Games like Half-Life: Opposing Force on Steam

For those who prefer not to search, lists of the most played, top deals and best free games like Half-Life: Opposing Force are available at the bottom of the page.

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Viscerafest

Viscerafest is a Sci-Fi Fantasy Singleplayer Arena FPS with minor Collectathon elements. Fight through hordes of aliens and eldritch monstrosities wielding a slew of powerful weapons, juggling your resources, and exploring over 23 intricately designed hand-crafted levels.

Similarity 55%
Price -89% 2.20€
Rating 8.2
Release 14 Apr 2025

Borderlands Game of the Year Enhanced

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.

Similarity 55%
Price -78% 6.66€
Rating 8.4
Release 31 Aug 2023

RAID: World War II

RAID: World War II is an action-packed four player cooperative shooter set during a time when the Nazi war machine was still winning, and hope was in short supply.

Similarity 55%
Price 9.99€
Rating 6.2
Release 26 Sep 2017

Super 3-D Noah's Ark

Fast paced, first person adventure aboard Noah's ark!

Similarity 55%
Price 9.75€
Rating 8.3
Release 23 Jun 2015

Axiom Verge

Explore and uncover the mystery of a surreal alien world by blasting aliens and glitching your environment in this intense retro side-scrolling action/adventure.

Similarity 55%
Price -83% 3.06€
Rating 8.8
Release 14 May 2015

Dead Effect

Fight for your life in the INDIE SCI-FI FPS game fit for both casual and hard-core gamers with a passion for hunting down hordes of zombies. Prepare yourselves for the incoming nightmare!

Similarity 55%
Price 4.99€
Rating 7.1
Release 17 Dec 2014

Brothers in Arms: Hell's Highway™

Brothers in Arms Hell's Highway brings the critically acclaimed squad-based WWII shooter into the next generation of gaming with amazing graphics and sound, new cutting-edge gameplay features and a totally redesigned online component.

Similarity 55%
Price 9.99€
Rating 8.7
Release 08 Oct 2008

Tom Clancy's Ghost Recon®

Eastern Europe, 2008. War has broken out on the borders of Russia and the fate of the world hangs in the balance. That's when the call goes out for the Ghosts—an elite handful of specially trained Green Berets, armed with the latest technology and trained to use the deadliest weapons.

Similarity 55%
Price 9.99€
Rating 8.8
Release 15 Jul 2008

Warhammer 40,000: Battle Sister

Welcome to the grim darkness of the far future! Experience the war-torn universe of Warhammer 40,000 brought into jaw-dropping, visceral reality for the first time in VR. Immerse yourself in a gripping, action-filled story spanning the galaxy.

Similarity 55%
Price 19.99€
Rating 6.6
Release 08 Mar 2022

Aliens vs. Ghosts

Use Nukes, Electricity, Heat Rays and powerful Minions in this wave-based first person shooter providing endless hours of Ghost-slaying entertainment, solo or Co-Op. Only Ghosts stand in the way of your invasion of Earth.

Similarity 55%
Price 7.31€
Rating 8.4
Release 06 Jul 2022

Silica

Silica blends FPS and RTS in epic, photorealistic battles. Choose to fight on the ground or command from above as humans or aliens. Dive into thrilling multiplayer combat or master strategic command. Are you ready to survive and conquer?

Similarity 55%
Price 19.99€
Rating 7.4
Release 03 May 2023

Trepang2

Become the ultimate badass in Trepang2: A gory, action-packed FPS set in the near future. Unleash all hell on your enemies, dodge bullets and leave a trail of destruction in this hardcore and frenetic shooter.

Similarity 55%
Price -85% 4.59€
Rating 9.1
Release 21 Jun 2023

Scorn

Scorn is an atmospheric first-person horror adventure game set in a nightmarish universe of odd forms and somber tapestry.

Similarity 55%
Price -88% 4.65€
Rating 7.5
Release 14 Oct 2022

Tom Clancy's Ghost Recon® Wildlands

Create a team with up to 3 friends in Tom Clancy’s Ghost Recon® Wildlands and enjoy the ultimate military shooter experience set in a massive, dangerous, and responsive open world.

