Cheat mode:
Press [Tab] at the "Briefing" menu (with the "Start Mission" and "Buy Stuff" options. The "Cheat Codes" menu will appear. Enter one of the following codes using a gamepad or the cursor keys to activate the corresponding cheat function. Press [Esc] to exit from the "Cheat Codes" menu.
All weapons and upgrades
Press Right, Down, Right, Left.
Unlimited secondary ammunition
Press Up, Down, Down, Right, Down, Up.
Unlimited shield
Press Right, Down, Right, Down, Right.
Level select
Press Right, Up, Left, Right, Up.
+50,000 Arconium
Press Right, Left, Left, Down, Up.
All movies
Press Left, Up, Left, Right, Down.