Enable the console window to be displayed by doing either of the following.
-Start the game with the +set console 1 command line parameter to allow the console window to be displayed.
-Note: This procedure requires editing a game file; creating a backup copy of the file before proceeding is recommended. With a text editor, edit either the "autoexec.cfg" or "current.cfg" file in the game directory. Add the line "console 1" to the file.
Press ~ during game play to display the console window, then type cheats 1 to enable cheat mode. Now, restart a new game by using the map e1m1a console command. Then, press ~ to display the console window again and activate the following cheats by entering the corresponding codes. Note: If you reach another level, the codes will automatically be disabled, and will need to be activated again. However, you will not have to restart your game again and can now enter the codes.
CHEAT FUNCTION - CHEAT CODE Disable cheats - cheats 0 Screenshot - screenshot God mode - god Additional health - health <100 or greater> Increase power - boost power Increase attack - boost attack Increase speed - boost speed Increase acro - boost acro Increase vitality - boost vita Increase all stats - boost all Weapon select - weapon_give_<1-10> Ultimate Gashands weapon in Episode 1 - weapon_give_gashands Unlimited ammunition - g_unlimited_ammo 1 Kill all monsters in current level - massacre Rampage mode - rampage Invisibility - notarget No clipping mode - noclip Cycle three camera views - cam_toggle Cycle all characters on level - cam_nextmon Cycle sidekicks on level - cam_nextsidekick Change game speed, 1.0 is default - timescale Level select, lose power-ups and weapons - map Level select, keep power-ups and weapons - changelevel Key command binding - bind Select active server - connect Toggle game engine messages - developer <1 or 0> Toggle clean map load with no caching - flushmap <1 or 0> Toggle rendering speed display - r_speeds <1 or 0> Toggle flat-shaded polygons - r_drawflat <1 or 0> Toggle lightmaps on surfaces - r_fullbright <1 or 0> Toggle line drawing (not available on Voodoo cards) - gl_polylines <1 or 0> Set mouse sensitivity - sensitivity <0-20> More advanced AI - sv_aiwander 1 See through walls - gl_ztrick 1 List all console commands - cmdlist