Similarity 55%
Price 49.99€
Rating 7.9
Release 06 Mar 2017

Wrack

Wrack is all about action - spectacular action! The addictive kill chain system encourages you to mow down as many enemies in a short period of time as possible. No hiding - keep your chain going by getting out there and kicking some alien ass!

Similarity 55%
Price 9.99€
Rating 6.7
Release 30 Sep 2014

Insurgency

Take to the streets for intense close quarters combat, where a team's survival depends upon securing crucial strongholds and destroying enemy supply in this multiplayer and cooperative Source Engine based experience.

Similarity 55%
Price -66% 4.25€
Rating 9.1
Release 22 Jan 2014

Tom Clancy's Ghost Recon: Future Soldier™

In Ghost Recon Future Soldier join an elite team of highly trained, cut-throat special-ops soldiers. Armed to the teeth with unrivalled combat technology, Ghost Recon takes you to the globe’s most deadly warzones to hunt down the highest value targets.

Similarity 55%
Price 14.99€
Rating 6.8
Release 27 Jun 2012

America's Army: Proving Grounds

America’s Army: Proving Grounds is the official game of the U.S. Army and part of the highly acclaimed America’s Army game series. This free military game focuses on small unit tactical maneuvers and puts you to the test in a wide variety of new America’s Army maps and AA fan favorites.

Similarity 55%
Price Free to play
Rating 7.7
Release 29 Aug 2013

Hard Reset Extended Edition

Over-the-top destruction, loads of enemies & a beautifully realized cyberpunk setting. Hard Reset is here to shake up the shooter scene. Try the demo now.

Similarity 55%
Price -90% 1.49€
Rating 7.9
Release 12 Jul 2012

Riven (1997)

Released in 1997 as the original sequel to Myst, one of the best-selling puzzle adventure games of all time. Prepare to enter a world "torn asunder" by timeless, unresolved conflicts -- a world of incomparable beauty, intrigue, and betrayal.

Similarity 55%
Price 5.89€
Rating 8.5
Release 04 Aug 2010

Sniper: Ghost Warrior 2

Sniper: Ghost Warrior 2 takes the bulls-eye precision of its predecessor to new and exciting heights!

Similarity 55%
Price 9.99€
Rating 7.4
Release 11 Mar 2013

Operation Flashpoint: Dragon Rising

Operation Flashpoint: Dragon Rising is a game about a fictitious conflict on one of the Sakhalin islands.

Similarity 55%
Price -49% 5.06€
Rating 6.7
Release 06 Oct 2009

NecroVision

War is Hell. NecroVision is a first-person shooter that takes gamers across the frantic battlegrounds of World War I and into a dark underworld of vampires, demons and dark magic.

Similarity 55%
Price -85% 0.74€
Rating 6.6
Release 20 May 2009

Thief: Deadly Shadows

You are Garrett, the master thief. Rarely seen and never caught, Garrett is the best that ever was. Able to sneak past any guard, pick any lock, and break into the most ingeniously secured residences. Garrett steals from the wealthy and gives to himself, making his living in the dark and foreboding City.

Similarity 55%
Price -76% 2.13€
Rating 7.8
Release 29 Mar 2007

Most played games like Half-Life: Opposing Force on Steam

Take a look at the top games like Half-Life: Opposing Force that are currently attracting the largest player bases on the Steam platform, as of May 01st 2025.

