Quake 2
Type these console commands (Press the Tilte / backtick key):
God: God Mode
Give all = give's you all available weapon's and items
No target = Enemies can't see you until you shot at em
No clip = Allows walking through walls
Give rocketlauncher: Gives Rocket Launcher
Give rockets X: Gives X number of rockets
Give grenadelauncher: Gives Grenade Launcher
Give grenades X: Gives X number of grenades
Give shotgun: Give Shotgun
Give shells X: Give X number of shells
Give machinegun: Gives Machine Gun
Give bullets X: Give X number of bullets