Games like Half-Life: Opposing Force
If Half-Life: Opposing Force is your kind of game, the closest matches are Half-Life: Blue Shift, Half-Life and Half-Life 2 — picked from the ranked list below. Reviewers single out its atmospheric, immersive and nostalgic. 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.
Get personalized picks →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.
Players who liked Half-Life: Opposing Force also play
Steam players who put hours into Half-Life: Opposing Force also tend to own these titles — a signal called collaborative filtering. imho.run cross-references millions of library ownership patterns to surface games whose real audiences overlap, regardless of whether their genre tags match.
Half-Life: Blue Shift
WHY THIS
Shares an atmospheric mood with Half-Life: Opposing Force.
Top pick for Half-Life: Opposing Force fans by collaborative filtering across millions of Steam libraries. Shares Action with Half-Life: Opposing Force.
Made by Gearbox Software and originally released in 2001 as an add-on to Half-Life, Blue Shift is a return to the Black Mesa Research Facility in which you play as Barney Calhoun, the security guard sidekick who helped Gordon out of so many sticky situations.
Half-Life
WHY THIS
Shares an atmospheric mood with Half-Life: Opposing Force.
Second-strongest match for Half-Life: Opposing Force fans by collaborative filtering across millions of Steam libraries. Shares Action with Half-Life: Opposing Force.
Named Game of the Year by over 50 publications, Valve's debut title blends action and adventure with award-winning technology to create a frighteningly realistic world where players must think to survive. Also includes an exciting multiplayer mode that allows you to play against friends and enemies around the world.
Half-Life 2
WHY THIS
Shares an atmospheric mood with Half-Life: Opposing Force.
Third-strongest match for Half-Life: Opposing Force fans by collaborative filtering across millions of Steam libraries. Shares Action with Half-Life: Opposing Force.
Reawakened from stasis in the occupied metropolis of City 17, Gordon Freeman is joined by Alyx Vance as he leads a desperate human resistance. Experience the landmark first-person shooter packed with immersive world-building, boundary-pushing physics, and exhilarating combat.
Synthesis of Corruption
WHY THIS
Shares an atmospheric mood with Half-Life: Opposing Force.
Ranked #4 for Half-Life: Opposing Force fans by collaborative filtering across millions of Steam libraries. Shares Action with Half-Life: Opposing Force.
Emergency Protocol activated: Dark Energy Particle Synthesis failed. Now you – late and alone – must navigate a facility where science and sanity have collapsed. Face entities born from the corruption of dark energy in this atmospheric FPS-horror hybrid, where human ambition meets primal terror.
Starship Troopers: Ultimate Bug War!
WHY THIS
Shares weapon variety and a nostalgic mood with Half-Life: Opposing Force.
Ranked #5 for Half-Life: Opposing Force fans by collaborative filtering across millions of Steam libraries. Shares Action with Half-Life: Opposing Force.
Lock and load into the Starship Troopers universe and join the Mobile Infantry in the most realistic depiction of war ever made! Experience an original story in this action-packed, first-person retro shooter. Would you like to know more?
Crysis Warhead®
WHY THIS
Ranked #6 for Half-Life: Opposing Force fans by collaborative filtering across millions of Steam libraries. Shares Action with Half-Life: Opposing Force.
Pulse-racing new installment from 2007's PC Game of the Year*: Play as Sergeant Sykes and experience a whole new side of the battle. A standard combat mission behind enemy lines becomes critical when you discover your enemies have captured something of vital importance to the ensuing war.
Alien: Rogue Incursion Evolved Edition
WHY THIS
Shares an atmospheric mood with Half-Life: Opposing Force.
Ranked #7 for Half-Life: Opposing Force fans by collaborative filtering across millions of Steam libraries. Shares Action with Half-Life: Opposing Force.
A new action-horror story set in the iconic Alien universe. Play as rogue Colonial Marine Zula Hendricks, sent to investigate a blacksite on Purdan. Fight and survive using your skill, reflexes, and determination against a deadly Xenomorph incursion in this gripping first chapter of a two-part saga.