1. Red Dead Redemption 2

Similarity 59% Winner of over 175 Game of the Year Awards and recipient of over 250 perfect scores, RDR2 is the epic tale of outlaw Arthur Morgan and the infamous Van der Linde gang, on the run across America at the dawn of the modern age. Also includes access to the shared living world of Red Dead Online. Red Dead Redemption 2 is a open world, story rich and western game developed and published by Rockstar Games. Released on December 05th 2019 has received 717,516 reviews of which 661,377 were positive and 56,139 were negative resulting in an impressive rating of 9.1 out of 10. The game has hit the top spot as the #1 most played game like Half-Life: Opposing Force, thanks to its 23,553 peak concurrent players over the last day.
9.1
661,377
56,139

23,553
players

2. Cyberpunk 2077

Similarity 57% Cyberpunk 2077 is an open-world, action-adventure RPG set in the dark future of Night City — a dangerous megalopolis obsessed with power, glamor, and ceaseless body modification. Cyberpunk 2077 is a cyberpunk and open world game developed and published by CD PROJEKT RED. Released on December 09th 2020 has received 834,940 reviews of which 703,079 were positive and 131,861 were negative resulting in a rating of 8.4 out of 10. While seeing 17,917 players online at once in the last 24 hours, this game is currently ranked #2 among games like Half-Life: Opposing Force based on player count.
8.4
703,079
131,861

17,917
players

3. Fallout 4

Similarity 64% Bethesda Game Studios, the award-winning creators of Fallout 3 and The Elder Scrolls V: Skyrim, welcome you to the world of Fallout 4 – their most ambitious game ever, and the next generation of open-world gaming. Fallout 4 is a open world, post-apocalyptic and singleplayer game developed by Bethesda Game Studios and published by Bethesda Softworks. Released on November 09th 2015 has received 390,364 reviews of which 324,290 were positive and 66,074 were negative resulting in a rating of 8.2 out of 10. While seeing 12,186 players online at once in the last 24 hours, this game is currently ranked #3 among games like Half-Life: Opposing Force based on player count.
8.2
324,290
66,074

12,186
players

4. Halo: The Master Chief Collection

Similarity 80% The Master Chief’s iconic journey includes six games, built for PC and collected in a single integrated experience. Whether you’re a long-time fan or meeting Spartan 117 for the first time, The Master Chief Collection is the definitive Halo gaming experience. Halo: The Master Chief Collection is a great soundtrack, fps and classic game developed by 343 Industries, Splash Damage, Ruffian Games, Bungie and Saber Interactive and published by Xbox Game Studios. Released on December 03rd 2019 has received 240,453 reviews of which 222,169 were positive and 18,284 were negative resulting in an impressive rating of 9.1 out of 10. With 4,897 concurrent players in the last 24 hours, the game currently holds the #4 spot among the most played games like Half-Life: Opposing Force.
9.1
222,169
18,284

4,897
players

5. Fallout: New Vegas

Similarity 63% Welcome to Vegas. New Vegas. Enjoy your stay! Fallout: New Vegas is a open world, rpg and post-apocalyptic game developed by Obsidian Entertainment and published by Bethesda Softworks. Released on October 21st 2010 has received 226,078 reviews of which 217,239 were positive and 8,839 were negative resulting in an impressive rating of 9.5 out of 10. With 4,346 concurrent players in the last 24 hours, the game currently holds the #5 spot among the most played games like Half-Life: Opposing Force.
9.5
217,239
8,839

4,346
players

6. Call of Duty®: Black Ops III

Similarity 62% Call of Duty®: Black Ops III Zombies Chronicles Edition includes the full base game plus the Zombies Chronicles content expansion. Call of Duty®: Black Ops III is a multiplayer, zombies and fps game developed by Treyarch and Aspyr (Mac) and published by Aspyr (Mac) and Activision. Released on November 05th 2015 has received 213,641 reviews of which 180,012 were positive and 33,629 were negative resulting in a rating of 8.3 out of 10. With 4,001 concurrent players in the last 24 hours, the game currently holds the #6 spot among the most played games like Half-Life: Opposing Force.
8.3
180,012
33,629

4,001
players

7. S.T.A.L.K.E.R. 2: Heart of Chornobyl

Similarity 56% Discover the vast Chornobyl Exclusion Zone full of dangerous enemies, deadly anomalies and powerful artifacts. Unveil your own epic story as you make your way to the Heart of Chornobyl. Make your choices wisely, as they will determine your fate in the end. S.T.A.L.K.E.R. 2: Heart of Chornobyl is a open world, fps and post-apocalyptic game developed by GSC Game World and published by GSC Game World (worldwide), SEGA (Japan) and 4divinity (China and South East Asia). Released on November 20th 2024 has received 111,487 reviews of which 90,084 were positive and 21,403 were negative resulting in a rating of 8.0 out of 10. With 2,548 concurrent players in the last 24 hours, the game currently holds the #7 spot among the most played games like Half-Life: Opposing Force.
8.0
90,084
21,403

