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.

Filters & Lists

Dead Space™ 2

Three years after the Necromorph infestation aboard the USS Ishimura, Isaac Clarke awakens from a coma, confused, disoriented, and on a space station called The Sprawl. Explore this world and its zero-g environments to discover the truth about the Unitology and its role in the Necromorph epidemic.

Similarity 55%
Price 19.99€
Rating 9.2
Release 27 Jan 2011

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

Zeno Clash

Zeno Clash is an action/fighting game set in a punk fantasy world. The game is played from a first person perspective and the combat is generally up close and brutal. Experience a deep storyline set in a fantastic world.

Similarity 55%
Price 9.99€
Rating 8.3
Release 21 Apr 2009

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 -75% 2.49€
Rating 8.8
Release 15 Jul 2008

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

Zortch

Meet Zortch Maxinum: short order cook, amateur engineer and professional slacker; Bored and tired of her day job she decides to go on a holiday but alas she picks a cheap option: turns out it's a scheme by aliens who capture humans to eat their brains! also this game is a sci-fi horror comedy fps

Similarity 54%
Price 4.60€
Rating 9.2
Release 08 Jun 2023

INCISION

All old-school FPS action. No Bullshit. Lots of blood & gore. Slaughter your way through nightmarish industrial mazes, transformed cityscapes and surreal alien structures to cut down the Growth in this ultraviolent, fast-paced, and merciless retro-styled first person shooter.

Similarity 54%
Price 13.99€
Rating 8.5
Release 16 Sep 2022

Dread X Collection 2

Explore 12 horror games made in 10 days connected by a meta narrative experience you didn't expect. Step into a world of darkness and discover the secrets you didn't know were right beneath the surface. Find the tapes and unlock the mystery inside the Dread X Collection 2.

Similarity 54%
Price 8.19€
Rating 8.9
Release 21 Aug 2020

Turbo Overkill

Enter Paradise as Johnny Turbo—half-metal, half-human, all-murder machine. Clean up the streets with a chainsaw leg, 15+ weapons and your hovercar as you battle the rogue AI Syn, rival bounty hunters and cyberpunks aplenty. Apogee’s most outrageous FPS since Duke Nukem 3D. Good hunting, Sir!

Similarity 54%
Price -83% 3.37€
Rating 9.2
Release 11 Aug 2023

Bears In Space

Unleash your inner bear in this over-the-top bullet-hell FPS! Embark on a zany retro-futuristic adventure and destroy oil-thirsty robots with an outrageous arsenal. Transform into a bear, wield unique powers, and embrace the absurd fast-paced action of Bears in Space!

Similarity 54%
Price -33% 13.42€
Rating 8.7
Release 22 Mar 2024

Hubris

Hubris is a VR action-adventure game set in a unique and colourful Sci-Fi universe, with immersive movement options, including swimming, climbing, and jumping. Players will have to gather resources, craft food and upgrade their weapons to fight off alien wildlife, droids, and humanoid enemies.

Similarity 54%
Price 29.99€
Rating 7.2
Release 07 Dec 2022

SENTRY

SENTRY is an action-defense first person shooter where you defend your spaceship against invading aliens. Plot an escape route through hostile space and battle the enemy across your vessel with the support of traps, turrets and environmental destruction.

Similarity 54%
Price 19.99€
Rating 8.0
Release 25 Mar 2024

Rise of Liberty

Rise of Liberty is a FPS single-player massive Revolutionary War battle simulator. Fire deafening cannons into the thick of the battle, stand in line formation and fire devastating volleys into the enemy. Gather your men for these monumental battles and defeat the enemy!

Similarity 54%
Price 6.59€
Rating 8.1
Release 30 May 2019

Serious Sam Fusion 2017 (beta)

Serious Sam Fusion is a central hub for several existing Serious Sam games developed by Croteam. Cool new features, engine upgrades, patches and updates will be released to existing owners for FREE!

Similarity 54%
Price 14.99€
Rating 9.0
Release -

STAR WARS™ SHADOWS OF THE EMPIRE™

As Luke Skywalker and the Rebel Alliance struggle to defeat Darth Vader and the Empire, a new threat arises. Dark Prince Xizor aspires to take Darth Vader's place at the Emperor's side. As Dash Rendar, it's up to you to protect Luke and help the Alliance. May the Force be with you!

Similarity 54%
Price 5.89€
Rating 7.1
Release 07 Feb 2017

Rodina

A single-developer passion project. A seamless full scale solar system. Thrilling action. Be part of an incredible journey as a Universe is built from the ground up!