Duke Nukem 3D: 20th Anniversary World Tour
WHY THIS
Shares a nostalgic mood with Half-Life: Opposing Force.
Ranked #8 for Half-Life: Opposing Force fans by collaborative filtering across millions of Steam libraries. Shares Action with Half-Life: Opposing Force.
Frag like it’s 1996 – this time with even more asses to kick! Join the world’s greatest action hero in Duke Nukem 3D: 20th Anniversary World Tour as he saves Earth once again, kicking alien ass and saving babes across the globe along the way.
Reviewers mention these as similar to Half-Life: Opposing Force
Surfaced from review text: when other players write 'if you liked X, try Y', we catch the name and resolve it back to a Steam game.
System Shock® 2 (1999)
WHY THIS
Shares an atmospheric mood with Half-Life: Opposing Force.
Reviewers of Half-Life: Opposing Force cross-mention this title as a similar play. Shares Action with Half-Life: Opposing Force.
"Remember, it is my will that guided you here. It is my will that gave you your cybernetic implants, the only beauty in that meat you call a body. If you value that meat... you will do as I tell you." The cult classic sci-fi horror FPS-RPG has returned.
Resident Evil: Operation Raccoon City
WHY THIS
Shares an atmospheric mood with Half-Life: Opposing Force.
Reviewers of Half-Life: Opposing Force cross-mention this title as a similar play. Shares Action with Half-Life: Opposing Force.
Experience the Fear: Set in the terrifying world of Resident Evil.
Half-Life 2
WHY THIS
Shares an atmospheric mood with Half-Life: Opposing Force.
Reviewers of Half-Life: Opposing Force cross-mention this title as a similar play. Shares Action with Half-Life: Opposing Force.
Reawakened from stasis in the occupied metropolis of City 17, Gordon Freeman is joined by Alyx Vance as he leads a desperate human resistance. Experience the landmark first-person shooter packed with immersive world-building, boundary-pushing physics, and exhilarating combat.
Half-Life
WHY THIS
Shares an atmospheric mood with Half-Life: Opposing Force.
Reviewers of Half-Life: Opposing Force cross-mention this title as a similar play. Shares Action with Half-Life: Opposing Force.
Named Game of the Year by over 50 publications, Valve's debut title blends action and adventure with award-winning technology to create a frighteningly realistic world where players must think to survive. Also includes an exciting multiplayer mode that allows you to play against friends and enemies around the world.
Half-Life: Blue Shift
WHY THIS
Shares an atmospheric mood with Half-Life: Opposing Force.
Reviewers of Half-Life: Opposing Force cross-mention this title as a similar play. Shares Action with Half-Life: Opposing Force.
Made by Gearbox Software and originally released in 2001 as an add-on to Half-Life, Blue Shift is a return to the Black Mesa Research Facility in which you play as Barney Calhoun, the security guard sidekick who helped Gordon out of so many sticky situations.
Resident Evil 3
WHY THIS
Reviewers of Half-Life: Opposing Force cross-mention this title as a similar play. Shares Action with Half-Life: Opposing Force.
Jill Valentine is one of the last remaining people in Raccoon City to witness the atrocities Umbrella performed. To stop her, Umbrella unleashes their ultimate secret weapon: Nemesis! Also includes Resident Evil Resistance, a new 1 vs 4 online multiplayer game set in the Resident Evil universe.
XCOM: Enemy Unknown
WHY THIS
Shares a tense mood with Half-Life: Opposing Force.
Reviewers of Half-Life: Opposing Force cross-mention this title as a similar play.
The XCOM: Enemy Unknown - Slingshot Pack is Now Available!
Dishonored
WHY THIS
Shares an atmospheric mood with Half-Life: Opposing Force.
Reviewers of Half-Life: Opposing Force cross-mention this title as a similar play. Shares Action with Half-Life: Opposing Force.
