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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Condemned: Criminal Origins

What twists the mind of an ordinary human into a serial killer?

Similarity 60%
Price -90% 1.02€
Rating 8.4
Release 29 Oct 2012

Tom Clancy’s Rainbow Six® Extraction

Tom Clancy's Rainbow Six® Extraction is a tactical, co-op, PvE first-person shooter where you and your squad face an evolving alien threat. Teamwork, tactics, and flawless execution are key to your survival.

Similarity 59%
Price 39.99€
Rating 6.4
Release 15 Jun 2023

Red Dead Redemption 2

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.

Similarity 59%
Price 59.99€
Rating 9.1
Release 05 Dec 2019

Quake Champions

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.

Similarity 59%
Price Free to play
Rating 7.3
Release 18 Aug 2022

Metro Exodus

Flee the shattered ruins of the Moscow Metro and embark on an epic, continent-spanning journey across the post-apocalyptic Russian wilderness. Explore vast, non-linear levels, lose yourself in an immersive, sandbox survival experience, and follow a thrilling story-line that spans an entire year in the greatest Metro adventure yet.

Similarity 59%
Price 29.99€
Rating 8.9
Release 14 Feb 2020

Outcast 1.1

Outcast 1.1 is an enhanced version of the critically acclaimed action-adventure game developed in 1999 by Appeal for the PC.

Similarity 59%
Price 5.29€
Rating 8.3
Release 18 Dec 2014

Painkiller Hell & Damnation

Evil has returned! Demonic powers are manifesting themselves as a myriad of dark creatures, fighting over the fates of imprisoned souls caught in Purgatory.

Similarity 59%
Price 19.99€
Rating 7.6
Release 31 Oct 2012

Call of Duty®: Black Ops

The biggest first-person action series of all time and the follow-up to critically acclaimed Call of Duty®: Modern Warfare 2 returns with Call of Duty®: Black Ops.

Similarity 59%
Price 39.99€
Rating 8.9
Release 08 Nov 2010

Tom Clancy's Rainbow Six® Vegas 2

Tom Clancy's Rainbow Six® Vegas 2 - the sequel to the award-winning next-generation first-person shooter - returns to Sin City. Tom Clancy's Rainbow Six Vegas 2 is your last chance to rescue America's sexiest city from an escalating terrorist siege that will force you into heart-pounding action from beginning to end.

Similarity 59%
Price 9.99€
Rating 8.2
Release 16 Apr 2008

Serious Sam: Siberian Mayhem

Serious Sam: Siberian Mayhem is a new stand-alone expansion to the world of the classic FPS series. Join the fight against Notorious Mental on a journey through the wild lands of Russia, and find your way through this lost chapter of Sam Stone's adventures.

Similarity 59%
Price -67% 6.52€
Rating 8.9
Release 25 Jan 2022

Borderlands: The Pre-Sequel

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!

Similarity 59%
Price -93% 2.92€
Rating 8.0
Release 16 Oct 2014

Painkiller: Black Edition

Painkiller Black Edition includes the expansion pack Battle Out of Hell, featuring 10 additional single-player levels and many new villains.

Similarity 59%
Price -65% 3.48€
Rating 8.5
Release 24 Jan 2007

Delta Force 1

As a member of Delta Force — The Army's Elite, top secret special forces unit — the word 'impossible' is not in your vocabulary. In Delta Force, you will conduct missions swiftly and silently, in every possible terrain, under every imaginable condition and through unconventional means.

Similarity 59%
Price 4.99€
Rating 8.5
Release 18 Jun 2009

BRINK

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!

Similarity 59%
Price Free to play
Rating 6.2
Release 09 May 2011

Natural Selection 2

A fast paced multiplayer shooter that pits aliens against humans in a strategic and action-packed struggle for survival!

Similarity 59%
Price 4.99€
Rating 8.3
Release 30 Oct 2012

Crysis 3 Remastered

Experience the single-player experience from the iconic first-person shooter, Crysis 3, optimized to take advantage of today's hardware in Crysis 3 Remastered.

