Games like Half-Life: Blue Shift

Games like Half-Life: Blue Shift include Half-Life 2, Half-Life, Black Mesa, Half-Life: Opposing Force, and Halo: The Master Chief Collection. We matched them by the tags players give Half-Life: Blue Shift on Steam (FPS, Action, Sci-fi, Singleplayer, and Shooter): closest matches first, and among equally close ones the better-known games.