Dishonored is an immersive first-person action game that casts you as a supernatural assassin driven by revenge. With Dishonored’s flexible combat system, creatively eliminate your targets as you combine the supernatural abilities, weapons and unusual gadgets at your disposal.
Cheaper alternatives
Games in the same vein priced at least 40% below Half-Life: Opposing Force at current Steam store prices.
POSTAL 2
WHY THIS
Priced ~80% under Half-Life: Opposing Force on Steam right now. Shares Action with Half-Life: Opposing Force.
Live a week in the life of "The POSTAL Dude"; a hapless everyman just trying to check off some chores. Buying milk, returning an overdue library book, getting Gary Coleman's autograph, what could possibly go wrong?
Blood and Bacon
WHY THIS
Priced ~80% under Half-Life: Opposing Force on Steam right now. Shares Action with Half-Life: Opposing Force.
This Co-op Shooter , has Day and Night levels, multiple maps, players will take on 25 enemy types and numerous bosses, like Gargantuan Monsters and Minibosses every 10 days as you explore, shoot and run for your life against the onslaught of porcine monstrosities.
STAR WARS™ Republic Commando™
WHY THIS
Priced ~50% under Half-Life: Opposing Force on Steam right now. Shares Action with Half-Life: Opposing Force.
You are the leader of an elite squad of Republic Commandos, your mission is to infiltrate, dominate, and ultimately, annihilate the enemy. Your squad will follow your orders and your lead, working together as a team - instinctively, intelligently, instantly. You are their leader. They are your weapon.
STAR WARS™ Jedi Knight - Jedi Academy™
WHY THIS
Priced ~50% under Half-Life: Opposing Force on Steam right now. Shares Action with Half-Life: Opposing Force.
Forge your weapon and follow the path of the Jedi Jedi Knight: Jedi Academy is the latest installment of the highly acclaimed Jedi Knight series. Take on the role of a new student eager to learn the ways of the Force from Jedi Master Luke Skywalker.
Shower With Your Dad Simulator 2015: Do You Still Shower With Your Dad
WHY THIS
Priced ~80% under Half-Life: Opposing Force on Steam right now. Shares Action with Half-Life: Opposing Force.
"Shower With Your Dad Simulator 2015: Do You Still Shower With Your Dad?" is a fast paced shower-simulation where you shower with your 8-bit dad.It's good, clean fun!
Bit Blaster XL
WHY THIS
Priced ~80% under Half-Life: Opposing Force on Steam right now. Shares Action with Half-Life: Opposing Force.
Bit Blaster XL is a fast-paced, retro arcade shoot 'em up (shmup) inspired by the classic quarter-munchers of the ‘80s. Easy to pick up, hard to put down, boost, dodge, shoot, and chase high scores in this addictive, old-school action game!
STAR WARS™ Battlefront (Classic, 2004)
WHY THIS
Priced ~50% under Half-Life: Opposing Force on Steam right now. Shares Action with Half-Life: Opposing Force.
Fight the greatest battles in the STAR WARS universe any way you want to. The choice is yours.
Kill It With Fire
WHY THIS
Priced ~48% under Half-Life: Opposing Force on Steam right now. Shares Action with Half-Life: Opposing Force.
Kill It With Fire is a first-person action game about hunting spiders and causing collateral damage.
Free alternatives
Free-to-play games that recommended players of this title also tend to enjoy.
Doki Doki Literature Club!
WHY THIS
Free-to-play pick from the same recommendation pool — no purchase to try it.
The Literature Club is full of cute girls! Will you write the way into their heart? This game is not suitable for children or those who are easily disturbed.
Life is Strange - Episode 1
WHY THIS
Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action with Half-Life: Opposing Force.
Episode 1 now FREE! Life is Strange is an award-winning and critically acclaimed episodic adventure game that allows the player to rewind time and affect the past, present and future.
Ultimate Custom Night
WHY THIS
Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action with Half-Life: Opposing Force.
