- #1 Aliens: Fireteam Elite
97% matchMostly Positive80% of 27,025 reviews2021
Dev: Cold Iron Studios
Windows
Median: 4.7 hrsMean: 17.7 hrs≥1hr: 87%
Aliens: Fireteam Elite is a cooperative third-person survival game set in the iconic Alien Universe. Battle through hordes of different types of Xenomorph, customize your character and gear, and level-up as you try to contain this ever-growing threat.
Why similar: Aliens 22.4%, Co-op 16%, Online Co-Op 14.9%, Space 11.5%, Shooter 10.6%
Why You'll Like It: This is a squad-focused sci-fi co-op shooter built around classes, chokepoints, and relentless alien rushes that feel very close to bug-hunt missions.
- #2 HELLDIVERS™ 2
96% matchMostly Positive75% of 1,158,075 reviews2024
Dev: Arrowhead Game StudiosPub: PlayStation Publishing LLC
Windows
Median: 45.6 hrsMean: 106.9 hrs≥1hr: 98%
The Galaxy’s Last Line of Offence. Enlist in the Helldivers and join the fight for freedom across a hostile galaxy in a fast, frantic, and ferocious third-person shooter.
Why similar: Online Co-Op 23.7%, PvE 14.1%, Co-op 13.4%, Space 12.1%, Multiplayer 11.2%
Why You'll Like It: It delivers the closest modern match to Starship Troopers’ satirical military sci-fi tone and objective-based co-op battles against gigantic bug swarms.
- #3 EARTH DEFENSE FORCE 5
96% matchVery Positive94% of 11,514 reviews2019
Dev: SANDLOTPub: D3PUBLISHER
Windows
Median: 13.9 hrsMean: 41.2 hrs≥1hr: 93%
Stand and fight for humanity. This arcade shooter takes place in the year 2022, as the Earth Defense Force fends off an all-out attack by unknown life forms. Become an EDF soldier, battle against endless hordes of immense enemies, and restore peace to the earth.
Why similar: Aliens 20.3%, Online Co-Op 19.6%, Class-Based 14.2%, Co-op 13.8%, Sci-fi 8.9%
Why You'll Like It: Like Extermination, it is all about squad-based PvE mayhem, huge enemy counts, and the thrill of surviving impossible insect assaults.
- #4 Deep Rock Galactic
95% matchOverwhelmingly Positive97% of 379,294 reviews2020
Dev: Ghost Ship GamesPub: Coffee Stain Publishing
Windows
Median: 14.2 hrsMean: 76.4 hrs≥1hr: 94%
Deep Rock Galactic is a 1-4 player co-op FPS featuring dwarven space miners, procedurally-generated destructible environments, and endless hordes of alien monsters. Explore cave systems, mine for minerals, and work together to survive!
Why similar: Class-Based 21.3%, Co-op 15.9%, FPS 13.3%, PvE 10.7%, Space 9.6%
Why You'll Like It: Its first-person class co-op, bug-swarm combat, and constant objective pressure make it one of the best alternatives for teamwork-heavy extermination gameplay.
- #5 EARTH DEFENSE FORCE 6
94% matchMixed70% of 7,205 reviews2024
Dev: SANDLOTPub: D3PUBLISHER
Windows
Median: 29.3 hrsMean: 57.2 hrs≥1hr: 95%
Live the future of despair.The year is 2024 AD. The survivors fought against the remaining threats while trying their best to continue their recovery.Three years passed in the year 2027. In a new world without hope, the time has come to once again resist the fate of the Earth.
Why similar: Online Co-Op 22.5%, Shooter 14.1%, Sci-fi 13.9%, PvE 12.6%, Co-op 12.2%
Why You'll Like It: Few games match the sheer scale of fighting endless giant insects and alien invaders in chaotic co-op missions this well.
- #6 Earthfall
94% matchMixed65% of 2,306 reviews2018
Dev: Holospark
Windows
Median: 3.2 hrsMean: 6.8 hrs≥1hr: 87%
NOW AVAILABLE! When the Earth falls to an extra-terrestrial invasion, humanity becomes an endangered species. Earthfall is a four-player cooperative shooter that challenges players to survive hordes of ruthless alien drones and their inscrutable masters.
Why similar: Aliens 18.8%, Online Co-Op 18.8%, FPS 17%, Co-op 15.5%, Shooter 8%
Why You'll Like It: This Left 4 Dead-style co-op FPS swaps zombies for aliens and emphasizes deployables, defensive holds, and coordinated firepower.
