Here’s a for a game or mod titled “DOOM” — broken down by core systems, mechanics, and experience pillars.

Because doom, by its strictest definition, is the final judgment. And as long as you are breathing, as long as the scroll continues, as long as the space marine has one bullet left, the doom has not yet arrived. The verdict is pending.

The game’s aesthetic defined "doom" for a generation. Brown walls, rivers of toxic slime, growling imps, and the terrifying roar of a Cyberdemon. There was no saving the world, no love story, no dialogue. There was only you, a chain gun, and the inevitable moment you would run out of ammo. The game’s tagline could have been its Wikipedia summary: "You are a space marine, and you are doomed."