Welcome to the ultimate FNAF mashup, featuring 50 selectable characters and custom difficulties!
ENA: Dream BBQ
WHY THIS
Free-to-play pick from the same recommendation pool — no purchase to try it.
Experience surreal environments and inexplicable characters as ENA in a new wild world.
Indigo Park: Chapter 1
WHY THIS
Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action with Half-Life: Opposing Force.
Explore the abandoned childhood wonder of Indigo Park! Guided by Rambley the Raccoon, help restore power to the destroyed amusement park while you run from the reason it shut down.
STRAFTAT
WHY THIS
Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action with Half-Life: Opposing Force.
STRAFTAT is a 1v1/2v2 ONLINE first person SHOOTER with quick rounds in over 350 MAPS ; Including all WEAPONS, proximity chat and 4 players FFA.
The Looker
WHY THIS
Free-to-play pick from the same recommendation pool — no purchase to try it.
You wake up, alone, on a strangely familiar island full of puzzles that will frustrate and annoy you.
Narrow it down
Head-to-head comparisons
More from Gearbox Software
Other recommendable Steam games by Gearbox Software, ranked by review count so the studio's hits land first.
Borderlands 2
WHY THIS
Another title from Gearbox Software, the studio behind Half-Life: Opposing Force. Shares Action with Half-Life: Opposing Force.
The Ultimate Vault Hunter’s Upgrade lets you get the most out of the Borderlands 2 experience.
Borderlands 3
WHY THIS
Shares an immersive mood with Half-Life: Opposing Force.
Another title from Gearbox Software, the studio behind Half-Life: Opposing Force. Shares Action with Half-Life: Opposing Force.
The original shooter-looter returns, packing bazillions of guns and a mayhem-fueled adventure! Blast through new worlds and enemies as one of four new Vault Hunters.
Borderlands 4
WHY THIS
Another title from Gearbox Software, the studio behind Half-Life: Opposing Force. Shares Action with Half-Life: Opposing Force.
Borderlands 4 is a mayhem-fueled looter shooter, jam-packed with billions of weapons, deadly enemies, and intense co-op action. Break free from a dangerous hidden planet as one of four new badass Vault Hunters.
Borderlands: The Pre-Sequel
WHY THIS
Shares a nostalgic mood with Half-Life: Opposing Force.
Another title from Gearbox Software, the studio behind Half-Life: Opposing Force. Shares Action with Half-Life: Opposing Force.
Launch into the Borderlands universe and shoot ‘n’ loot your way through a brand new adventure that rockets you onto Pandora’s moon in Borderlands: The Pre-Sequel!
Borderlands Game of the Year
WHY THIS
Another title from Gearbox Software, the studio behind Half-Life: Opposing Force. Shares Action with Half-Life: Opposing Force.
Get ready for the mind blowing insanity! Play as one of four trigger-happy mercenaries and take out everything that stands in your way! With its addictive action, frantic first-person shooter combat, massive arsenal of weaponry, RPG elements and four-player co-op, Borderlands is a breakthrough experience that challenges all the...
Half-Life: Blue Shift
WHY THIS
Shares an atmospheric mood with Half-Life: Opposing Force.
Another title from Gearbox Software, the studio behind Half-Life: Opposing Force. Shares Action with Half-Life: Opposing Force.
Made by Gearbox Software and originally released in 2001 as an add-on to Half-Life, Blue Shift is a return to the Black Mesa Research Facility in which you play as Barney Calhoun, the security guard sidekick who helped Gordon out of so many sticky situations.
Borderlands Game of the Year Enhanced
WHY THIS
Another title from Gearbox Software, the studio behind Half-Life: Opposing Force. Shares Action with Half-Life: Opposing Force.
Discover the original co-op shooter-looter, crammed with new enhancements! As one of 4 trigger-happy mercenaries with RPG progression, equip bazillions of guns to take on the desert planet Pandora.
Tiny Tina's Wonderlands
WHY THIS
Another title from Gearbox Software, the studio behind Half-Life: Opposing Force. Shares Action with Half-Life: Opposing Force.