2,548
players

8. Halo Infinite

Similarity 68% From one of gaming's most iconic sagas, Halo is bigger than ever. Featuring an expansive open-world campaign and a dynamic free to play multiplayer experience. Halo Infinite is a free to play, fps and multiplayer game developed by 343 Industries and published by Xbox Game Studios. Released on November 15th 2021 has received 176,400 reviews of which 123,072 were positive and 53,328 were negative resulting in a rating of 6.9 out of 10. With 2,429 concurrent players in the last 24 hours, the game currently holds the #8 spot among the most played games like Half-Life: Opposing Force.
6.9
123,072
53,328

2,429
players

9. Mass Effect™ Legendary Edition

Similarity 56% The Mass Effect™ Legendary Edition includes single-player base content and over 40 DLC from the highly acclaimed Mass Effect, Mass Effect 2, and Mass Effect 3 games, including promo weapons, armors, and packs — remastered and optimized for 4K Ultra HD. Mass Effect™ Legendary Edition is a story rich, rpg and choices matter game developed by BioWare and published by Electronic Arts. Released on May 14th 2021 has received 55,425 reviews of which 50,469 were positive and 4,956 were negative resulting in a rating of 9.0 out of 10. With 2,369 concurrent players in the last 24 hours, the game currently holds the #9 spot among the most played games like Half-Life: Opposing Force.
9.0
50,469
4,956

2,369
players

10. Metro 2033 Redux

Similarity 64% In 2013 the world was devastated by an apocalyptic event, annihilating almost all mankind and turning the Earth's surface into a poisonous wasteland. A handful of survivors took refuge in the depths of the Moscow underground, and human civilization entered a new Dark Age. The year is 2033. Metro 2033 Redux is a post-apocalyptic, fps and atmospheric game developed by 4A Games and published by Deep Silver. Released on August 27th 2014 has received 103,741 reviews of which 94,593 were positive and 9,148 were negative resulting in a rating of 9.0 out of 10. With 2,217 concurrent players in the last 24 hours, the game currently holds the #10 spot among the most played games like Half-Life: Opposing Force.
9.0
94,593
9,148

2,217
players

Best deals on games like Half-Life: Opposing Force on Steam

Discover fantastic savings with the best discounts on a variety of games like Half-Life: Opposing Force available on Steam right now, updated on May 01st 2025. Looking for even more deals? Use the search filters to explore a wider range of discounted games like Half-Life: Opposing Force.

1. My Friendly Neighborhood

Similarity 55% Something scary is happening with everyone's favorite Saturday morning puppet show, The Friendly Neighborhood! Play as Gordon, a repairman sent to get to the bottom of this disturbing dilemma. Fend off puppets and solve puzzles in this survival horror adventure. My Friendly Neighborhood is a singleplayer, survival horror and funny game developed by John Szymanski and Evan Szymanski and published by DreadXP. Released on July 18th 2023 has received 2,732 reviews of which 2,613 were positive and 119 were negative resulting in an impressive rating of 9.1 out of 10. Featuring a massive 96% discount, this game currently holds the #1 spot in the best deals for games like Half-Life: Opposing Force.
9.1
2,613
119

-96% 32.50€ 1.30€

2. Prodeus

Similarity 68% Prodeus is a first-person shooter of old, re-imagined using modern rendering techniques and technology. Experience the quality you’d expect from a modern AAA game, designed with retro aesthetics and gameplay that invoke the tech-imposed limits of older hardware. Prodeus is a boomer shooter, fps and retro game developed by Bounding Box Software Inc. and published by Humble Games. Released on September 23rd 2022 has received 7,473 reviews of which 6,947 were positive and 526 were negative resulting in an impressive rating of 9 out of 10. Thanks to its incredible 95% discount, this game is now the #2 best deal in games like Half-Life: Opposing Force.
9
6,947
526

