Games Like Half-Life: Opposing Force

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.

Why similar: FPS 30.5%, Classic 18.5% ★, Silent Protagonist 11.2% ★, Aliens 8.5%, 1990's 5.6%

Why You'll Like It: It shares the same engine, setting, encounter design, and environmental storytelling, making it the closest overall match to Opposing Force.

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.

Why similar: FPS 53%, Classic 13.9% ★, Aliens 7.1%, Sci-fi 5.8%, Shooter 4.3%

Why You'll Like It: This is the other Black Mesa expansion, offering the same compact single-player structure and alternate-perspective storytelling.

Relive Half-Life.

Why similar: FPS 41.6%, Classic 19.7% ★, Aliens 8.8%, Sci-fi 7.6%, Shooter 5.5%

Why You'll Like It: It recreates Half-Life’s facility-to-disaster progression with modern presentation while keeping the same science-gone-wrong FPS feel.

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.

Why similar: FPS 45.7%, Classic 20.2% ★, Sci-fi 6.6%, Silent Protagonist 6.4% ★, Aliens 4.4%

Why You'll Like It: It evolves the same story-driven, linear shooter formula with strong pacing, immersive worldbuilding, and memorable combat set pieces.

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.

Why similar: FPS 59.2%, Aliens 9.2%, Sci-fi 8.3%, Shooter 6.7%, Military 5.5%

Why You'll Like It: You play a heavily armed military specialist in a linear sci-fi shooter campaign where human combat and alien threats constantly overlap.

Experience the original F.E.A.R. along with F.E.A.R. Extraction Point and F.E.A.R. Perseus Mandate.

Why similar: FPS 59.2%, Classic 21.4% ★, Shooter 5%, Action 3.9%, Sci-fi 2.4%

Why You'll Like It: Its tight corridor firefights, military framing, experimental-facility setting, and intense single-player action make it a strong spiritual cousin.

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.

Why similar: FPS 54.7%, Classic 16.9% ★, Sci-fi 7.1%, Shooter 6.6%, Action 4%

Why You'll Like It: It delivers a militarized sci-fi shooter campaign with scripted progression, grotesque enemies, and strong early-2000s FPS energy.

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.

Why similar: FPS 45.3%, Classic 27% ★, 1990's 5.2%, Sci-fi 4.9%, Shooter 4.6%

Why You'll Like It: Its straightforward sci-fi gunplay, industrial environments, and classic campaign structure line up well with Opposing Force’s old-school action focus.

FIGHT THE PAST TO SAVE THE FUTURE. STOP THE SINGULARITY. Learn the truth behind a massive cover-up of the catastrophic SINGULARITY, an event that fractured time and threatens the world as we know it. Armed with powerful, advanced weaponry and the experimental Time Manipulation Device, fight enemies from the past, the present, and...

Why similar: FPS 65.3%, Sci-fi 9.9%, Shooter 5.8%, Action 4.8%, Classic 4.3% ★

Why You'll Like It: This is another story-driven sci-fi FPS about a disastrous research site, strange enemies, and inventive weapons in a linear campaign.

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.

Why similar: FPS 41.5%, Classic 28.2% ★, Aliens 10.9%, Sci-fi 6.5%, Shooter 4.5%

Why You'll Like It: Its sci-fi corridors, alien enemies, and tense first-person combat capture a similar blend of military hardware and creature encounters.

A demonic invasion has overwhelmed the Union Aerospace Corporation's Mars research facility. As one of only a few survivors, you must fight your way to hell and back against a horde of demons in this award-winning horror/action FPS and reimagining of the original DOOM.

Why similar: FPS 53.6%, Classic 22.2% ★, Shooter 6.3%, Sci-fi 6%, Action 3.6%

Why You'll Like It: If you want more facility-based sci-fi shooting against monsters with heavier atmosphere, this is one of the closest fits.

World War II rages and nations fall. The Nazis are twisting science and the occult into an army capable of annihilating the Allies once and for all. As US Army Ranger William “B.J.” Blazkowicz, pierce the black heart of the Third Reich and stop them...or die trying.

