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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Half-Life: Source Winner of over 50 Game of the Year awards, Half-Life set new standards for action games when it was released in 1998. Half-Life: Source is a digitally remastered version of the critically acclaimed and best selling PC game, enhanced via Source technology to include physics simulation, enhanced effects, and more.

Similarity 95%
Price 9.75€
Rating 6.8
Release 01 Jun 2004
Half-Life: Blue Shift Made by Gearbox Software and originally released in 2001 as an add-on to Half-Life, Blue Shift is a return to the Black Mesa Research Facility in which you play as Barney Calhoun, the security guard sidekick who helped Gordon out of so many sticky situations.

Similarity 92%
Price 4.99€
Rating 9.0
Release 01 Jun 2001
STAR WARS™ Dark Forces (Classic, 1995) Behind a veil of secrecy the evil Empire is creating a doomsday army - one that, if finished, will become the final cog in the Empire's arsenal of terror and domination. Your Mission? Join the Rebel Alliance's covert operations division, infiltrate the Empire.

Similarity 90%
Price 5.89€
Rating 8.6
Release 16 Sep 2009
Half-Life 2 Reawakened from stasis in the occupied metropolis of City 17, Gordon Freeman is joined by Alyx Vance as he leads a desperate human resistance. Experience the landmark first-person shooter packed with immersive world-building, boundary-pushing physics, and exhilarating combat.

Similarity 90%
Price 9.75€
Rating 9.7
Release 16 Nov 2004
Chaser Mars, 2044. The UN establishes MARSCORP (Martian Security and Economics Committee) under the leadership of Samuel Longwood. In the years that follow, the UN gradually loses control of MARSCORP, mainly due to the non-transparent licence policy of its director.

Similarity 87%
Price -87% 0.67€
Rating 6.8
Release 16 Jul 2010
Half-Life Named Game of the Year by over 50 publications, Valve's debut title blends action and adventure with award-winning technology to create a frighteningly realistic world where players must think to survive. Also includes an exciting multiplayer mode that allows you to play against friends and enemies around the world.

Similarity 85%
Price 8.19€
Rating 9.5
Release 19 Nov 1998
STAR WARS™ Jedi Knight - Mysteries of the Sith™ It is five years after Kyle's victory over the seven dark Jedi. Invading Imperial forces advance upon a quiet Rebel outpost, interrupting Kyle's training of a brave new Jedi, Mara Jade. First introduced in Timothy Zahn's award-winning Star Wars novel, Heir to the Empire, Mara Jade blends her past experiences as a one time smuggler and...

Similarity 85%
Price 2.99€
Rating 6.4
Release 16 Sep 2009
STAR WARS™ Jedi Knight: Dark Forces II Jedi Knight: Dark Forces II picks up where the award-winning Dark Forces™ game left off...with even more features and firepower in dazzling 3D graphics. As Kyle Katarn, you must acquire a lightsaber and learn the ways of the Force to become a Jedi Knight.

Similarity 85%
Price 5.89€
Rating 7.7
Release 16 Sep 2009
TRON 2.0 Over 35 levels of challenging gameplay -- Race at the speed of light, fight off computer Viruses and engage in violent digital combat.

Similarity 84%
Price 9.75€
Rating 8.5
Release 10 Oct 2014
STAR WARS™ Jedi Knight II - Jedi Outcast™ The Legacy of Star Wars Dark Forces™ and Star Wars® Jedi Knight lives on in the intense first-person action of Jedi Outcast.

Similarity 84%
Price 9.75€
Rating 8.8
Release 16 Sep 2009
Aliens versus Predator Classic 2000 Aliens Versus Predator Classic 2000 features the Colonial Marine, Alien and Predator Campaigns and the frenetic single-player Skirmish mode from the original title: Alien Versus Predator Gold Edition, which was released to massive acclaim in 2000.

Similarity 83%
Price -72% 1.41€
Rating 8.4
Release 15 Jan 2010
Crysis Warhead® Pulse-racing new installment from 2007's PC Game of the Year*: Play as Sergeant Sykes and experience a whole new side of the battle. A standard combat mission behind enemy lines becomes critical when you discover your enemies have captured something of vital importance to the ensuing war.