- #7 Space Hulk: Deathwing Enhanced Edition
93% matchMostly Positive72% of 10,881 reviews2018
Dev: Streum On StudioPub: Focus Entertainment
Windows
Median: 3.0 hrsMean: 8.2 hrs≥1hr: 82%
Space Hulk: Deathwing - Enhanced Edition is a First-Person Shooter based on Games Workshop’s cult classic board game set in Warhammer 40,000 universe. Expanding upon the original game, and featuring a host of new content, new features and a richer multiplayer mode.
Why similar: Co-op 18.5%, FPS 18.2%, Online Co-Op 15.6%, Shooter 10.6%, Multiplayer 8.4%
Why You'll Like It: Its heavy sci-fi co-op shooting against hordes of close-quarters alien creatures captures a similar desperate last-stand feeling.
- #8 Warhammer 40,000: Space Marine 2
91% matchVery Positive84% of 222,956 reviews2024
Dev: Saber InteractivePub: Focus Entertainment
Windows
Median: 14.7 hrsMean: 40.5 hrs≥1hr: 96%
Embody the superhuman skill and brutality of a Space Marine. Unleash deadly abilities and devastating weaponry to obliterate the relentless Tyranid swarms. Defend the Imperium in spectacular third-person action in solo or multiplayer modes.
Why similar: Wargame 19.8%, Co-op 18.8%, PvE 13.5%, Multiplayer 12.4%, Space 11%
Why You'll Like It: The spectacle of battling massive Tyranid swarms with a military sci-fi squad gives it a lot of the same war-against-the-horde energy.
- #9 Warhammer 40,000: Darktide
91% matchMostly Positive72% of 137,919 reviews2022
Dev: Fatshark
Windows
Median: 24.0 hrsMean: 104.1 hrs≥1hr: 96%
Take back the city of Tertium from hordes of bloodthirsty foes in this intense and brutal action shooter. Warhammer 40,000: Darktide is the new co-op focused experience from the award-winning team behind the Vermintide series. As Tertium falls, Rejects Will Rise.
Why similar: Class-Based 25.2%, FPS 14.2%, Co-op 13.6%, PvE 10.7%, Realistic 9.1%
Why You'll Like It: Although grimier and more melee-heavy, its first-person co-op horde combat and objective-driven missions scratch a very similar PvE itch.
- #10 The Anacrusis
92% matchMixed47% of 1,887 reviews2023
Dev: Stray Bombay
Windows
Median: 2.8 hrsMean: 6.5 hrs≥1hr: 84%
Battle for survival against endless alien hordes with your friends! The Anacrusis is a first-person shooter that dynamically adjusts difficulty to you. Experience intense 1-4 player co-op action or play as the aliens and stop your friends in 1-8 player Versus mode. Full Steam Workshop support!
Why similar: FPS 17%, Co-op 15.4%, Space 14.2%, PvE 13.3%, Sci-fi 10.8%
Why You'll Like It: It offers four-player sci-fi FPS co-op with swarming alien encounters, gadgets, and a strong team-survival structure.
- #11 Tom Clancy’s Rainbow Six® Extraction
90% matchMixed66% of 3,158 reviews2023
Dev: Ubisoft MontrealPub: Ubisoft
Windows
Median: 2.8 hrsMean: 11.0 hrs≥1hr: 72%
Tom Clancy's Rainbow Six® Extraction is a tactical, co-op, PvE first-person shooter where you and your squad face an evolving alien threat. Teamwork, tactics, and flawless execution are key to your survival.
Why similar: Online Co-Op 18.7%, FPS 17.9%, PvE 12%, Shooter 9.4%, Aliens 8.1%
Why You'll Like It: It is a slower, more tactical PvE FPS, but fighting alien threats with small-team coordination makes it a natural fit.
- #12 Alien Swarm: Reactive Drop
89% matchVery Positive95% of 23,766 reviews2017
Dev: Reactive Drop Team
Windows
Median: 1.7 hrsMean: 10.0 hrs≥1hr: 63%
Co-operative top-down shooter game available for free. An epic bug hunt featuring a unique blend of co-op play and squad-level tactics.
Why similar: Class-Based 24.2%, Aliens 19.9%, Co-op 12.9%, PvE 10.5%, Sci-fi 9.3%
Why You'll Like It: This marine-vs-alien co-op shooter nails the teamwork, mission structure, and overwhelming enemy pressure despite its top-down view.
- #13 GTFO
89% matchVery Positive84% of 66,632 reviews2021
Dev: 10 Chambers
Windows
Median: 6.8 hrsMean: 27.2 hrs≥1hr: 92%
GTFO is a hardcore cooperative horror shooter that throws you from gripping suspense to explosive action in a heartbeat. Stealth, strategy, and teamwork are necessary to survive in your deadly, underground prison. Work together or die together.
