Games like Half-Life: Opposing Force

The closest matches to Half-Life: Opposing Force: Half-Life: Blue Shift, Half-Life, Black Mesa, Crysis Warhead®, and Halo: Campaign Evolved. Ranked by imho.run from Steam co-play data, shared tags and reviews.

If Half-Life: Opposing Force is your kind of game, the closest matches are Half-Life: Blue Shift, Half-Life and Black Mesa — picked from the ranked list below. Reviewers describe it as atmospheric, immersive and nostalgic, and single out its ammo scarcity and difficulty spikes. Each pick is ranked by what players of this game also play, shared genres and tags, and review-mined similarity — not a generic popularity list.

Half-Life: Opposing Force is a 1999 first-person shooter developed by Gearbox Software and published by Valve, presenting the Black Mesa incident from the perspective of the military forces sent in to contain it. The game's core mechanics include weapon-variety, ammo-scarcity, and challenging difficulty-spikes that create a distinctly tense experience. Players take on the role of Specialist Adrian Shephard, experiencing a simultaneous-narrative that unfolds alongside events from the original game while offering new alien enemies and equipment. Reviewers highlight the gunplay as feeling more visceral than the original, while players describe the military-themed teammates as adding unexpected humor to the experience. According to player feedback, the atmosphere and immersive quality make it feel nostalgic. The game holds a 95% positive rating from 13,108 Steam reviews, costs $4.99, and runs on Steam Deck, offering roughly 6-8 hours of challenging solo content.

About Half-Life: Opposing Force: Return to the Black Mesa Research Facility as one of the military specialists assigned to eliminate Gordon Freeman. Experience an entirely new episode of single player action. Meet fierce alien opponents, and experiment with new weaponry. Named 'Game of the Year' by the Academy of Interactive Arts and Sciences.