Doom, the epochal FPS game from id Software, has its original version, outlined by co-developer Tom Hall in the original "Doom Bible" design document, rebuilt, relaunched, and made fully playable thanks to a new Doom mod that restores the 1992 version of what could have been.
RELATED LINKS:
Doom mod lets you play Doom Eternal via id Software's original 90s FPS
Doom mod is the "epic grand finale" FPS players have been waiting for
Half-Life Doom mod is a brutal follow up to Gearbox FPS Opposing Force