Why similar: Online Co-Op 24.2%, FPS 19.1%, Co-op 17.6%, Shooter 11.5%, Multiplayer 11.5%
Why You'll Like It: It leans more tactical and tense, but the emphasis on squad communication, defensive positioning, and surviving monster waves is a strong match.
- #14 EARTH DEFENSE FORCE 4.1 The Shadow of New Despair
88% matchVery Positive95% of 10,529 reviews2016
Dev: SANDLOTPub: D3PUBLISHER
Windows
Median: 4.9 hrsMean: 21.3 hrs≥1hr: 89%
It's a fight for the future of the planet between the Ravagers, a merciless swarm of alien invaders, and the Earth Defense Force (EDF) in this third-person shooter.Play as four different classes in over 80 missions with a range of 800 weapons at your disposal.Co-op play supported.
Why similar: Aliens 26.3%, Online Co-Op 20.9%, Co-op 19.7%, Sci-fi 10.9%, Action 7.7%
Why You'll Like It: If mowing down giant insects with friends is the main appeal, this is still one of the purest co-op bug-war games on Steam.
- #15 World War Z
86% matchVery Positive82% of 32,437 reviews2021
Dev: Saber Interactive Inc
Windows
Median: 7.6 hrsMean: 35.1 hrs≥1hr: 90%
World War Z is a heart-pounding coop third-person shooter for up to 4 players featuring massive swarms of hundreds of zombies, focused on fast-paced, gruesomely spectacular action.
Why similar: Online Co-Op 24.6%, Co-op 16.5%, Multiplayer 15.5%, Shooter 10.5%, FPS 9.8%
Why You'll Like It: While zombie-themed, it captures the scale and panic of fighting absurdly large swarms in co-op objective missions.
- #16 Aliens: Colonial Marines Collection
87% matchMixed62% of 12,161 reviews2012
Dev: Gearbox SoftwarePub: SEGA
Windows
Median: 5.2 hrsMean: 15.3 hrs≥1hr: 76%
You & your friends are the deadliest killers in the galaxy – the US Colonial Marines. It’s up to you to not just survive, but wipe out the Xeno infestation.
Why similar: Aliens 23.6%, FPS 17.1%, Co-op 12.4%, Sci-fi 8.8%, Space 8.3%
Why You'll Like It: Its quality is uneven, but the space-marine-versus-xenomorph setup still overlaps heavily with Starship Troopers’ core fantasy.
- #17 RIPOUT
85% matchMixed60% of 1,209 reviews2024
Dev: Pet Project GamesPub: 3D Realms
Windows
Median: 1.7 hrsMean: 5.3 hrs≥1hr: 63%
Ripout is an online Co-Op horror FPS that will have players fight their way through procedurally generated derelict ships filled with mutants capable of reconfiguring their alien bodies. Survive with your trusty Pet Gun companion, collect loot, and customize your character to fit your playstyle.
Why similar: Online Co-Op 17.2%, Aliens 16.1%, FPS 15%, Space 10.1%, PvE 9.1%
Why You'll Like It: This co-op sci-fi FPS trades military spectacle for horror, but the corridor fights against mutating monsters feel similarly intense and survival-focused.
- #18 Space Beast Terror Fright
84% matchVery Positive92% of 1,795 reviews2022
Dev: nornware AB
Windows
Median: 1.9 hrsMean: 5.2 hrs≥1hr: 64%
S.B.T.F. is a very hard arcade-style / rogue-like / perma-death first person shooter. You play as Marines who must brave dark, claustrophobic and terrifyingly intense Space Beast infested spacecraft in order to extract critical data and lucrative upgrades. Can you make it out alive?
Why similar: Aliens 24.1%, FPS 18.9%, Co-op 18.5%, Sci-fi 8.8%, Space 7.9%
Why You'll Like It: This is a fast, brutal sci-fi co-op shooter about clearing infested ships where communication and disciplined fire matter a lot.
- #19 Killing Floor 2
84% matchVery Positive88% of 129,277 reviews2016
Dev: Tripwire Interactive
Windows
Median: 9.8 hrsMean: 85.9 hrs≥1hr: 92%
In KILLING FLOOR 2, players descend into continental Europe after it has been overrun by horrific, murderous clones called Zeds that were created by rogue elements of the Horzine Corporation. 6-player Co-Op & 12-player VS Zed-slaughtering mayhem.
Why similar: Online Co-Op 21%, FPS 18.6%, Co-op 16.8%, Shooter 12%, Multiplayer 11.8%
Why You'll Like It: Its wave-based co-op gunplay is more arcade-like, but it excels at the same frantic hold-the-line survival against charging hordes.
