Half Life: Opposing Force Original levels You can play all the Half-Life levels that Gordon Freeman went through as Adrion Shepard, but in the lab none of the scientists will talk to you. Hidden audio Approach the Boss of Opposing Force to hear backwards audio composed of the phrase "To win the game you must kill me Randy Pitchford" when played correctly. Randy Pitchford is the leader of the development team at Gearbox Software. Cheat Codes Load the game with the "hl.exe -dev -console -game gearbox" command line. Then while playing a game, press ~ to display the console and enter one of the following codes to activate the corresponding cheat function: RESULT CHEAT CODE God mode /god All weapons with full ammo /impulse 101 No clipping mode /noclip Adjust gravity sv_gravity [-999 - 999999] Spawn indicated item /give [item name] Spawn indicated weapon /give weapon_[weapon name] Spawn indicated ammo /give ammo_[ammo name] Map select /map [map name] Weapon names Use one of the following weapon names with the "/give weapon_[weapon name]" code: Weapon Weapon name .357 Magnum 357 9mm Assault Rifle 9mmar 9mm Handgun 9mmhandgun Crossbow crossbow Crowbar crowbar Desert Eagle eagle Displacer displacer Egon Gun egon Gauss Gun gauss Grapple grapple Hand Granate handgrenade Hornet Gun hornetgun Knife knife Laser Tripmine tripmine M249 SAW m249 M40A Sniper Rifle sniperrifle Pipewrench pipewrench Rocket Thrower rpg Satchel Charge satchel Shock Rifle shockrifle Shotgun shotgun Snark snark Spore Launcher sporelauncher Ammo names Use one of the following ammo names with the "/give ammo_[ammo name]" code: Ammo type Ammo name .357 Magnum 357 9mm Assault Rifle 9mm 9mm Handgun 9mm Crossbow crossbow Egon Gun egonclip Gauss Gun gaussclip M249 SAW 556 M40A Sniper Rifle 762 Rocket Thrower rpgclip Shotgun buckshot Spore Launcher spore Map names Use the following map names with the "/map [map name]" code: Boot Camp ofbooto ofboot1 ofboot2 ofboot2 ofboot3 ofboot4 Regular game of0a0 of1a1 of1a2 of1a3 of1a4 of1a4b of1a5 of1a5b of2a1 of2a1b of2a2 of2a3 of2a4 of2a5 of2a5b of3a1 of3a1b of3a2 of3a3 of3a4 of3a5 of3a6 of4a1 of4a2 of4a3 of4a4 of4a5 of5a1 of5a2 of5a3 of5a4 of6a1 of6a2 of6a3 of6a4 of6a4b 0f6a5 of7a0