Bonuses
Successfully complete the following levels in mission mode to unlock the corresponding bonus:
3 - Advanced - GLG40MM Pipe Bomb Launcher weapon
3 - Intermediate - Bonus level
4 - Advanced - Icon Bomb weapon
5 - Advanced - Proofer playable character
5 - Intermediate - Scarpin playable character
7 - Advanced - Bonus level
8 - Advanced - DICW weapon
8 - Novice - Commander playable character
9 - Advanced - Bonus level
10 - Advanced - Enemy B.A.T. weapon and D.K. playable character
11 - Advanced - PSG-1 weapon
11 - Intermediate - Siba playable character
12 - Advanced - Bonus level
12 - Intermediate - Ump Machine Gun weapon
13 - Advanced - SPAS12 weapon
14 - Advanced - Bonus level
14 - Novice - Shinobi playable character
15 - Advanced - Guided Missile 2 weapon and Salamander and Dr. K playable character
15 - Novice - Bonus level
Sound and movie modes
Successfully complete mission mode under the novice, intermediate, and advanced difficulty settings to unlock the sound mode and movie mode options.
Additional colors
Complete the advanced training in the arcade mode to unlock colors for that character. Note: This will not work for every character.