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Supreme Commander will accept many command line switches. You can set them up in your windows shortcut, or in your GPGnet settings under Tools -> Options -> Supreme Commander -> Command Line Arguments. This is a partial list, with some explanations.

Setting up a skirmish using command line[]

Standard switches[]

You can automaticly launch a skirmish right after launching the game. To do that, you need to specify a map. The other switches are optionals.

  • /map map_folder
Set the map
  • /faction faction
Set your faction
1 = UEF
2 = Aeon
3 = Cybran
  • /victory "victory_condition"
Set victory conditions
demoralization = Assassination
domination = Supremacy
eradication = Annihilation
sandbox = Sandbox
  • /nofog
Set fog to None
  • /blackfog
Set fog to Unexplored
  • /predeployed
Set pre-build units to On

Example: SupremeCommander.exe /map SCMP_019 /faction 3 /nofog /victory "domination"

Custom switches[]

You can create your own switches :

  1. hook lua/SinglePlayerLaunch.lua
  2. go to line 175
  3. add your switch detection code


if HasCommandLineArg("/gamespeed") then
options['GameSpeed'] = GetCommandLineArg("/gamespeed", 1)[1]

This will allow you to adjust game speed with the following switch :

  • /gamespeed "gamespeed"
Set game speed ("normal", "fast" or "adjustable")

Other switches[]

Opens the debugging tool at startup
The game engine will monitor all files on the disk, and if it detects a change, it will attempt to re-load that file immediately, if possible. This allows instant in-game updates of things like unit blueprints.
Application will exit when the game is over
/log "log_file"
Logs messages to the given file.
Disable all pre-rendered movies
Set music to Off
Set sound to Off
Do not test for minimum system requirements
Performance test (same as /map PerfTest)
/position X Y
Set the game window position to XxY
/prefs prefs_file
Uses the given file for preferences instead of Game.prefs
/profile profile
/replay "replay_file"
Plays the given replay file. Example: /replay "C:\My Replays\Me vs The Bad Guys.SupremeCommanderReplay"
/savereplay "replay_file"
Save the replay to the given file. Does not work for skirmishes started with /map map_folder - you have to hook lua/SinglePlayerLaunch.lua and edit sessionInfo.createReplay = true (in function SetupCommandLineSkirmish) for this to work.
Shows the log window at startup
/size X Y
Set a XxY resolution. Example: /size 1024 768
/windowed X Y
Start game in a window, with a XxY resolution. ex: /windowed 1024 768