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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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 55%
Price 4.99€
Rating 8.8
Release 01 May 2003

ZERO PROTOCOL

In this immersive sci-fi thriller, you will experience the atmosphere of classic 3D games as you solve puzzles, follow an intriguing non-linear storyline, and engage in battles with monsters.

Similarity 54%
Price 11.79€
Rating 8.0
Release 26 Sep 2024

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

Forgive Me Father 2

Embark on a journey into the darkest nightmares to restore your sanity. Blast your way through hordes of possessed enemies, unlock an arsenal of deadly weapons and unearthly abilities, and get ready to face even more Lovecraftian madness in this action-packed FPS sequel.

Similarity 54%
Price -81% 4.70€
Rating 8.2
Release 24 Oct 2024

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

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

Marvel's Guardians of the Galaxy

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.

Similarity 54%
Price -92% 4.99€
Rating 9.2
Release 26 Oct 2021

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 -75% 1.47€
Rating 7.1
Release 07 Feb 2017

Tomb Raider II (1997)

The second instalment in the Tomb Raider series invites you to join Lara as she travels around the globe to retrieve a precious artefact before it falls into the wrong hands. The legendary artefact, the Dagger of Xian, is said to give its possessor the power of a fire breathing dragon.

Similarity 54%
Price 6.99€
Rating 8.3
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

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 54%
Price 19.99€
Rating 9.2
Release 27 Jan 2011

Call of Duty®: Modern Warfare® 3 (2011)

The best-selling first-person action series of all-time returns with an epic sequel to the multiple GOTY award winner Call of Duty®: Modern Warfare® 2

Similarity 54%
Price 39.99€
Rating 8.4
Release 07 Nov 2011

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 54%
Price 9.99€
Rating 8.3
Release 21 Apr 2009

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

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

STAR WARS™: Squadrons

Master the art of starfighter combat in the authentic piloting experience STAR WARS™: Squadrons. Feel the adrenaline of first-person multiplayer space dogfights alongside your squadron, and buckle up in a thrilling STAR WARS™ story.

Similarity 54%
Price 39.99€
Rating 6.5
Release 01 Oct 2020

Hidden & Dangerous 2: Courage Under Fire

Hidden & Dangerous 2 is a first and third person tactical shooter that builds upon the tremendous success of Hidden & Dangerous. You lead a small squad of Allied soldiers deep behind enemy lines, to carry out secret missions during World War II.

Similarity 54%
Price -90% 1.00€
Rating 8.9
Release 20 Dec 2017

Operation Warcade VR

Relive the experience of playing the classic war arcade in a totally amazing way, thanks to virtual reality and the innovative immersion system that will make it possible for you to travel inside the video game.

Similarity 54%
Price 19.99€
Rating 8.6
Release 04 Aug 2017

Dead Effect 2

Dead Effect 2 is the newest addition to the acclaimed Dead Effect franchise. This action sci-fi shooter is looking to push the boundaries of first-person shooters to new levels with slick graphics, rich narrative and RPG elements.

Similarity 54%
Price 11.99€
Rating 7.1
Release 06 May 2016

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

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