Why similar: FPS 48.9%, Classic 31.9% ★, Shooter 4.8%, Action 4%, First-Person 2.9%

Why You'll Like It: Its linear campaign, strong combat rhythm, and blend of military action with nonhuman threats make it a natural classic-FPS recommendation.

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.

Why similar: FPS 45%, Classic 30.3% ★, Shooter 5.1%, 1990's 4.8%, Action 2.6%

Why You'll Like It: Its fast classic shooting, oppressive atmosphere, and monster-heavy campaign appeal to the same old-school FPS instincts Opposing Force taps into.

Prospekt begins in the Nova Prospekt prison in the Half-Life universe. Gordon Freeman is slowly being overrun by soldiers in the prison, however unknown to him, his Vortigaunt allies manage to find some help from a forgotten hero.

Why similar: FPS 63.2%, Sci-fi 10.6%, Action 8.6%, Shooter 8.4%, First-Person 5.6%

Why You'll Like It: This Half-Life-inspired campaign is rougher than Valve’s work, but its familiar gunplay and side-story structure clearly target the same audience.

SiN: Gold has returned! Free update for original owners!

Why similar: FPS 42.7%, Action 23.4%, Classic 15.7% ★, Shooter 7.1%, 1990's 4.8%

Why You'll Like It: As another late-90s story-focused FPS, it scratches the same itch for scripted action, experimental weapons, and classic shooter pacing.

Serious Sam is a high-adrenaline single-play and 16-player co-operative arcade-action FPS and Gamespot's Game of the Year 2001!

Why similar: FPS 49%, Classic 30.7% ★, Shooter 4.9%, Action 4.7%, Sci-fi 2.9%

Why You'll Like It: For players who mainly want old-school movement and heavy alien firefights, it delivers that classic single-player shooter rush in pure form.

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.

Why similar: FPS 50.6%, Classic 26.2% ★, Sci-fi 7.9%, Action 5%, Shooter 4.6%

Why You'll Like It: It offers a similarly direct single-player sci-fi shooter campaign built around labs, soldiers, and a disaster spiraling out of control.

Having defeated the Campaigner, Turok throws the Chronocepter into a waiting volcano to destroy it. Unfortunately the blast awakens an even deadlier force - The Primagen. Once again a Turok is tasked with restoring peace to the land and stopping the Primagen from merging Earth with the nether world.

Why similar: FPS 47%, Classic 28% ★, Action 3.8%, 1990's 3.5%, Sci-fi 3.3%

Why You'll Like It: Its late-90s campaign design, imaginative weapons, and alien-heavy combat make it a strong match for Opposing Force’s era and tone.

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.

Why similar: FPS 47.3%, Classic 27.9% ★, Sci-fi 6.3%, Shooter 5.4%, Action 3.9%

Why You'll Like It: Its mission-based sci-fi shooting and classic first-person campaign design make it a good retro companion to Opposing Force.

Sven Co-op is a co-operative game originally based around Valve Software's Half-Life. In this game players must work together against computer controlled enemies and solve puzzles as a team.

Why similar: FPS 54.7%, 1990's 12.2%, Shooter 10.8%, First-Person 6.8%, Action 4.7%

Why You'll Like It: It lets you revisit Half-Life-style maps, enemies, and gunplay in cooperative form, which makes it appealing if you mainly want more of that exact framework.

Experience the dramatic intensity of the frontlines of a war through the eyes of the first of a new breed of super soldiers in this gritty and epic first-person action game. An augmented super-soldier must stop a renegade regime from eradicating the civilized world. Hong Kong, 2065. 2nd Lt.

Why similar: FPS 47.8%, Classic 18.2% ★, Shooter 10.6%, Action 10.1%, Sci-fi 8.1%

Why You'll Like It: This is a compact military sci-fi FPS with linear missions, enhanced weapons, and the same early-2000s campaign-first sensibility.

In Prey, you awaken aboard Talos I, a space station orbiting the moon in the year 2032. You are the key subject of an experiment meant to alter humanity forever – but things have gone terribly wrong. The space station has been overrun by hostile aliens and you are now being hunted.