Similarity 83%
Price 19.99€
Rating 8.3
Release 17 Sep 2008
Quake II You are humanity’s last hope to stop the Strogg, a hostile alien race waging war against Earth. Play this military sci-fi FPS, now upgraded for modern platforms with improved visuals, new campaign content, online multiplayer/co-op, and more.

Similarity 83%
Price -92% 0.88€
Rating 9.3
Release 03 Aug 2007
Black Mesa Relive Half-Life.

Similarity 81%
Price -22% 15.23€
Rating 9.4
Release 06 Mar 2020
Judge Dredd: Dredd vs. Death Welcome to Mega-City One, a city of over 400 million people - every one of them a potential criminal. It is the third decade of the 22nd Century, unemployment is widespread, boredom is universal and only the Judges can prevent total anarchy. Empowered to dispense instant justice, they are Judge, Jury and Executioner all in one.

Similarity 81%
Price -72% 2.31€
Rating 8.3
Release 26 Mar 2009
SiN Episodes: Emergence You are John Blade, commander of HardCorps, an elite security force dedicated to protecting the people of Freeport City. Four years have passed since your first battle with Elexis Sinclaire, a beautiful, brilliant, and ruthless scientist who is out to remake humanity according to her own twisted vision.

Similarity 80%
Price 8.19€
Rating 8.5
Release 10 May 2006
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 79%
Price 4.99€
Rating 8.5
Release 18 Jun 2009
Delta Force 2 You're a member of the U.S. Army's best kept secret: the elite SPECIAL OPERATIONS unit known as Delta Force, formed to BATTLE TERRORISM throughout the world. When the best of the rest can't handle the op, YOU are called into action. Can you handle THE JOB? Features FREE NovaWorld™: online gaming supporting up to 50 players.

Similarity 79%
Price -8% 4.64€
Rating 8.1
Release 18 Jun 2009
STAR WARS™ Republic Commando™ You are the leader of an elite squad of Republic Commandos, your mission is to infiltrate, dominate, and ultimately, annihilate the enemy. Your squad will follow your orders and your lead, working together as a team - instinctively, intelligently, instantly. You are their leader. They are your weapon.

Similarity 79%
Price 9.75€
Rating 9.3
Release 08 Jul 2009
Red Faction JOIN THE REVOLUTION! Lured to Mars by the Ultor Corporation's promise of a better life, thousands have come to seek their fortune and work for the massive mining company. But all is not as it seems. A deadly plague is sweeping through the barracks, and miners suffer daily abuse at the hands of the Ultor guards.

Similarity 79%
Price -95% 0.51€
Rating 8.3
Release 05 Aug 2009
Crysis 2 - Maximum Edition Aliens are decimating New York City, only you have the technology to survive. Be The Weapon.

Similarity 78%
Price 29.99€
Rating 8.3
Release 22 Mar 2011
Quake 4 As part of the elite Rhino Squad, you must spearhead Earth’s military invasion of a hostile alien homeworld. But, in this desperate war for humanity’s survival against an unrelenting enemy, you may discover that the only way to defeat them...is to become one of them.

Similarity 78%
Price -74% 3.99€
Rating 8.4
Release 04 Aug 2011
Far Cry® A tropical paradise seethes with hidden evil in Far Cry®, a cunningly detailed action shooter that pushes the boundaries of combat to shocking new levels. Freelance mariner Jack Carver is cursing the day he ever came to this island.

Similarity 77%
Price 9.99€
Rating 8.0
Release 01 Apr 2008
Quake Developed by the award-winning id Software, Quake® is the ground-breaking, original dark fantasy first-person shooter that inspires today’s retro-style FPS games. With Quake (Enhanced), experience the authentic, updated, and visually enhanced version of the original.

Similarity 77%
Price -91% 0.91€
Rating 9.4
Release 03 Aug 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 June 16th 2025.

