[Menu Debug Commands]
CTRL+SHIFT+D Enables Debug Mode. Only usable in the menu. Required for the other commands.
CTRL+U Goes to level select screen.
CTRL+PLUS Changes the kid's graphic on the title screen to a smaller one with a twirlybird thing. Enables "New Game Plus".
CTRL+DEL Resets the kid's graphic on the title screen to the original larger one.
F11 Toggle player tracking. Can also be used on in-game menu.
F12
[Anywhere Debug Commands]
CTRL+F Shows the frame rate.
CTRL+A Toggles the sound.
[Game Debug Commands]
CTRL+U Equips a random set of equipment.
CTRL+M Gives 9999 money, 999 points, and a goal piece.
SHIFT+R Refill all ammo.
CTRL+MouseWheel Zoom in and out (infinitely).
CTRL+MouseMiddle Reset the zoom.
CTRL+G God mode. Invincibility, super speed, noclip, deal 100x normal damage.
CTRL+K Toggles the ability to always deal a critical hit.
CTRL+O Toggle tutorial.
CTRL+E Draws extended objects.
SHIFT+E Gives 200 experience points.
SHIFT+U Unlock several things. Obtains 99999999+99999999 experience, 400 money.
CTRL+Q Restart the level.
SHIFT+PLUS Increases brightness level.
SHIFT+MINUS Decreases brightness level.
CTRL+J Toggle Fish-Eye view.
CTRL+H Set max health.
SHIFT+N
CTRL+X
CTRL+A
CTRL+PLUS Change camera angle forward. (?)
CTRL+MINUS Change camera angle backward. (?)
CTRL+R
SHIFT+W Draw weapon organization. (?)
CTRL+W Win the current battle.
CTRL+N Ends the current wave.
SHIFT+D Toggle debug messages. (?)
CTRL+D Iterate debug messages. (?)
SHIFT+LEFT Move camera left.
SHIFT+RIGHT Move camera right.
SHIFT+UP Move camera up.
SHIFT+DOWN Move camera down.
[Other Debug Commands]
CTRL+U In most places will unlock everything for that screen.