Why similar: FPS 48.1%, Sci-fi 15.9%, Aliens 13.5%, First-Person 6.2%, Action 3.8%

Why You'll Like It: While more immersive-sim leaning, it offers a compelling first-person sci-fi crisis full of environmental storytelling, hostile aliens, and experimental tech.

A world where time has no meaning - and evil knows no bounds. Torn from a world long gone, the time traveling warrior Turok has found himself thrust into a savage land torn by conflict.

Why similar: FPS 42.7%, Classic 29.2% ★, Shooter 6%, 1990's 5.4%, Action 4.4%

Why You'll Like It: Its first-person action, chunky weapon arsenal, and 90s campaign structure make it a decent match if you want more classic shooter adventuring.

Half-Life: Alyx is Valve’s VR return to the Half-Life series. It’s the story of an impossible fight against a vicious alien race known as the Combine, set between the events of Half-Life and Half-Life 2. Playing as Alyx Vance, you are humanity’s only chance for survival.

Why similar: FPS 45.7%, Aliens 14.7%, Sci-fi 9.5%, Shooter 8.9%, First-Person 5.7%

Half-Life Deathmatch: Source is a recreation of the first multiplayer game set in the Half-Life universe. Features all the classic weapons and most-played maps, now running on the Source engine.

Why similar: FPS 55.5%, Classic 18.8% ★, Action 7.8%, Sci-fi 6.8%, Shooter 6.8%

One of the most popular online action games of all time, Team Fortress Classic features over nine character classes -- from Medic to Spy to Demolition Man -- enlisted in a unique style of online team warfare. Each character class possesses unique weapons, items, and abilities, as teams compete online in a variety of game play modes.

Why similar: FPS 46.5%, Classic 27.2% ★, Action 10.1%, Shooter 6.3%, 1990's 5.3%

Fast multiplayer action set in the Half-Life 2 universe! HL2's physics adds a new dimension to deathmatch play. Play straight deathmatch or try Combine vs. Resistance teamplay. Toss a toilet at your friend today!

Why similar: FPS 67.6%, Action 11.4%, Shooter 7.5%, Sci-fi 6%, First-Person 4.7%

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.

Why similar: FPS 80.6%, Classic 10.2% ★, Shooter 4%, Military 1.7%, Action 1.6%

Enjoy fast-paced multiplayer gaming with Deathmatch Classic (a.k.a. DMC). Valve's tribute to the work of id software, DMC invites players to grab their rocket launchers and put their reflexes to the test in a collection of futuristic settings.

Why similar: FPS 43.6%, Classic 25.5% ★, Action 17.1%, Shooter 5.9%, First-Person 3.1%

With its extensive Tour of Duty campaign, a near-limitless number of skirmish modes, updates and new content for Counter-Strike's award-winning multiplayer game play, plus over 12 bonus single player missions, Counter-Strike: Condition Zero is a tremendous offering of single and multiplayer content.

Why similar: FPS 58.8%, Classic 17.5% ★, Shooter 8.8%, Action 7.4%, First-Person 3.6%

Play the enhanced version of the original game released on the Nintendo 64 in 1997. Years have passed since you stopped Hell’s invasion of Earth. Quarantined for humanity’s safety, the UAC research facilities on Mars were abandoned and forgotten...until now.

Why similar: FPS 41%, Classic 28.1% ★, 1990's 7.6%, Shooter 5%, Action 4.5%

The greatest warriors of all time and space have been summoned to battle for the amusement of an ancient alien race. Wield a variety of guns and power-ups as you fight for glory against ruthless combatants in this fast-paced single-player and multiplayer FPS.

Why similar: FPS 51.2%, Classic 28% ★, 1990's 4.8%, Shooter 4.6%, Action 3.5%

A futuristic action game that challenges your agility as well as your aim, Ricochet features one-on-one and team matches played in a variety of futuristic battle arenas.

Why similar: FPS 44.9%, Classic 24.1% ★, Action 17.9%, Sci-fi 4.7%, Shooter 4%

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.