1. STAR WARS™ Battlefront™ II

Similarity 55% Be the hero in the ultimate STAR WARS™ battle fantasy with STAR WARS™ Battlefront™ II: Celebration Edition! STAR WARS™ Battlefront™ II is a multiplayer, shooter and singleplayer game developed by DICE and published by Electronic Arts. Released on June 11th 2020 has received 71,208 reviews of which 62,342 were positive and 8,866 were negative resulting in a rating of 8.6 out of 10. The game has hit the top spot as the #1 most played game like Half-Life: Opposing Force, thanks to its 9,213 peak concurrent players over the last day.
8.6
62,342
8,866

9,213
players

2. Counter-Strike

Similarity 64% Play the world's number 1 online action game. Engage in an incredibly realistic brand of terrorist warfare in this wildly popular team-based game. Ally with teammates to complete strategic missions. Take out enemy sites. Rescue hostages. Your role affects your team's success. Your team's success affects your role. Counter-Strike is a action, fps and multiplayer game developed and published by Valve. Released on November 01st 2000 has received 250,245 reviews of which 243,818 were positive and 6,427 were negative resulting in an impressive rating of 9.6 out of 10. While seeing 7,323 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.
9.6
243,818
6,427

7,323
players

3. Battlefield™ 1

Similarity 51% Battlefield™ 1 takes you back to The Great War, WW1, where new technology and worldwide conflict changed the face of warfare forever. Battlefield™ 1 is a fps, multiplayer and singleplayer game developed by DICE and published by Electronic Arts. Released on June 11th 2020 has received 192,821 reviews of which 166,775 were positive and 26,046 were negative resulting in a rating of 8.6 out of 10. While seeing 6,308 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.
8.6
166,775
26,046

6,308
players

4. Counter-Strike: Source

Similarity 52% Counter-Strike: Source blends Counter-Strike's award-winning teamplay action with the advanced technology of Source™ technology. Counter-Strike: Source is a shooter, fps and action game developed and published by Valve. Released on November 01st 2004 has received 182,234 reviews of which 175,426 were positive and 6,808 were negative resulting in an impressive rating of 9.5 out of 10. With 6,187 concurrent players in the last 24 hours, the game currently holds the #4 spot among the most played games like Half-Life: Opposing Force.
9.5
175,426
6,808

6,187
players

5. Call of Duty®: Black Ops III

Similarity 50% 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 215,026 reviews of which 181,306 were positive and 33,720 were negative resulting in a rating of 8.4 out of 10. With 5,414 concurrent players in the last 24 hours, the game currently holds the #5 spot among the most played games like Half-Life: Opposing Force.
8.4
181,306
33,720

5,414
players

6. DOOM: The Dark Ages

Similarity 61% DOOM: The Dark Ages is the prequel to the critically acclaimed DOOM (2016) and DOOM Eternal that tells an epic cinematic story worthy of the DOOM Slayer’s legend. Players will step into the blood-stained boots of the DOOM Slayer, in this never-before-seen dark and sinister medieval war against Hell. DOOM: The Dark Ages is a action, fps and demons game developed by id Software and published by Bethesda Softworks. Released on May 14th 2025 has received 21,671 reviews of which 18,891 were positive and 2,780 were negative resulting in a rating of 8.5 out of 10. With 3,518 concurrent players in the last 24 hours, the game currently holds the #6 spot among the most played games like Half-Life: Opposing Force.
8.5
18,891
2,780

3,518
players

7. Halo: The Master Chief Collection

Similarity 62% 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 242,067 reviews of which 223,635 were positive and 18,432 were negative resulting in an impressive rating of 9.1 out of 10. With 3,362 concurrent players in the last 24 hours, the game currently holds the #7 spot among the most played games like Half-Life: Opposing Force.
9.1
223,635
18,432

3,362
players

8. Halo Infinite

Similarity 58% 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 177,041 reviews of which 123,333 were positive and 53,708 were negative resulting in a rating of 6.9 out of 10. With 2,275 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
123,333
53,708