-95% 25.00€ 1.25€

3. Borderlands: The Pre-Sequel

Similarity 58% 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: The Pre-Sequel is a looter shooter, co-op and fps game developed by 2K Australia, Gearbox Software and Aspyr (Linux) and published by Aspyr (Linux) and 2K. Released on October 16th 2014 has received 41,307 reviews of which 33,563 were positive and 7,744 were negative resulting in a rating of 8 out of 10. Thanks to its incredible 93% discount, this game is now the #3 best deal in games like Half-Life: Opposing Force.
8
33,563
7,744

-93% 42.00€ 2.94€

4. F.E.A.R. 3

Similarity 64% F.E.A.R. 3 delivers all the hallmarks that define the F.E.A.R. brand: terrifying paranormal experience, frenetic combat and a dramatic storyline. F.E.A.R. 3 is a fps, horror and co-op game developed by Day 1 Studios and published by Warner Bros. Interactive Entertainment. Released on June 21st 2011 has received 12,665 reviews of which 9,019 were positive and 3,646 were negative resulting in a rating of 7 out of 10. Currently offered at a significant 93% discount, this title has earned the #4 position in the best deals for games like Half-Life: Opposing Force.
7
9,019
3,646

-93% 19.71€ 1.38€

5. INDUSTRIA

Similarity 63% Embark on a gripping journey in INDUSTRIA, an atmospheric FPS set in Cold War-era East Berlin. Unravel the secrets of a mysterious parallel dimension while searching for a missing colleague. Explore a haunting reality where the truth awaits. Discover the dark past that lies beyond. INDUSTRIA is a fps, action and sci-fi game developed by Bleakmill and published by Headup. Released on September 30th 2021 has received 3,200 reviews of which 2,273 were positive and 927 were negative resulting in a rating of 6.9 out of 10. Currently offered at a significant 93% discount, this title has earned the #5 position in the best deals for games like Half-Life: Opposing Force.
6.9
2,273
927

-93% 20.29€ 1.42€

6. Marvel's Guardians of the Galaxy

Similarity 54% Fire up a wild ride across the cosmos with a fresh take on Marvel’s Guardians of the Galaxy. In this action-adventure game, you are Star-Lord leading the unpredictable Guardians from one explosion of chaos to the next. You got this. Probably. Marvel's Guardians of the Galaxy is a singleplayer, story rich and action game developed by Eidos-Montréal and published by Eidos Interactive Corp.. Released on October 26th 2021 has received 38,718 reviews of which 36,453 were positive and 2,265 were negative resulting in an impressive rating of 9.2 out of 10. Currently offered at a significant 92% discount, this title has earned the #6 position in the best deals for games like Half-Life: Opposing Force.
9.2
36,453
2,265

-92% 62.38€ 4.99€

7. Metro 2033 Redux

Similarity 64% In 2013 the world was devastated by an apocalyptic event, annihilating almost all mankind and turning the Earth's surface into a poisonous wasteland. A handful of survivors took refuge in the depths of the Moscow underground, and human civilization entered a new Dark Age. The year is 2033. Metro 2033 Redux is a post-apocalyptic, fps and atmospheric game developed by 4A Games and published by Deep Silver. Released on August 27th 2014 has received 103,741 reviews of which 94,593 were positive and 9,148 were negative resulting in a rating of 9.0 out of 10. Currently offered at a significant 92% discount, this title has earned the #7 position in the best deals for games like Half-Life: Opposing Force.
9.0
94,593
9,148

-92% 18.75€ 1.50€

8. Fobia - St. Dinfna Hotel

Similarity 57% Explore a decadent hotel across different timelines and uncover the dark history of a fanatical cult and your role in their plans. Fobia - St. Dinfna Hotel is a indie, survival horror and violent game developed by Pulsatrix Studios and published by Maximum Entertainment. Released on June 28th 2022 has received 1,922 reviews of which 1,646 were positive and 276 were negative resulting in a rating of 8.2 out of 10. Currently offered at a significant 91% discount, this title has earned the #8 position in the best deals for games like Half-Life: Opposing Force.
8.2
1,646
276