Similarity 58%
Price -65% 10.62€
Rating 8.5
Release 17 Nov 2022

Crysis 2 Remastered

Relive the legendary single-player campaign from the classic first-person shooter, Crysis 2, optimized for today's hardware in Crysis 2 Remastered.

Similarity 58%
Price -76% 7.07€
Rating 8.6
Release 17 Nov 2022

EBOLA 3

EBOLA 3 - is created in the spirit of the great classics of survival horrors. In this game, you will control the main character with a first-person camera which makes you feel like you’re in a real horror movie.

Similarity 58%
Price 19.50€
Rating 6.9
Release 19 Sep 2022

ARMORED HEAD

ARMORED HEAD is a miniature shooter, where all the action takes place in one arena. The main character is a gladiator who fights against his opponents in pursuit of the grand prize.

Similarity 58%
Price 4.99€
Rating 9.2
Release 31 Jul 2020

Another World – 20th Anniversary Edition

Also known as Out Of This World™, Another World is a pioneer action/platformer that released across more than a dozen platforms since its debut in 1991. Along the years, Another World™ has attained cult status among critics and sophisticated gamers alike.

Similarity 58%
Price 9.99€
Rating 8.0
Release 04 Apr 2013

Sudeki

Sudeki, a world torn apart into light, shadow and dark. Rent asunder by deceit and betrayal, the land cries out for a peace that only four united heroes can bring. Beyond the protective walls of Illumina Castle lie miles of pastoral, rolling countryside, though once a serene landscape, the Aklorian forces have transformed the countryside...

Similarity 58%
Price 5.99€
Rating 8.4
Release 24 Feb 2014

Thief™ II: The Metal Age

The ultimate thief is back! Tread softly as you make your way through 15 new complex, non-linear levels full of loot to steal and guards to outsmart. Improved enemy AI, new gadgets and a riveting story will draw you into the world of Thief™ II: The Metal Age, a place of powerful new technologies, fanatical religions and corruption.

Similarity 58%
Price 6.99€
Rating 9.0
Release 22 May 2012

Tom Clancy's Rainbow Six® Vegas

Tom Clancy's Rainbow Six makes its next-generation hardware debut in the most dramatic installment of the renowned first-person shooter franchise to date. Rainbow operatives take to the chaotic streets of Las Vegas as an escalating terrorist siege in 'Sin City' threatens to take world terrorism to new, uncontrollable heights.

Similarity 58%
Price 9.99€
Rating 7.6
Release 09 Apr 2008

XIII - Classic

You are the victim of a conspiracy! The FBI, CIA and a group of murderers are chasing you. XIII… This strange tattoo and the key of a safe are your only clues to survive and claim your innocence! It's time to gear up and eliminate your ennemies!

Similarity 58%
Price 12.99€
Rating 8.6
Release 11 Jun 2020

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 April 27th 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 713,581 reviews of which 657,608 were positive and 55,973 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 29,802 peak concurrent players over the last day.
9.1
657,608
55,973

29,802
players

2. Cyberpunk 2077

Similarity 58% 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 23,112 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

23,112
players

3. Fallout 4

Similarity 65% 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 15,560 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

15,560
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 240,140 reviews of which 221,902 were positive and 18,238 were negative resulting in an impressive rating of 9.1 out of 10. With 6,626 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
221,902
18,238

6,626
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 225,642 reviews of which 216,820 were positive and 8,822 were negative resulting in an impressive rating of 9.5 out of 10. With 5,447 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
216,820
8,822

5,447
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 5,194 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

5,194
players

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

Similarity 57% 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 110,893 reviews of which 89,668 were positive and 21,225 were negative resulting in a rating of 8.0 out of 10. With 3,967 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
89,668
21,225

3,967
players

8. Metro 2033 Redux

Similarity 65% 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 3,395 concurrent players in the last 24 hours, the game currently holds the #8 spot among the most played games like Half-Life: Opposing Force.
9.0
94,593
9,148

