Find & Edit "environment.cfg" and enter this line:
"CON_ENABLE=1" (without quotes)

cmd giveall - will give you all
cmd noclip - you can walk trough walls
cg_menu "cheatmenu" - "god mode" , "complete mission" 

See "Config.mpp"

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Find & Edit "environment.cfg" and enter this line:
"IN_HARDCORE=1" (without quotes)

For a list of commands open the file "Config.mpp"
and find the line 
Keyboard & mouse

FPS = Shift+ยง