Games like Project Warlock II

Games like Project Warlock II include Warhammer 40,000: Boltgun, DOOM + DOOM II, DUSK, CULTIC, and Quake. We matched them by the tags players give Project Warlock II on Steam (Boomer Shooter, Shooter, Retro, Old School, and Singleplayer): closest matches first, and among equally close ones the better-known games.