You need the file "ixtlriimceourl" and the patched version of Mechcommander for these codes to work. Visit the official site to download the necessary patches.
Then, enter one of the following codes during gameplay to activate the corresponding cheat function:
Code Effect lorrie Restore ammo and armor osmium Toggle God mode reveal Full map deadeye Maximum gunnery and piloting skills Ctrl-Alt-W Wins mission Ctrl-L Maps terrain glennrocksthehouse Full salvage lordbunny Unlimited air strikes, hold B and left click to use artillery mineeyeshaveseentheglory Reveal full map
The following cheats are to be entered at the Logistics screen:
poundofflesh Adds 1,000,000 Resource Points rockandrollpeople No dropweight limit