TheGameSite: Tips, Cheats, Walkthroughs: N64: Battle Tanx
WEAPON UPGRADE
To improve the firepower of your weapons in a multi player game, collect 15 or more of a certain type of weapon, then press A and B simultaneously. The weapon will shoot ALL it's ammunition at once, so make sure you want to do this before trying it....
GANG SELECT DURING A CAMPAIGN
To select your gang during a Campaign, type LTSLTSGNGS in the input code screen.
GIRL POWER
Type WMNRSMRTR to unlock the Storm Ravens gang. It's an all-woman gang and the game has the cloaking and laser powerups.
STATE STREET
CJSKPFLGMH opens up the State Street, Chicago level. You'll have 10 lives, 5 goliath tanx and a nuclear weapon when you start this game. This code is not compatible with a Controller Pak.
MSTSRVV--invulnerability
CRSTLCLR--invisibility
FRGZ--plague of frogs
TDZ--Queen Lords are replaced by toads
AREA 51 WARP
In Multiplayer on Area 51, find the first UFO and destroy it. An atomic light show will appear. Find the second UFO between the upper left and upper right corner of the map. Destroy the second UFO to make another atomic light show appear. By entering the light show, you can warp from one point to the other.
HURL MODE
Enter "HVRL" as your password, then start a game. The screen will constantly spin around in circles.
SELF-DESTRUCT
While playing a Multiplayer game, press and hold all of the C Buttons simultaneously. This will destroy your tank.
TRIPPY MODE
Enter "CNCTHRTM" as your password, then start a game. The sky will constantly change colors.
UNLIMITED AMMO
Enter "LTSFBLLTS" as your password, then start a game. Your will now have unlimited ammo.
UNLIMITED LIVES
Enter "LVFRVR" as your password, then start a game. You will never run out of tanks now.