Doom (1993)

Doom (1993) revolutionized first-person shooters with its 3D engine, selling over 10 million copies and spawning a modding community that remains active today. Its deathmatch mode introduced online multiplayer, while the shotgun's satisfying blast set a benchmark for weapon feedback. The game runs 20% faster than the average 1993 shooter, and its shareware model made it cheaper than typical retail releases, ensuring wider adoption than any contemporary rival.