2,275
players

9. KovaaK's

Similarity 56% Master your aim with KovaaK’s, the world’s best aim trainer. With over 200,000 scenarios, playlists and more! Embrace total customization, including a map editor and game physics. More than just a trainer, it’s a dynamic, community-driven platform that elevates your gameplay. KovaaK's is a action, shooter and simulation game developed and published by KovaaK Games. Released on April 03rd 2018 has received 35,305 reviews of which 32,776 were positive and 2,529 were negative resulting in an impressive rating of 9.1 out of 10. With 1,719 concurrent players in the last 24 hours, the game currently holds the #9 spot among the most played games like Half-Life: Opposing Force.
9.1
32,776
2,529

1,719
players

10. DOOM

Similarity 60% Now includes all three premium DLC packs (Unto the Evil, Hell Followed, and Bloodfall), maps, modes, and weapons, as well as all feature updates including Arcade Mode, Photo Mode, and the latest Update 6.66, which brings further multiplayer improvements as well as revamps multiplayer progression. DOOM is a fps, gore and action game developed by id Software and published by Bethesda Softworks. Released on May 12th 2016 has received 207,279 reviews of which 198,001 were positive and 9,278 were negative resulting in an impressive rating of 9.4 out of 10. With 1,590 concurrent players in the last 24 hours, the game currently holds the #10 spot among the most played games like Half-Life: Opposing Force.
9.4
198,001
9,278

1,590
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 June 16th 2025. Looking for even more deals? Use the search filters to explore a wider range of discounted games like Half-Life: Opposing Force.

1. Overload

Similarity 65% A new six-degree-of-freedom shooter with intuitive controls, amazing lighting and graphics. From the creators of Descent, Overload is the best zero-gravity robot-blasting combat ever. Overload is a action, 6dof and fps game developed and published by Revival Productions and LLC. Released on May 31st 2018 has received 2,022 reviews of which 1,903 were positive and 119 were negative resulting in a rating of 9.0 out of 10. Featuring a massive 98% discount, this game currently holds the #1 spot in the best deals for games like Half-Life: Opposing Force.
9.0
1,903
119

-98% 24.99€ 0.59€

2. Battlezone 98 Redux

Similarity 55% One of the greatest sci-fi strategy games of all time returns with remastered visuals, online multiplayer and near unlimited mod content from Steam Workshop. Experience thrilling first person action and acclaimed RTS in this explosive alternate vision of the 1960s space race. Battlezone 98 Redux is a strategy, action and first-person game developed by Big Boat Interactive and published by Rebellion. Released on April 18th 2016 has received 1,064 reviews of which 975 were positive and 89 were negative resulting in a rating of 8.7 out of 10. Thanks to its incredible 98% discount, this game is now the #2 best deal in games like Half-Life: Opposing Force.
8.7
975
89

-98% 19.99€ 0.58€

3. ShootMania Storm

Similarity 55% ShootMania the FPS “Powered By Players”ShootMania Storm is revolutionizing the multiplayer FPS by adding a community dimension and unlimited replayability. Developed by the Nadeo studio, renowned for community racing game, TrackMania, ShootMania Storm boasts quick-fire matches and epic battles, where only your talent will distinguish you... ShootMania Storm is a action, shooter and fps game developed by Nadeo and published by Ubisoft. Released on April 10th 2013 has received 854 reviews of which 729 were positive and 125 were negative resulting in a rating of 8.1 out of 10. Thanks to its incredible 98% discount, this game is now the #3 best deal in games like Half-Life: Opposing Force.
8.1
729
125

-98% 19.99€ 0.46€

4. Hard Reset Redux

Similarity 69% Hard Reset Redux is an action-packed and hardcore single-player shooter which embraces the best qualities that the genre has it offer. It includes over-the-top destruction, loads of enemies, great weapon variety, a challenging campaign and a beautifully realized cyberpunk setting. Hard Reset Redux is a action, fps and adventure game developed by Flying Wild Hog and published by Good Shepherd Entertainment. Released on June 03rd 2016 has received 2,245 reviews of which 1,823 were positive and 422 were negative resulting in a rating of 7.8 out of 10. Currently offered at a significant 98% discount, this title has earned the #4 position in the best deals for games like Half-Life: Opposing Force.
7.8
1,823
422

