Press M + S + V at the main menu. Then enter one of the following.
console Press ~ to display console window
god God Mode for all units
notgod Disable God mode
gimme maps Unlock all campaign missions in custom game menu
the new generation of rts-games Secret Sabotage Mission unlocked in custom game menu
flashlight Flashlight GUI
from massive with love Alternate textures
If you go into the credits and click repeatedly on the fish, it will explode and
you hear children laugh and say "messy".
Thanks to Revolution readers The Commander and Hungrypete!