3,395
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 55,225 reviews of which 50,283 were positive and 4,942 were negative resulting in a rating of 9.0 out of 10. With 3,149 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
50,283
4,942

3,149
players

10. Halo Infinite

Similarity 69% 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 3,069 concurrent players in the last 24 hours, the game currently holds the #10 spot among the most played games like Half-Life: Opposing Force.
6.9
123,072
53,328

3,069
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 April 27th 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 56% 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 2,725 reviews of which 2,606 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
2,606
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 7,455 reviews of which 6,930 were positive and 525 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
6,930
525

-95% 25.00€ 1.25€

3. Borderlands: The Pre-Sequel

Similarity 59% 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 41,197 reviews of which 33,563 were positive and 7,634 were negative resulting in a rating of 8.0 out of 10. Thanks to its incredible 93% discount, this game is now the #3 best deal in games like Half-Life: Opposing Force.
8.0
33,563
7,634

-93% 41.71€ 2.92€

4. F.E.A.R. 3

Similarity 65% 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 12,640 reviews of which 9,005 were positive and 3,635 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
9,005
3,635

-93% 19.71€ 1.38€

5. INDUSTRIA

Similarity 64% 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 55% 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 65% 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. Deus Ex: Mankind Divided

Similarity 65% 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 40,682 reviews of which 30,884 were positive and 9,798 were negative resulting in a rating of 7.5 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.
7.5
30,884
9,798

-91% 30.56€ 2.75€

9. 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 114,374 reviews of which 110,759 were positive and 3,615 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 #9 position in the best deals for games like Half-Life: Opposing Force.
9.5
110,759
3,615

-90% 10.00€ 1.00€

10. Deus Ex: Human Revolution - Director's Cut

Similarity 65% You play Adam Jensen, an ex-SWAT specialist who's been handpicked to oversee the defensive needs of one of America's most experimental biotechnology firms. Your job is to safeguard company secrets, but when a black ops team breaks in and kills the very scientists you were hired to protect, everything you thought you knew about your job... Deus Ex: Human Revolution - Director's Cut is a cyberpunk, stealth and rpg game developed by Eidos Montreal and published by Eidos Interactive Corp.. Released on October 25th 2013 has received 27,987 reviews of which 25,788 were positive and 2,199 were negative resulting in an impressive rating of 9.0 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.
9.0
25,788
2,199

-90% 20.00€ 2.00€

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 April 27th 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 69% 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 3,069 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

3,069
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 301, this game has secured the #2 spot in the ranking of free games like Half-Life: Opposing Force.
7.3
28,247
10,049

301
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 8,618 were positive and 2,307 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 212, this game has secured the #3 spot in the ranking of free games like Half-Life: Opposing Force.
7.7
8,618
2,307

212
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

43
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 6,339 reviews of which 6,024 were positive and 315 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
6,024
315

21
players

7. 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 #7 spot among the most played free games like Half-Life: Opposing Force.
8.5
3,993
575

13
players

8. BRINK

Similarity 59% 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 7,920 reviews of which 4,976 were positive and 2,944 were negative resulting in a rating of 6.2 out of 10. The game currently holds the #8 spot among the most played free games like Half-Life: Opposing Force.
6.2
4,976
2,944

11
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 9,779 reviews of which 9,241 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
9,241
538

4
players

10. Shadow Warrior Classic (1997)

Similarity 58% Strap on your combat sandals...Lo Wang is coming to the Land of the Rising Sun to turn out the lights. Experience total blood immersion. If you can't touch, kill or drive something...then blow it away! Whether you're wielding shurikens, an Uzi, or a freshly plundered Guardian head...you've got your work cut out for you. Shadow Warrior Classic (1997) is a fps, classic and free to play game developed by 3D Realms and published by Devolver Digital. It has received 1,471 reviews of which 1,366 were positive and 105 were negative resulting in a rating of 8.8 out of 10. The game currently holds the #10 spot among the most played free games like Half-Life: Opposing Force.
8.8
1,366
105

3
players