Start the game with the -dev command line parameter and press CTRL + ALT + ~ during game play to display the console window. Then, activate the following cheats by entering the corresponding codes:. Press CTRL + SHIFT + ~ again to close the console window:

CHEAT FUNCTION - CHEAT CODE
Toggle fog of war - FOW_Toggle
Remove fog of war - FOW_RevealAll
Toggle big head mode - ee_bigheadmode(<0 or 1>)
Hide Taskbar - taskbar_hide Hide
Show Taskbar - taskbar_show
Enable Statgraph - statgraph()
Show FPS when Statgraph is enabled - statgraph_channel("fps")
Set game speed; 10 is default - setsimrate()
Quit game - abortgame
Restart game - restart