Complete the following missions to unlock these cheat options:

Mission 4 - laser sight
Mission 8 - jetpack
Mission 13 - fast walk
Mission 16 - invisibility in net games
Mission 20 - low gravity
Mission 25 - indestructible landscape
Mission 33 - Super Banana Bomb power up

Earn an Elite rank in Deathmatch mode to become invincible.
Earn a gold medal and Elite rank in all missions to get Full Wormage game options.