Rogue Trooper

Rogue Trooper cheat codes: 
Level select:
Play any level and complete it. Then, quit the game and restart it.
The level you just completed will now be unlocked at the "Cheats" menu.

All weapons and upgrades
Successfully complete the game. Instead of starting a new game,
use the "Level select" cheat and start on the first level to keep
all your weapons and upgrades from the previous game.

Extreme Ragdoll
Beat Normal Difficulty.

Hippy Blood
Beat Normal Difficulty.

Low Gravity Ragdoll
Beat Normal Difficulty.