Make sure Skirmish Mode Cheats -> ON.
Cheat Codes for Supreme Commander Free Download
During the game press:
ALT + [N] – God Mode
CTRL + ALT + [B] – 10000 total
ALT + [T] – Teleport the selected unit
CTRL + [K] – Kill the selected unit
ALT + [F2] – Spawn Unit
CTRL + [N] – Unit Name
ALT + [LEFT CLICK UNIT] – Change the enemy
DestroyAll – destroy all units and buildings
KillAll – destroy all units and buildings
KillSelectedUnits – Kill the selected unit or building
SetFocusArmyPlayer – change control over the game
ai_freebuild – Proceedings and studies at the same time are finished
ai_instabuild – free postings and research
RenameUnit – give a name for the selected unit
[Alt] + [T] – teleportation of the selected unit to the place of the specified cypcop
[Ctrl] + [Alt] + [B] – will increase the capacity by 10000 for all lagers
[Ctrl] + [Alt] + [Z] – show the whole map
[Alt] + [N] – units do not receive damage