- #20 HELLDIVERS™ Dive Harder Edition
83% matchVery Positive90% of 33,359 reviews2015
Dev: Arrowhead Game StudiosPub: PlayStation Publishing LLC
Windows
Median: 4.7 hrsMean: 20.7 hrs≥1hr: 80%
HELLDIVERS™ is a hardcore, cooperative, twin stick shooter. As part of the elite unit called the HELLDIVERS, players must work together to protect SUPER EARTH and defeat the enemies of mankind in an intense intergalactic war.
Why similar: Online Co-Op 33.4%, Co-op 26.7%, Multiplayer 10.5%, Sci-fi 9.9%, Space 8%
Why You'll Like It: Despite the top-down perspective, it shares the same satirical "do your part" war vibe and co-op mission structure against alien hordes.
- #21 Void Crew
81% matchVery Positive86% of 8,426 reviews2024
Dev: Hutlihut GamesPub: Focus Entertainment
Windows
Median: 9.2 hrsMean: 16.8 hrs≥1hr: 94%
Void Crew is a Chaotic, Co-op Roguelite game for 1 to 6 players: Outfit your spaceship and crew for thrilling quests, brave fierce enemies in Space Battles... and try not to panic!
Why similar: Co-op 19.5%, Online Co-Op 15.6%, Space 13.9%, PvE 12.9%, Multiplayer 12.4%
Why You'll Like It: It is more about starship operations than infantry combat, yet the cooperative sci-fi mission teamwork makes it a reasonable stretch recommendation.
- #22 Back 4 Blood
82% matchMixed69% of 73,188 reviews2021
Dev: Turtle Rock StudiosPub: Warner Bros. Games
Windows
Median: 8.2 hrsMean: 44.0 hrs≥1hr: 91%
Back 4 Blood is a thrilling cooperative first-person shooter from the creators of the critically acclaimed Left 4 Dead franchise. Experience the intense 4 player co-op narrative campaign, competitive multiplayer as human or Ridden, and frenetic gameplay that keeps you in the action.
Why similar: Online Co-Op 25.1%, FPS 18.2%, Co-op 14.9%, Multiplayer 13.3%, Shooter 11.7%
Why You'll Like It: It modernizes the co-op horde-shooter formula with builds, specials, and constant pressure that fans of PvE squad shooters usually enjoy.
- #23 Left 4 Dead 2
82% matchOverwhelmingly Positive98% of 1,054,926 reviews2009
Dev: Valve
Windows · Linux
Median: 13.0 hrsMean: 100.0 hrs≥1hr: 93%
Set in the zombie apocalypse, Left 4 Dead 2 is a co-operative action horror FPS takes you and your friends through the cities, swamps and cemeteries of the Deep South, from Savannah to New Orleans across five expansive campaigns.
Why similar: Co-op 24.4%, FPS 23.2%, Online Co-Op 17.7%, Multiplayer 13.8%, Shooter 10.8%
Why You'll Like It: It remains one of the best examples of tightly designed co-op FPS horde survival and team-dependent mission pacing.
- #24 Sker Ritual
80% matchVery Positive82% of 5,997 reviews2024
Dev: Wales InteractivePub: Skybound Games
Windows
Median: 3.7 hrsMean: 7.7 hrs≥1hr: 88%
Tear through endless waves of supernatural enemies in this co-op horror horde shooter. Play solo or with up to 4 players, unleash god-like Miracle powers, supercharge your arsenal, and survive devastating boss encounters on Sker Island.
Why similar: Co-op 19.3%, Online Co-Op 15.2%, FPS 13.9%, PvE 9.6%, Multiplayer 8.9%
Why You'll Like It: It is a round-based co-op FPS with strong wave defense and perk progression, making it a good pick if you mainly want more squad survival shooting.
- #25 REMNANT II®
79% matchVery Positive82% of 68,331 reviews2023
Dev: Gunfire GamesPub: Arc Games
Windows
Median: 17.3 hrsMean: 37.7 hrs≥1hr: 94%
REMNANT II® pits survivors of humanity against new deadly creatures and god-like bosses across terrifying worlds. Play solo or co-op with two other friends to explore the depths of the unknown to stop an evil from destroying reality itself.
Why similar: Co-op 25.1%, Online Co-Op 21.4%, Shooter 14.8%, Multiplayer 11.7%, PvE 10.4%
Why You'll Like It: It is less swarm-centric, but the co-op gunplay, class builds, and punishing PvE encounters make it a strong alternative for squad shooter fans.
