All cheats for this game by platform: 3DO
The Sand
Lure your character's opponents into the mines to damage or destroy them.
The Reactor
Jump into the water and shoot at the boss. Your character can not be hit as easily when in the water. Note that damage will slowly accrue from the water. The missiles can be jumped over using a regular jump.
The Volcano
Once the floater drones start strafing your character, they can not change direction for a while. The boss will not walk through the fire that appears when a player stands too long on one of the rock "patches".
The Cyborgs
Destroy the cannons in the walls for extra power-ups (SuperShield, RapidFire, and TriAttack). This can be accomplished by running into them with the shield. Save all of the humans as quickly as possible, otherwise their stasis capsules will turn red and they will become "super" cyborgs that run at turbo speed and can knock down the player.
The Showdown
Jump on the second level and hide behind the energizer while shooting it. Doing this will allow your character to avoid fighting the floater drones (which are very tough to defeat on this level) while attempting to destroy the energizer. The Semag boss is most easily defeated by forcing him against a wall and continually hammering him with a close attack.