen Lords with toads.

Run Story mode
Enter "CDPLT" as a password.

Psychedelic view
Enter "CNCTHRTM" as a password.

Spinning view
Enter "HVRL" as a password.

End game
While playing the game, hold C-Left + C-Right + C-Up + C-Down.

Multi-player weapons power-up
Begin a game in multi-player mode and collect at least 15 of one weapon, except for grenades. Aim at an opponent, then press A + B to fire a powered-up version of that weapon.

Level passwords
Enter one of the following passwords to start at the corresponding level with the Nuclear Knights gang:

Level -- Name -- Password
1 Ground Zero -- FRHBMCTNTK
2 The Tunnel -- LHTSPMFRGS
3 Times Square -- NGLFFPTTFP
4 Strangle Hold Bridge -- SHPPNRVWGB
5 Bonus -- MRFFCRTKP
6 Heartland -- LPGCVBBJCF
7 Lake Shore Drive -- GLWHJCRNLK
8 State St. -- KMKJTMHRNS
9 Bonus -- FLWWFCWNRK
10 Armageddon Highway -- WSMBCPVRWS
11 Area 51 -- CGJWVRGLNM
12 Fremont St. -- KVVLHFHWTB
13 Bonus -- FCLPJRWTMP
14 Crimson Gate -- TMFNJMKJGF
15 Wharf -- PPJLJHRCVV
16 Bonus -- LNKNSWKGTH
17 Q-Zone -- WMNRSMRTR

Game Shark Codes

Invincible -- 80135763 0001
Infinite Lives -- 80135772 0001
Infinite Ammo -- 80135760 0001
Invisible -- 8013576A 0001
All Weapons -- 80135765 0001
All Levels Unlocked -- 80135767 0001
All Gangs in Campaign Mode -- 8012579A 0001
Storm Ravens Gang Unlocked -- 80135773 0001
Frog Mode -- 80135775 0001
Toad Mode -- 80135776 0001
Story Mode -- 80135770 0001
Psychedelic View -- 80135771 0001
Spinning View -- 8013576B 0001