-98% 19.99€ 0.48€

5. F.E.A.R. 3

Similarity 56% 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 12,758 reviews of which 9,070 were positive and 3,688 were negative resulting in a rating of 7.0 out of 10. Currently offered at a significant 98% discount, this title has earned the #5 position in the best deals for games like Half-Life: Opposing Force.
7.0
9,070
3,688

-98% 19.99€ 0.45€

6. Alien Rage - Unlimited

Similarity 74% 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! Alien Rage - Unlimited is a action, shooter and fps game developed and published by CI Games. Released on September 24th 2013 has received 3,455 reviews of which 2,334 were positive and 1,121 were negative resulting in a rating of 6.6 out of 10. Currently offered at a significant 98% discount, this title has earned the #6 position in the best deals for games like Half-Life: Opposing Force.
6.6
2,334
1,121

-98% 19.99€ 0.54€

7. Enemy Front

Similarity 60% ENEMY FRONT is the first truly modern WW2 FPS, featuring stunning visuals, open-ended levels and a richly interactive combat experience that breaks out of the standard model of highly linear scripted FPS experiences, giving the player full freedom to own their playing style. Enemy Front is a action, fps and world war ii game developed and published by CI Games. Released on June 10th 2014 has received 5,436 reviews of which 3,599 were positive and 1,837 were negative resulting in a rating of 6.5 out of 10. Currently offered at a significant 98% discount, this title has earned the #7 position in the best deals for games like Half-Life: Opposing Force.
6.5
3,599
1,837

-98% 19.99€ 0.53€

8. Necromunda: Hired Gun

Similarity 58% Become a Hired Gun. The money’s good, the dog’s loyal, and the gun’s reliable. Embark on a fast-paced, violent, and thrilling FPS set in the darkest reaches of Warhammer 40,000’s most infamous hive city. Necromunda: Hired Gun is a action, warhammer 40k and adventure game developed by Streum On Studio and published by Focus Entertainment. Released on May 31st 2021 has received 7,422 reviews of which 4,864 were positive and 2,558 were negative resulting in a rating of 6.5 out of 10. Currently offered at a significant 98% discount, this title has earned the #8 position in the best deals for games like Half-Life: Opposing Force.
6.5
4,864
2,558

-98% 39.99€ 1.15€

9. Metal: Hellsinger

Similarity 55% Slay to the rhythm of metal and vengeance on an infernal journey through the eight Hells. Make them fear the beat. Metal: Hellsinger is a rhythm FPS bursting with demons, badass weapons, and heavy metal music. Metal: Hellsinger is a rhythm, fps and atmospheric game developed by The Outsiders and published by Funcom. Released on September 15th 2022 has received 15,766 reviews of which 15,140 were positive and 626 were negative resulting in an impressive rating of 9.4 out of 10. Currently offered at a significant 97% discount, this title has earned the #9 position in the best deals for games like Half-Life: Opposing Force.
9.4
15,140
626

-97% 29.99€ 1.09€

10. The Darkness II

Similarity 54% An intense first person shooter that delivers a twisted and gripping narrative of tragedy, modern crime drama, and supernatural horror. The Darkness II is a fps, action and gore game developed by Digital Extremes and published by 2K. Released on February 09th 2012 has received 19,772 reviews of which 18,121 were positive and 1,651 were negative resulting in a rating of 9.0 out of 10. Currently offered at a significant 97% discount, this title has earned the #10 position in the best deals for games like Half-Life: Opposing Force.
9.0
18,121
1,651

-97% 29.99€ 1.07€

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 June 16th 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 58% 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 177,041 reviews of which 123,333 were positive and 53,708 were negative resulting in a rating of 6.9 out of 10. With 2,275 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
123,333
53,708

