Mercs of Hell

Play DOOM and DOOM II as one of Team Fortress 2's nine mercenaries, or as Gordon Freeman.

Pick your character when the game starts and switch any time with the , (comma) key. DOOM keeps its maps, monsters and music. Your weapons, viewmodels, sounds, voice lines, HUD and pickups come from your own copies of Team Fortress 2 and Half-Life.

The mercenaries (stock loadouts)

• Scout: Scattergun, Pistol, Bat; jumps again in mid-air
• Soldier: Rocket Launcher, Shotgun, Shovel; rocket jumps
• Pyro: Flame Thrower that sets monsters on fire, Shotgun, Fire Axe
• Demoman: Grenade Launcher, Stickybomb Launcher (alt-fire detonates), Bottle
• Heavy: Minigun that spins up (alt-fire keeps it spinning), Shotgun, Fists
• Engineer: Shotgun, Pistol, Wrench that repairs, Construction PDA that builds TF2's sentry gun for 130 metal
• Medic: Syringe Gun, Medi Gun, Bonesaw. With no teammates in single player, the Medi Gun drains a monster and heals you (overheal), building an ÜberCharge you pop with alt-fire
• Sniper: Sniper Rifle with TF2's scope, charged shots and headshots, SMG, Kukri
• Spy: Revolver, Knife that kills from behind; alt-fire cloaks

Gordon Freeman

Crowbar and 9mm pistol, then the .357, shotgun, MP5 with grenades, crossbow, RPG, Gauss gun (hold alt-fire to charge) and Gluon gun, found where DOOM keeps its weapons. HEV suit armor and the suit's voice.

Each game's own look

• TF2's HUD (class figure, health cross, ammo, Über/cloak/charge/sentry meters) or Half-Life's orange HUD
• DOOM's pickups become TF2 medkits and ammo packs for the mercenaries, and Half-Life health kits, batteries, ammo and weapons for Gordon

Single player. Controls: comma to change character, R to reload, right mouse for alt-fire.

You need DOOM + DOOM II, Team Fortress 2 and Half-Life installed. Melty installs GZDoom, and before the first start it runs the mashup's setup, which reads TF2 and Half-Life from your own installs. Nothing from any of the three games is in the download, and no game folder is changed.

Team Fortress 2 and Half-Life are by Valve; DOOM and DOOM II by id Software; GZDoom by the GZDoom team. A free fan mashup, not affiliated with them. The setup program uses open-source Rust libraries (listed in THIRD-PARTY-NOTICES.txt).