Press [~] during game play and type at the console window:

• thetrooper: god mode
• imnotafraidtofight: god mode for demo version
• sunandsteel: Reload Ammunition
• diewithyourbootson: unlimited ammunition
• gamma 1234567890: Colored smoke

Press [~] during game play and type "stilllife" at the console window.

Press [~] during game play and type "revelation" at the console window.

• /d -- Reload resources from directory rather than PIF file
• /r -- Record demo in 1P mode
• /p filename -- Play demo
• /s -- Save scores
• /sys -- System information
• /? -- Display command line parameter options

While playing, hit the ~TILDE key and type "gamma 123".