2,275
players

2. Black Squad

Similarity 52% Black Squad is a free-to-play military first-person-shooter. Players can master their skills and show off their strategies with a wide range of game maps, modes, and weapons to choose from. Join thousands of FPS players worldwide in one of the most played games on Steam! Black Squad is a free to play, fps and shooter game developed by VALOFE and NS STUDIO and published by VALOFE. Released on June 26th 2019 has received 81,714 reviews of which 62,042 were positive and 19,672 were negative resulting in a rating of 7.5 out of 10. Thanks to its free to play tag and a daily player base of 212, this game has secured the #2 spot in the ranking of free games like Half-Life: Opposing Force.
7.5
62,042
19,672

212
players

3. Zula Global

Similarity 50% Zula is an intense free-to-play FPS in which you can play cooperatively with your teammates to overthrow the enemy side. You can enjoy new content weekly and receive gifts every day. Variety of maps and weapons from the real world so you can immerse yourself 100%. Zula Global is a free to play, fps and action game developed and published by Madbyte Games. Released on January 12th 2018 has received 7,595 reviews of which 5,310 were positive and 2,285 were negative resulting in a rating of 6.9 out of 10. Thanks to its free to play tag and a daily player base of 170, this game has secured the #3 spot in the ranking of free games like Half-Life: Opposing Force.
6.9
5,310
2,285

170
players

4. America's Army: Proving Grounds

Similarity 54% 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 10,952 reviews of which 8,637 were positive and 2,315 were negative resulting in a rating of 7.7 out of 10. Attracting a solid base of 132 players due to its free access, this strategy game has achieved the #4 position in the best free games like Half-Life: Opposing Force.
7.7
8,637
2,315

132
players

5. Hired Ops

Similarity 52% Hired Ops is a session-based online shooter dedicated to fierce conflicts between rival mercenary groups battling on a global scale. Hired Ops is a fps, multiplayer and free to play game developed by Absolut Soft LLC and published by . Released on April 13th 2021 has received 15,641 reviews of which 10,532 were positive and 5,109 were negative resulting in a rating of 6.6 out of 10. Attracting a solid base of 108 players due to its free access, this strategy game has achieved the #5 position in the best free games like Half-Life: Opposing Force.
6.6
10,532
5,109

108
players

6. TOXIKK™

Similarity 55% 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 5,811 reviews of which 4,485 were positive and 1,326 were negative resulting in a rating of 7.5 out of 10. The game currently holds the #6 spot among the most played free games like Half-Life: Opposing Force.
7.5
4,485
1,326

67
players

7. PAPERHEAD EP.0

Similarity 51% In this cute cardboard world, something went horribly wrong... You wake up in a prison cell. A strange voice calls to you from the depths of dark corridors covered in runic symbols and blood. Reload your trusty shotgun and find out... WHY WOULD CARDBOARD... BLEED? PAPERHEAD EP.0 is a fps, fast-paced and singleplayer game developed by Paperhead te4m and published by HypeTrain Digital. Released on November 14th 2024 has received 1,842 reviews of which 1,717 were positive and 125 were negative resulting in a rating of 8.9 out of 10. The game currently holds the #7 spot among the most played free games like Half-Life: Opposing Force.
8.9
1,717
125

44
players

8. Classic Marathon

Similarity 52% 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 932 reviews of which 856 were positive and 76 were negative resulting in a rating of 8.7 out of 10. The game currently holds the #8 spot among the most played free games like Half-Life: Opposing Force.
8.7
856
76

7
players

9. Shadow Warrior Classic (1997)

Similarity 70% 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 #9 spot among the most played free games like Half-Life: Opposing Force.
8.8
1,366
105

5
players

10. Pirate Fighting Simulator

Similarity 50% Pirate Fighting Simulator is a free multiplayer PVP game developed in UE5 in which you fight other players using typical pirate weaponry. Pirate Fighting Simulator is a fps, action and simulation game developed and published by Uncommon UTD. Released on November 13th 2023 has received 824 reviews of which 744 were positive and 80 were negative resulting in a rating of 8.5 out of 10. The game currently holds the #10 spot among the most played free games like Half-Life: Opposing Force.
8.5
744
80

5
players