- #26 Starship Troopers: Ultimate Bug War!
77% matchVery Positive93% of 1,410 reviews2026
Dev: Auroch DigitalPub: Dotemu
Windows
Median: 3.5 hrsMean: 10.5 hrs≥1hr: 84%
Lock and load into the Starship Troopers universe and join the Mobile Infantry in the most realistic depiction of war ever made! Experience an original story in this action-packed, first-person retro shooter. Would you like to know more?
Why similar: Aliens 18.5%, Sci-fi 17.9%, Wargame 13.9%, FPS 11.7%, Shooter 10%
- #27 Warhammer: Vermintide 2
79% matchVery Positive85% of 147,366 reviews2018
Dev: Fatshark
Windows
Median: 8.2 hrsMean: 48.7 hrs≥1hr: 84%
The critically acclaimed Vermintide 2 is a visually stunning and groundbreaking melee action game pushing the boundaries of the first person co-op genre. Join the fight now!
Why similar: Co-op 23.9%, Online Co-Op 20.3%, PvE 12.9%, Multiplayer 11.4%, FPS 10.9%
Why You'll Like It: It shifts to fantasy melee, but its excellent team play, objective runs, and crushing horde pressure echo Extermination’s co-op rhythm.
- #28 Jump Space
76% matchVery Positive85% of 12,088 reviews2025
Dev: Keepsake Games
Windows
Median: 6.3 hrsMean: 11.4 hrs≥1hr: 92%
Jump Space (formerly Jump Ship) is a mission based co-op PvE for 1-4 players, where you are the crew of a spaceship. Transition seamlessly from crewing the ship to on-foot exploration and space walks. Explore, upgrade, and survive intense encounters in deep space together.
Why similar: FPS 14.5%, Space 14.3%, Co-op 14.1%, PvE 11.1%, Sci-fi 10.4%
- #29 Interstellar Marines
81% matchMixed53% of 7,876 reviews2013
Dev: Zero Point Software
Windows · Mac · Linux
Median: 48 minMean: 6.8 hrs≥1hr: 45%
UPDATE 28 AVAILABLE - Interstellar Marines is an immersive tactical sci-fi First Person Simulator in the making, offering a unique blend of tactical gameplay, dynamic environments and non-scripted AI. Play Singleplayer or Co-op/PvP on servers around the world.
Why similar: FPS 21.7%, Co-op 18.1%, Sci-fi 12.1%, Multiplayer 11.3%, Shooter 9%
Why You'll Like It: It offers a grounded, tactical sci-fi FPS feel with co-op and a marine-on-hostile-world atmosphere that aligns well with the seed game.
- #30 Strange Brigade
78% matchVery Positive84% of 11,300 reviews2018
Dev: Rebellion
Windows
Median: 3.7 hrsMean: 9.4 hrs≥1hr: 86%
Embark on an exotic journey into danger in this rip-roaring 1930s third person adventure for 1-4 players! Encounter pulse-pounding action, treacherous traps and tales of derring-do!
Why similar: Co-op 25.9%, Online Co-Op 24.6%, Shooter 15%, Multiplayer 14.4%, PvE 10%
Why You'll Like It: This co-op shooter emphasizes set-piece defenses, teamwork, and fighting off large enemy groups even if the setting is pulp adventure instead of sci-fi.
- #31 Species: Unknown
74% matchVery Positive95% of 10,790 reviews2025
Dev: WanadevStudio
Windows
Median: 5.0 hrsMean: 8.4 hrs≥1hr: 92%
Species: Unknown is a 1 to 4 players co-op survival horror. Complete high-risk missions aboard an abandoned ship while being hunted by an unknown creature. Survive and upgrade your gear to face each new threat that lurks in the dark.
Why similar: Aliens 19.1%, Online Co-Op 18.8%, FPS 10.8%, PvE 8.3%, Space 8.1%
- #32 Generation Zero®
78% matchMostly Positive72% of 42,150 reviews2019
Dev: Systemic Reaction™Pub: Avalanche Studios
Windows
Median: 4.7 hrsMean: 19.5 hrs≥1hr: 90%
Generation Zero is a stealth-action shooter where you wage guerilla warfare against lethal mechanical enemies. Explore a vast open world map inspired by the Swedish Cold War era, take part in the resistance alone or with up to three friends in seamless co-op.
Why similar: Base Building 19%, FPS 17%, Co-op 15.9%, PvE 11.5%, Sci-fi 11.4%
Why You'll Like It: Its open-world structure is different, but co-op first-person firefights against dangerous machine enemies recreate a similar squad-in-the-field tension.