Why similar: FPS 54.7%, Classic 24.2% ★, Shooter 7.7%, Action 5.8%, 1990's 3.2%

Just another mission, or so you thought… until aliens from another dimension start invading Earth before a scientist with a crowbar hospitalizes you after wiping out your entire squad. Just when you thought you were finished, a man with a briefcase offers you the chance for another beginning.

Why similar: FPS 54.2%, Military 11.5%, Shooter 10.6%, First-Person 7.3%, Moddable 5.7% ★

Serious Sam Classic: The Second Encounter is a high-adrenaline single-play and 16-player co-operative arcade-action FPS and Gamespot's Game of the Month February 2002!

Why similar: FPS 48.6%, Classic 28.5% ★, Action 5.3%, Shooter 5%, First-Person 3.2%

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.

Why similar: FPS 43.7%, Classic 28.8% ★, Sci-fi 8.7%, Action 6.4%, Shooter 4.2%

Serious Sam HD: The First Encounter is a visually upgraded and fully Steam supported remake version of the original high-adrenaline single-play and 16-player co-operative arcade-action FPS which was Gamespot's Game of the Year 2001 and which scored overall of 87% on Metacritic!

Why similar: FPS 59.6%, Classic 15.4% ★, Shooter 5.7%, Aliens 5.1%, Action 4.4%

Developed by id Software, and originally released in 1993 and 1994, the definitive, newly enhanced versions of DOOM + DOOM II are available as a combined product.

Why similar: FPS 42.3%, Classic 30.9% ★, 1990's 6.2%, Shooter 3.9%, Sci-fi 3.2%

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.

Why similar: FPS 50%, Classic 28.2% ★, Military 9.6%, Action 7.8%, Shooter 4.4%

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.

Why similar: FPS 58.5%, Classic 18.1% ★, Action 8.3%, Sci-fi 6.2%, Shooter 5.1%

The classic first person shooter from Crytek is back with the action-packed gameplay, sandbox world, and thrilling epic battles you loved the first time around – now with remastered graphics optimized for a new generation of hardware.

Why similar: FPS 53.2%, Aliens 13.9%, Shooter 10.2%, Sci-fi 9.8%, Action 5.3%

A new action-horror story set in the iconic Alien universe. Play as rogue Colonial Marine Zula Hendricks, sent to investigate a blacksite on Purdan. Fight and survive using your skill, reflexes, and determination against a deadly Xenomorph incursion in this gripping first chapter of a two-part saga.

Why similar: FPS 47.9%, Aliens 11%, Shooter 9.1%, Military 8.8%, Sci-fi 7.8%

The evil Empire is currently creating a doomsday army behind a veil of secrecy. However, they are no match for the Rebel Alliance's covert operations division. Your mission is to infiltrate the Empire and put an end to their plans for terror and domination.

Why similar: FPS 46.3%, Classic 10% ★, Shooter 9.2%, Sci-fi 8.2%, 1990's 7.3%

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?

Why similar: FPS 56.3%, Shooter 14.8%, First-Person 7.9%, Action 7.3%, Sci-fi 6.3%

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.

Why similar: FPS 51%, Classic 19.7% ★, Sci-fi 8%, Shooter 6.3%, Action 4.8%

Wolfenstein®: The New Order reignites the series that created the first-person shooter genre. Wolfenstein offers a deep game narrative packed with action, adventure and first-person combat.

Why similar: FPS 67.1%, Shooter 7.9%, Action 5.5%, Sci-fi 4.9%, First-Person 4.5%

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

Why similar: FPS 54.6%, Aliens 15.4%, Shooter 10.8%, Sci-fi 6.5%, Action 6.2%

Serious Sam is a high-adrenaline arcade-action shooter heavily focused on frantic action. In a world where cyberpunk meets fantasy-fiction and advanced technology is mixed with black magic and psycho-powers, Sam travels through four beautiful worlds, confronting countless foes on his way to Mental's base.

Why similar: FPS 51.1%, Classic 28.2% ★, Shooter 6.4%, Action 5.6%, First-Person 2.7%