To get the following codes to work, press ENTER during gameplay, enter the cheat at the prompt, then press ENTER again.

These codes only work on Random Map mode:

all your base are belong to us: Get 100,000 of every resource
atm: Get more gold
ahhcool: Lose the current game (can't you do that on your own?)
asus drivers: Get full map
boston rent: Have no gold
creatine: Get 1000 more iron
display cheat: Show the codes
headshot: Remove objects from map
my name is methos: Get full map and all resources
somebody set up us the bomb: Win the current game
the big dig: Have no resources
uh, smoke?: Have no wood
you said wood: Get 1000 wood