- #33 John Carpenter's Toxic Commando
75% matchMostly Positive74% of 7,111 reviews2026
Dev: Saber InteractivePub: Focus Entertainment
Windows
Median: 9.2 hrsMean: 16.4 hrs≥1hr: 93%
Pick a character and team up with three friends ‘cause it’s time to save the world. Experience intense FPS action as you obliterate hordes of terrifying monsters! You may not be on the best team of mercenaries, but you are… a Toxic Commando!
Why similar: Online Co-Op 20.9%, FPS 17.3%, PvE 12.7%, Shooter 11.9%, Co-op 10.3%
- #34 Starship Troopers: Terran Command
75% matchVery Positive87% of 12,012 reviews2022
Dev: The ArtistocratsPub: Slitherine Ltd.
Windows
Median: 3.4 hrsMean: 10.3 hrs≥1hr: 83%
Lead the Mobile Infantry in this RTS game set in the Starship Troopers film universe. Balance your army composition with a diverse set of unit types, overcome line-of-sight and line-of-fire challenges through tactical positioning, and use special abilities to smash the Arachnid hordes!
Why similar: Wargame 44.3%, Sci-fi 26.2%, Aliens 22.9%, Singleplayer 5.5%, Action 1.2%
- #35 Angels Fall First
73% matchVery Positive81% of 4,045 reviews2026
Dev: Strangely Interactive Ltd
Windows
Median: 1.5 hrsMean: 5.4 hrs≥1hr: 63%
From commanding the battle standing on the bridge of your flagship all the way down to tactical infantry firefights - AFF brings together all the combat you ever loved in a rich science fiction setting. Boarding, pilotable capital ships, deep weapon customization and full Bot support included!
Why similar: FPS 16.8%, Space 15.6%, Co-op 13.7%, Sci-fi 11.8%, Multiplayer 10.3%
- #36 Natural Selection 2
77% matchVery Positive85% of 13,364 reviews2012
Dev: Unknown Worlds Entertainment
Windows
Median: 2.9 hrsMean: 24.3 hrs≥1hr: 85%
A fast paced multiplayer shooter that pits aliens against humans in a strategic and action-packed struggle for survival!
Why similar: FPS 23.5%, Aliens 19.4%, Multiplayer 15.6%, Sci-fi 11.3%, Co-op 7%
- #37 Deep Rock Galactic: Rogue Core
73% matchMixed60% of 15,144 reviews2026
Dev: Ghost Ship GamesPub: Ghost Ship Publishing
Windows
Median: 11.0 hrsMean: 20.0 hrs≥1hr: 95%
DEEP ROCK GALACTIC: ROGUE CORE is a 1-4 player co-op FPS action roguelite featuring sci-fi dwarves, alien horrors and procedurally-generated caves. Join the elite dwarven Reclaimers and fight through perilous mining facilities infested with deadly Corespawn. For Rock and Stone!
Why similar: FPS 16.6%, Co-op 15.2%, Online Co-Op 14%, PvE 11.8%, Sci-fi 8.7%
- #38 Silica
73% matchMostly Positive76% of 4,893 reviews2023
Dev: Martin 'Dram' MelichárekPub: Bohemia Interactive
Windows
Median: 3.1 hrsMean: 8.8 hrs≥1hr: 75%
Silica blends FPS and RTS in epic, photorealistic battles. Choose to fight on the ground or command from above as humans or aliens. Dive into thrilling multiplayer combat or master strategic command. Are you ready to survive and conquer?
Why similar: Aliens 19.8%, FPS 16.4%, Multiplayer 10.3%, Sci-fi 10%, Shooter 9.9%
- #39 Mycopunk
71% matchVery Positive89% of 4,663 reviews2025
Dev: Pigeons at PlayPub: Devolver Digital
Windows
Median: 5.1 hrsMean: 15.5 hrs≥1hr: 84%
Cut through fungal aliens in this hyper-customizable, mission based looter shooter. Hundreds of hand-crafted upgrades, 4-player co-op, and a little roach man. What’s not to love?
Why similar: Online Co-Op 21.4%, FPS 19.1%, PvE 11.3%, Co-op 10.9%, Shooter 10.1%
- #40 PULSAR: Lost Colony
72% matchVery Positive90% of 5,732 reviews2021
Dev: Leafy Games
Windows · Mac · Linux
Median: 7.3 hrsMean: 16.7 hrs≥1hr: 87%
The co-op open-world space sim where everyone has a role! Pilot the ship. Reroute power. Launch nukes. Explore alien planets. Research new talents. Work together to find the Lost Colony! ...or just deliver some biscuits
Why similar: Class-Based 17.7%, Co-op 12.9%, Space 12.6%, Online Co-Op 10.9%, FPS 10.2%
- #41 Earth Defense Force: Insect Armageddon
74% matchVery Positive87% of 1,153 reviews2011
Dev: Vicious Cycle Software, Inc.Pub: D3PUBLISHER
Windows
Median: 2.5 hrsMean: 8.5 hrs≥1hr: 67%
Thousands of giant insects and aliens once again ravage the earth, and only the Earth Defense Force can stop them.