Similarity 54%
Price 14.99€
Rating 8.8
Release 28 Jul 2014

Far Cry® 4

Hidden in the towering Himalayas lies Kyrat, a country steeped in tradition and violence. You are Ajay Ghale. Traveling to Kyrat to fulfill your mother’s dying wish, you find yourself caught up in a civil war to overthrow the oppressive regime of dictator Pagan Min.

Similarity 54%
Price -83% 5.09€
Rating 8.3
Release 17 Nov 2014

A.I.M.2 Clan Wars

A.I.M. 2 is the sequel to the epic science fiction first-person action RPG developed by SkyRiver Studios. Its compelling story and unique look lift off exactly where the original ended. New clans led by Mechminds of the Fifth Generation are powerful and well-organized formations with far-reaching plans.

Similarity 54%
Price 2.99€
Rating 7.4
Release 22 May 2014

Tom Clancy’s Splinter Cell Blacklist

The United States has a military presence in two-thirds of countries around the world, and some of them have had enough. A group of terrorists calling themselves The Engineers initiate a terror ultimatum called the Blacklist - a deadly countdown of escalating attacks on U.S. interests.

Similarity 54%
Price 19.99€
Rating 7.9
Release 22 Aug 2013

Far Cry 3

Discover the dark secrets of a lawless island ruled by violence and take the fight to the enemy as you try to escape. You’ll need more than luck to escape alive!

Similarity 54%
Price 19.99€
Rating 8.8
Release 28 Nov 2012

Alien Rage - Unlimited

Unleash a fury of powerful weapons as you blast your way through armies of Alien forces hell-bent on taking you down! Battle through 14 intense levels and prepare to face a barrage of beastly-sized bosses that will test your every skill. Each of your 10 weapons comes with two firing modes and you’ll need all of them!

Similarity 54%
Price 19.99€
Rating 6.6
Release 24 Sep 2013

Oddworld: Abe's Exoddus®

Abe's peaceful retirement was shattered when visited by a vision from the Mudokon Spirit Guides. Abe™ learned the Magog Cartel was mining Necrum, the sacred Mudokon city of the dead, to collect bones to make super-addictive SoulStorm Brew.

Similarity 54%
Price 2.99€
Rating 9.0
Release 28 Aug 2008

Day of Defeat

Enlist in an intense brand of Axis vs. Allied teamplay set in the WWII European Theatre of Operations. Players assume the role of light/assault/heavy infantry, sniper or machine-gunner class, each with a unique arsenal of historical weaponry at their disposal. Missions are based on key historical operations.

Similarity 54%
Price 4.99€
Rating 8.8
Release 01 May 2003

Tom Clancy's Ghost Recon® Breakpoint

Become a Ghost, fighting against a rogue spec ops faction called the Wolves, in the latest Tom Clancy's Ghost Recon®!

Similarity 54%
Price 59.99€
Rating 7.2
Release 23 Jan 2023

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 833,276 reviews of which 701,353 were positive and 131,923 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
701,353
131,923

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 213,168 reviews of which 179,563 were positive and 33,605 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
179,563
33,605

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 96,266 reviews of which 87,371 were positive and 8,895 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
87,371
8,895

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 95% discount, this game currently holds the #1 spot in the best deals for games like Half-Life: Opposing Force.
9.1
2,606
119

-95% 31.20€ 1.56€

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. 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. Thanks to its incredible 95% discount, this game is now the #3 best deal in games like Half-Life: Opposing Force.
6.9
2,273
927

-95% 20.00€ 1.00€

4. 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. 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.
8.0
33,563
7,634

-93% 41.86€ 2.93€

5. 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 #5 position in the best deals for games like Half-Life: Opposing Force.
7
9,005
3,635

-93% 19.71€ 1.38€

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 38,562 reviews of which 36,313 were positive and 2,249 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
36,313
2,249

-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 96,266 reviews of which 87,371 were positive and 8,895 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
87,371
8,895

-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. 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. Shadow Warrior

Similarity 64% Shadow Warrior is a bold reimagining of the classic 3D Realms’ shooter from independent developer Flying Wild Hog (Hard Reset) starring the legendary and quick-witted warrior Lo Wang. Shadow Warrior is a action, fps and swordplay game developed by Flying Wild Hog and published by Devolver Digital. Released on September 26th 2013 has received 26,069 reviews of which 24,000 were positive and 2,069 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
24,000
2,069

-90% 28.99€ 2.89€

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 38,273 reviews of which 28,231 were positive and 10,042 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
28,231
10,042

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 5,794 reviews of which 4,471 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
4,471
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 4,559 reviews of which 3,985 were positive and 574 were negative resulting in a rating of 8.4 out of 10. The game currently holds the #7 spot among the most played free games like Half-Life: Opposing Force.
8.4
3,985
574

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