DOOM SOULS III

All of Dark Souls III, exactly as it is, except you are the Doom Slayer and Hell came with you.

What you get

• The Praetor Suit on every starting class: helmet, suit, gauntlets with the Doom Blade, greaves.
• The DOOM arsenal at the Shrine Handmaid: Combat Shotgun, Super Shotgun, Heavy Cannon, Plasma Rifle, Rocket Launcher, Ballista, Chaingun, BFG 9000 and the Crucible, with their ammo. Guns aim and fire like crossbows. Every Dark Souls weapon still works.
• A Combat Shotgun from the start.
• DOOM demons in Lothric: the hollows of the Cemetery of Ash and the Hollow Soldiers are DOOM Eternal zombies, and the Lothric Knights are Marauders, still fighting with Dark Souls moves.
• A DOOM boss: when Iudex Gundyr falls, the Gladiator rises in his arena as a third form, with his own health bar, and DOOM Eternal's Gladiator battle music plays for the whole fight.

Single player. It plays offline on its own save file, so your normal saves are untouched.

How it works: you need Dark Souls III (1.15.2) and DOOM Eternal on Steam. Nothing from either game is in the download: the first Play builds the mashup from your own two games (a few minutes), then starts Dark Souls III. Make a new character to start as the Slayer.