Why similar: Online Co-Op 26%, Co-op 25.9%, Aliens 15.3%, Action 14.6%, Sci-fi 11.5%
- #42 Aliens vs. Ghosts
71% matchVery Positive90% of 628 reviews2022
Dev: Sayan
Windows
Use Nukes, Electricity, Heat Rays and powerful Minions in this wave-based first person shooter providing endless hours of Ghost-slaying entertainment, solo or Co-Op. Only Ghosts stand in the way of your invasion of Earth.
Why similar: Class-Based 18.3%, FPS 15.3%, Shooter 10.7%, Aliens 10.6%, Sci-fi 7.6%
- #43 MechWarrior 5: Mercenaries
71% matchVery Positive85% of 15,811 reviews2021
Dev: Piranha Games Inc.
Windows
Median: 9.8 hrsMean: 54.5 hrs≥1hr: 85%
The year is 3015. The battlefields are dominated by war machines known as BattleMechs. Level entire cities and decimate the enemy in your BattleMech. Follow a quest for glory and revenge. Manage an expanding mercenary company. Fight alongside your friends with a four-player PvE co-op.
Why similar: FPS 18.2%, Online Co-Op 17%, Co-op 16.2%, Shooter 11.5%, First-Person 9%
- #44 Aliens: Dark Descent
69% matchVery Positive88% of 18,705 reviews2023
Dev: Tindalos InteractivePub: Focus Entertainment
Windows
Median: 4.3 hrsMean: 15.1 hrs≥1hr: 87%
Drop into the gripping journey of Aliens: Dark Descent, a squad-based, single-player action game in the iconic Alien franchise. Lead your soldiers in real-time to stop a new and terrifying kind of Xenomorph outbreak on Planet Lethe.
Why similar: Aliens 34.4%, Sci-fi 21.5%, Space 17.8%, Action 9.6%, Combat 8.6%
- #45 Executive Assault 2
70% matchVery Positive83% of 1,764 reviews2023
Dev: Hesketh Studios Ltd
Windows · Mac
Median: 3.7 hrsMean: 8.2 hrs≥1hr: 76%
The RTS/FPS phenomenon has moved into space! Build your base on an asteroid, command fleets of starships for epic battles, pilot fighters, mine and trade resources, assemble robots to defend or assault other stations. Take sole command or share the glory as you fight for control of the quadrant.
Why similar: Base Building 20.4%, Space 15.7%, FPS 15.5%, Co-op 10.3%, Multiplayer 9.2%
- #46 No More Room in Hell 2
69% matchMixed54% of 25,427 reviews2026
Dev: Torn Banner Studios
Windows
Median: 8.2 hrsMean: 24.6 hrs≥1hr: 90%
No More Room in Hell 2 is an intense 8 player zombie shooter. Overcome the endless undead. Avoid infection. Survive hell together.
Why similar: Online Co-Op 23.1%, Co-op 17.4%, FPS 16.2%, Multiplayer 13.1%, Shooter 10%
- #47 Shatterline
69% matchMostly Positive73% of 29,161 reviews2025
Dev: Frag Lab LLC
Windows
Median: 1.9 hrsMean: 16.2 hrs≥1hr: 65%
Get ready for the apocalypse! Shatterline is a high-octane single-player FPS adventure where Earth’s survival hangs in the balance. Pick a unique operator and combat the alien plague!
Why similar: FPS 15.1%, PvE 10.8%, Sci-fi 10.4%, Shooter 10.2%, Online Co-Op 9.6%
- #48 Truxton Extreme
68% matchVery Positive95% of 85 reviews2026
Dev: TatsujinPub: Clear River Games AB
Windows
Take down hordes of alien invaders with your Power Shot, Truxton Beam, Thunder Laser, Homing Shot, Star‑mine Shot, and more! Don't forget to breathe as you face off against gigantic bosses in the ultimate battle for humanity’s survival!