-91% 26.00€ 2.34€

9. Deus Ex: Mankind Divided

Similarity 64% Now an experienced covert operative, Adam Jensen is forced to operate in a world that has grown to despise his kind. Armed with a new arsenal of state-of-the-art weapons and augmentations, he must choose the right approach, along with who to trust, in order to unravel a vast worldwide conspiracy. Deus Ex: Mankind Divided is a cyberpunk, stealth and rpg game developed by Eidos Montreal and Feral Interactive (Linux) and published by Feral Interactive (Linux), Feral interactive (Mac) and Eidos Interactive Corp.. Released on August 23rd 2016 has received 40,713 reviews of which 30,916 were positive and 9,797 were negative resulting in a rating of 7.5 out of 10. Currently offered at a significant 91% discount, this title has earned the #9 position in the best deals for games like Half-Life: Opposing Force.
7.5
30,916
9,797

-91% 30.56€ 2.75€

10. POSTAL 2

Similarity 58% 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? POSTAL 2 is a violent, dark humor and open world game developed and published by Running With Scissors. Released on November 02nd 2012 has received 114,567 reviews of which 110,950 were positive and 3,617 were negative resulting in an impressive rating of 9.5 out of 10. Currently offered at a significant 90% discount, this title has earned the #10 position in the best deals for games like Half-Life: Opposing Force.
9.5
110,950
3,617

-90% 10.00€ 1.00€

Free games like Half-Life: Opposing Force on Steam

Check out this fantastic list of free-to-play games like Half-Life: Opposing Force you can enjoy on Steam right now, updated on May 01st 2025. Looking for even more free titles? Use the search filters to explore a wider range of free to play games like Half-Life: Opposing Force.

1. Halo Infinite

Similarity 68% From one of gaming's most iconic sagas, Halo is bigger than ever. Featuring an expansive open-world campaign and a dynamic free to play multiplayer experience. Halo Infinite is a free to play, fps and multiplayer game developed by 343 Industries and published by Xbox Game Studios. Released on November 15th 2021 has received 176,400 reviews of which 123,072 were positive and 53,328 were negative resulting in a rating of 6.9 out of 10. With 2,429 active players enjoying it for free, this strategy game has reached the #1 spot among the top free games like Half-Life: Opposing Force.
6.9
123,072
53,328

2,429
players

2. Quake Champions

Similarity 59% Step into the Arena. Compete against players from around the world in this fast-paced shooter that combines the dark mythos of the original Quake with the skill-based competition of Quake III Arena. Become a Champion. Quake Champions is a arena shooter, hero shooter and early access game developed by id Software and published by Bethesda Softworks. Released on August 18th 2022 has received 38,296 reviews of which 28,247 were positive and 10,049 were negative resulting in a rating of 7.3 out of 10. Thanks to its free to play tag and a daily player base of 218, this game has secured the #2 spot in the ranking of free games like Half-Life: Opposing Force.
7.3
28,247
10,049

218
players

3. America's Army: Proving Grounds

Similarity 55% America’s Army: Proving Grounds is the official game of the U.S. Army and part of the highly acclaimed America’s Army game series. This free military game focuses on small unit tactical maneuvers and puts you to the test in a wide variety of new America’s Army maps and AA fan favorites. America's Army: Proving Grounds is a free to play, fps and action game developed and published by U.S. Army. Released on August 29th 2013 has received 10,925 reviews of which 8,617 were positive and 2,308 were negative resulting in a rating of 7.7 out of 10. Thanks to its free to play tag and a daily player base of 171, this game has secured the #3 spot in the ranking of free games like Half-Life: Opposing Force.
7.7
8,617
2,308