Embark on an epic adventure full of whimsy, wonder, and high-powered weaponry! Roll your own multiclass hero then shoot, loot, slash, and cast on a quest to stop the Dragon Lord.
Plays great on Steam Deck
Valve-Verified or Playable picks from the similar pool — ready to go on Deck out of the box.
Half-Life
WHY THIS
Shares an atmospheric mood with Half-Life: Opposing Force.
Deck Verified — runs on Steam Deck out of the box. Shares Action with Half-Life: Opposing Force.
Named Game of the Year by over 50 publications, Valve's debut title blends action and adventure with award-winning technology to create a frighteningly realistic world where players must think to survive. Also includes an exciting multiplayer mode that allows you to play against friends and enemies around the world.
Half-Life 2
WHY THIS
Shares an atmospheric mood with Half-Life: Opposing Force.
Deck Verified — runs on Steam Deck out of the box. Shares Action with Half-Life: Opposing Force.
Reawakened from stasis in the occupied metropolis of City 17, Gordon Freeman is joined by Alyx Vance as he leads a desperate human resistance. Experience the landmark first-person shooter packed with immersive world-building, boundary-pushing physics, and exhilarating combat.
Starship Troopers: Ultimate Bug War!
WHY THIS
Shares weapon variety and a nostalgic mood with Half-Life: Opposing Force.
Deck Verified — runs on Steam Deck out of the box. Shares Action with Half-Life: Opposing Force.
Lock and load into the Starship Troopers universe and join the Mobile Infantry in the most realistic depiction of war ever made! Experience an original story in this action-packed, first-person retro shooter. Would you like to know more?
Alien: Rogue Incursion Evolved Edition
WHY THIS
Shares an atmospheric mood with Half-Life: Opposing Force.
Deck Verified — runs on Steam Deck out of the box. Shares Action with Half-Life: Opposing Force.
A new action-horror story set in the iconic Alien universe. Play as rogue Colonial Marine Zula Hendricks, sent to investigate a blacksite on Purdan. Fight and survive using your skill, reflexes, and determination against a deadly Xenomorph incursion in this gripping first chapter of a two-part saga.
Duke Nukem 3D: 20th Anniversary World Tour
WHY THIS
Shares a nostalgic mood with Half-Life: Opposing Force.
Deck Verified — runs on Steam Deck out of the box. Shares Action with Half-Life: Opposing Force.
Frag like it’s 1996 – this time with even more asses to kick! Join the world’s greatest action hero in Duke Nukem 3D: 20th Anniversary World Tour as he saves Earth once again, kicking alien ass and saving babes across the globe along the way.
Frequently asked about Half-Life: Opposing Force
- Does Half-Life: Opposing Force run on Steam Deck?
- Half-Life: Opposing Force is rated Playable on Steam Deck — it runs, but expect some manual adjustments (control remapping, text size, or graphics settings) for the best experience.
- How much does Half-Life: Opposing Force cost?
- Half-Life: Opposing Force is listed on Steam at 4.99 USD (current store price; Steam sales may reduce this temporarily).
- Does Half-Life: Opposing Force have multiplayer or co-op?
- Yes — Half-Life: Opposing Force supports multi-player play according to its Steam store listing (Multi-player).
- What games are most similar to Half-Life: Opposing Force?
- Based on Steam play patterns and shared genres/tags, the games most often recommended alongside Half-Life: Opposing Force are Half-Life: Blue Shift, Half-Life, Half-Life 2.
- Who developed Half-Life: Opposing Force?
- Half-Life: Opposing Force was developed by Gearbox Software and published by Valve.
imho.run ranks Steam game alternatives using a mix of collaborative filtering (ALS / iALS / EASE / LightGCN), content scoring over genres, categories, Steam tags, developers, and publishers, plus AI-extracted vibes mined from review text. The page above is generated in seed mode anchored on Half-Life: Opposing Force.
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