Why similar: Space 20.4%, Co-op 16.8%, Sci-fi 14.9%, PvE 14.4%, Arcade 12.9%
- #49 Over The Top: WWI
67% matchVery Positive83% of 7,385 reviews2026
Dev: Flying Squirrel EntertainmentPub: GG Publishing
Windows
Median: 3.5 hrsMean: 8.1 hrs≥1hr: 82%
Join 200-player battles in Over The Top: WWI - an intense shooter set in the gritty backdrop of World War I. Pick your class, choose from a vast arsenal, including rifles, artillery, airplanes and powerful tanks, and experience the chaos of fully destructible battlefields.
Why similar: FPS 23%, Multiplayer 15.8%, Shooter 14.7%, Realistic 13.6%, PvE 11.4%
- #50 EARTH DEFENSE FORCE: IRON RAIN
72% matchMixed59% of 1,529 reviews2019
Dev: YUKE'SPub: D3PUBLISHER
Windows
Median: 5.0 hrsMean: 12.9 hrs≥1hr: 92%
Save the world without hope. Year 2040. An action TPS where you will become one of the EDF soldiers and fight against the invaders from outer space which ruined the world. In the world settings which differs from the original "EARTH DEFENSE FORCE" series, more than 50 missions in five difficulties await for your challenge.
Why similar: Aliens 21.1%, Class-Based 18.2%, Action 14.9%, Online Co-Op 14.6%, Co-op 13.3%
- #51 Deadzone: Rogue
66% matchVery Positive82% of 16,323 reviews2025
Dev: Prophecy Games
Windows
Median: 10.5 hrsMean: 19.9 hrs≥1hr: 94%
Deadzone: Rogue is a roguelite FPS set in space. Blast through swarms of hostile machines, combine powerful augments and elements to forge your build, and grow stronger with each run — solo or in co-op.
Why similar: Online Co-Op 23.7%, FPS 21.4%, PvE 14.3%, Sci-fi 11.5%, Shooter 11.1%
- #52 Galactic Force
70% matchMostly Positive72% of 89 reviews2018
Dev: FreezeNova
Windows
Galactic Force is a sci-fi FPS loaded with frantic action and lots of firepower.
Why similar: FPS 15.2%, Arena Shooter 14.7%, Aliens 13.6%, Co-op 10.9%, Sci-fi 9.1%
- #53 Rogue Point
66% matchMixed65% of 1,193 reviews2026
Dev: Crowbar CollectivePub: Team17
Windows
Median: 2.5 hrsMean: 6.0 hrs≥1hr: 77%
From the creators of Black Mesa: Welcome to Rogue Point! A 4-player co-op shooter where teamwork is everything. Join forces on intense missions with evolving objectives and powerful upgrades. Plan, Adapt, and Overcome. Your squad’s survival depends on it.
Why similar: Co-op 16.1%, FPS 14.5%, PvE 12.7%, Online Co-Op 11.5%, Shooter 8.4%
- #54 Killing Floor 3
67% matchMixed44% of 23,413 reviews2025
Dev: Tripwire Interactive
Windows
Median: 12.3 hrsMean: 43.4 hrs≥1hr: 93%
It’s 2091 and megacorp Horzine has produced the ultimate army: an obedient horde of bioengineered monsters called zeds. Now, join the rebel group Nightfall in this co-op action/horror FPS that puts you and your teammates in a battle for the future of humanity.
Why similar: FPS 19.2%, Co-op 16.3%, PvE 12.8%, Shooter 10.8%, First-Person 8.1%
- #55 Alien Swarm
68% matchVery Positive95% of 21,613 reviews2010
Dev: Valve
Windows
Median: 2.4 hrsMean: 35.9 hrs≥1hr: 65%
Co-operative multiplayer game and complete code base available for free.
Why similar: Co-op 20.2%, Aliens 19.3%, Online Co-Op 15.1%, Class-Based 10.4%, Multiplayer 9.7%
- #56 Stellar Survivor
70% matchMixed66% of 175 reviews2019
Dev: Sticks & Stones
Windows
Stranded on an alien planet, you must defend your Powercore! Use your weapons to fight hordes of alien enemies and strategically use traps in this new FPS tower-defense survival game!
Why similar: Co-op 18.5%, Aliens 17.3%, Multiplayer 12.6%, FPS 10%, Sci-fi 8.5%
- #57 StarRupture
63% matchVery Positive81% of 13,247 reviews2026
Dev: Creepy Jar
Windows
Median: 6.8 hrsMean: 26.2 hrs≥1hr: 89%
StarRupture is a first-person open world base-building game with advanced combat and tons of exploration. Play alone or in a group on this sublime and ever-changing planet, extract and manage resources, create your complex industrial system and fight off hordes of alien monsters.
Why similar: Base Building 23.1%, Co-op 18.2%, Online Co-Op 16.8%, Sci-fi 12.6%, Multiplayer 12%