171
players

4. TOXIKK™

Similarity 57% FRAG LIKE IT'S 1999! TOXIKK plays as if today's military shooters never existed: Designed as a spiritual successor to the FPS giants of the late 90s and early 2ks, TOXIKK carefully evolves their mechanics with modern technology and fresh ideas elaborated with Arena-FPS enthusiasts. TOXIKK™ is a fps, action and free to play game developed by Reakktor Studios and published by Schwiezer System GmbH. Released on September 10th 2016 has received 5,795 reviews of which 4,472 were positive and 1,323 were negative resulting in a rating of 7.5 out of 10. Attracting a solid base of 144 players due to its free access, this strategy game has achieved the #4 position in the best free games like Half-Life: Opposing Force.
7.5
4,472
1,323

144
players

5. Classic Marathon

Similarity 61% From the team that brought you Aleph One, the classic sci-fi FPS Marathon from Bungie on Mac revived for modern hardware by the fan community. Classic Marathon is a fps, shooter and pvp game developed and published by Aleph One Developers. Released on May 10th 2024 has received 883 reviews of which 812 were positive and 71 were negative resulting in a rating of 8.7 out of 10. The game currently holds the #5 spot among the most played free games like Half-Life: Opposing Force.
8.7
812
71

18
players

6. The Lab

Similarity 60% Welcome to The Lab, a compilation of Valve’s room-scale VR experiments set in a pocket universe within Aperture Science. Fix a robot, defend a castle, adopt a mechanical dog, and more. Still not sold? It’s free! The Lab is a free to play, vr and singleplayer game developed and published by Valve. Released on April 05th 2016 has received 6,347 reviews of which 6,030 were positive and 317 were negative resulting in an impressive rating of 9.2 out of 10. The game currently holds the #6 spot among the most played free games like Half-Life: Opposing Force.
9.2
6,030
317

11
players

7. BRINK

Similarity 58% You decide the combat role you want to assume in the world of Brink as you fight to save yourself and mankind’s last refuge! BRINK is a fps, action and multiplayer game developed by Splash Damage and published by Bethesda Softworks. Released on May 09th 2011 has received 7,923 reviews of which 4,980 were positive and 2,943 were negative resulting in a rating of 6.2 out of 10. The game currently holds the #7 spot among the most played free games like Half-Life: Opposing Force.
6.2
4,980
2,943

9
players

8. Quake II RTX

Similarity 60% Quake II RTX is a cutting-edge, ray-traced reimagining of id software’s old school classic, by NVIDIA’s Lightspeed Studios. Global lighting effects, including realistic reflections, refraction, shadows, ambient occlusion and global illumination are a result of the path-traced simulation of light. Quake II RTX is a free to play, action and fps game developed by Lightspeed Studios™ and published by NVIDIA. Released on June 06th 2019 has received 4,568 reviews of which 3,993 were positive and 575 were negative resulting in a rating of 8.5 out of 10. The game currently holds the #8 spot among the most played free games like Half-Life: Opposing Force.
8.5
3,993
575

6
players

9. Transmissions: Element 120

Similarity 60% TE120 is a short single player experience set in the Half-Life Universe featuring a gravity defying weapon that allows you to jump buildings and sustain large falls. The story takes place at a mysterious date & location. Where are you? Why have you been sent? Transmissions: Element 120 is a free to play, action and shooter game developed by Shokunin, Thomas M. Visser and Vincent Thiele and published by Self published. Released on June 16th 2016 has received 9,786 reviews of which 9,248 were positive and 538 were negative resulting in an impressive rating of 9.2 out of 10. The game currently holds the #9 spot among the most played free games like Half-Life: Opposing Force.
9.2
9,248
538

4
players

10. Nirvana

Similarity 56% Wake up and embrace your new powers. In this Bullet Hell Fast-FPS, dare to take on mystical creatures to defeat the God Raj. Nirvana awaits... Nirvana is a action, adventure and platformer game developed by Mastoc Studio and published by ESMA - Ecoles Creatives. Released on February 01st 2025 has received 370 reviews of which 345 were positive and 25 were negative resulting in a rating of 8.6 out of 10. The game currently holds the #10 spot among the most played free games like Half-Life: Opposing Force.
8.6
345
25

2
players