Bonus Scheme 1
Successfully complete all training modes with at least a Bronze rank to unlock "Bonus Scheme 1" in multi-player mode.

Cheat mode
Complete one of the following goals to unlock the corresponding feature, which may be enabled at the weapons or game options screen:

Result Goal
Laser sight Complete mission 4
Jetpack Complete mission 8
Fast walk Complete mission 13
Invisibility in net games Complete mission 16
Low gravity Complete mission 20
Indestructible landscape Complete mission 25
Super Banana Bomb power-up Complete mission 33
Full Wormage game options Gold medal and Elite rank in all