freedoom / freedoom

Freedoom is an entirely free software game based on the Doom engine.

nftechie / doomfly

Fly-connectome simulation controlling a live Doom arena, with experimental neural plasticity, spectator UI, and scientific validation reports.

cedardb / sqldoom

A purely SQL-based reimplementation of the original 1993 DOOM running on CedarDB

bailo167 / awesome-game-mashups

Curated list of games rebuilt inside other games — cross-game mechanics, engine/runtime mashups, playable ports, and verified viral projects.