Best Online Co-Op games on Steam
Unlike generic lists, our strategy game recommendations use a rigorous analysis of Steam user reviews to identify and feature only the best, community-validated online co-op games. For those who prefer not to search, lists of the most played, top deals and best free online co-op games are available at the bottom of the page.
Filters & Lists
Left 4 Dead
From Valve (the creators of Counter-Strike, Half-Life and more) comes Left 4 Dead, a co-op action horror game for the PC and Xbox 360 that casts up to four players in an epic struggle for survival against swarming zombie hordes and terrifying mutant monsters.
Zombie Panic! Source
Dive into the zombie apocalypse with Zombie Panic! Source: a cooperative, survival-horror first-person-shooter. A fast-paced standalone modification.
Tom Clancy's Rainbow Six® Vegas 2
Tom Clancy's Rainbow Six® Vegas 2 - the sequel to the award-winning next-generation first-person shooter - returns to Sin City. Tom Clancy's Rainbow Six Vegas 2 is your last chance to rescue America's sexiest city from an escalating terrorist siege that will force you into heart-pounding action from beginning to end.
Tom Clancy's Rainbow Six® Vegas
Tom Clancy's Rainbow Six makes its next-generation hardware debut in the most dramatic installment of the renowned first-person shooter franchise to date. Rainbow operatives take to the chaotic streets of Las Vegas as an escalating terrorist siege in 'Sin City' threatens to take world terrorism to new, uncontrollable heights.
Team Fortress 2
Nine distinct classes provide a broad range of tactical abilities and personalities. Constantly updated with new game modes, maps, equipment and, most importantly, hats!
Company of Heroes: Opposing Fronts
The next chapter in the #1 rated RTS franchise thrusts players into a hellish war torn landscape to command two battle-hardened armies in relentless campaigns for honor and country. Players lead the tenacious British 2nd Army during the heroic World War II liberation of Caen, France, and command the German Panzer Elite as they struggle...
Garry's Mod
Garry's Mod is a physics sandbox. There aren't any predefined aims or goals. We give you the tools and leave you to play.
Call of Duty® 2
Call of Duty® 2 redefines the cinematic intensity and chaos of battle as seen through the eyes of ordinary soldiers fighting together in epic WWII conflicts. The sequel to 2003's Call of Duty, winner of over 80 Game of the Year awards, Call of Duty 2 offers more immense, more intense, more realistic battles than ever before, thanks to...
Counter-Strike: Condition Zero
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.
Team Fortress Classic
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.
Resident Evil 6 Benchmark Tool
Download the official Resident Evil 6 PC Benchmark and see if your system is ready for Capcom's latest installment of the Resident Evil franchise!
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!Most played online co-op games on Steam
Take a look at the top online co-op games that are currently attracting the largest player bases on the Steam platform, as of April 27th 2025.
1. R.E.P.O.
An online co-op horror game with up to 6 players. Locate valuable, fully physics-based objects and handle them with care as you retrieve and extract to satisfy your creator's desires. R.E.P.O. is a horror, online co-op and comedy game developed and published by semiwork. Released on February 26th 2025 has received 128,492 reviews of which 124,038 were positive and 4,454 were negative resulting in an impressive rating of 9.5 out of 10. The game has hit the top spot as the #1 most played online co-op game, thanks to its 100,447 peak concurrent players over the last day.
9.5
124,038
4,454
100,447
players
2. DayZ
How long can you survive a post-apocalyptic world? A land overrun with an infected "zombie" population, where you compete with other survivors for limited resources. Will you team up with strangers and stay strong together? Or play as a lone wolf to avoid betrayal? This is DayZ – this is your story. DayZ is a survival, open world and online co-op game developed and published by Bohemia Interactive. Released on December 13th 2018 has received 425,469 reviews of which 326,033 were positive and 99,436 were negative resulting in a rating of 7.6 out of 10. While seeing 44,936 players online at once in the last 24 hours, this game is currently ranked #2 among online co-op games based on player count.
7.6
326,033
99,436
44,936
players
3. Dead by Daylight
Trapped forever in a realm of eldritch evil where even death is not an escape, four determined Survivors face a bloodthirsty Killer in a vicious game of nerve and wits. Pick a side and step into a world of tension and terror with horror gaming's best asymmetrical multiplayer. Dead by Daylight is a horror, multiplayer and survival horror game developed and published by Behaviour Interactive Inc.. Released on June 14th 2016 has received 790,041 reviews of which 624,264 were positive and 165,777 were negative resulting in a rating of 7.9 out of 10. While seeing 43,487 players online at once in the last 24 hours, this game is currently ranked #3 among online co-op games based on player count.
7.9
624,264
165,777
43,487
players
4. HELLDIVERS™ 2
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. HELLDIVERS™ 2 is a online co-op, pve and third-person shooter game developed by Arrowhead Game Studios and published by PlayStation Publishing LLC. Released on February 08th 2024 has received 988,383 reviews of which 753,774 were positive and 234,609 were negative resulting in a rating of 7.6 out of 10. With 26,947 concurrent players in the last 24 hours, the game currently holds the #4 spot among the most played online co-op games.
7.6
753,774
234,609
26,947
players
5. Valheim
A brutal exploration and survival game for 1-10 players, set in a procedurally-generated purgatory inspired by viking culture. Battle, build, and conquer your way to a saga worthy of Odin’s patronage! Valheim is a open world survival craft, survival and online co-op game developed by Iron Gate AB and published by Coffee Stain Publishing. Released on February 02nd 2021 has received 495,832 reviews of which 467,909 were positive and 27,923 were negative resulting in an impressive rating of 9.4 out of 10. With 26,847 concurrent players in the last 24 hours, the game currently holds the #5 spot among the most played online co-op games.
9.4
467,909
27,923
26,847
players
6. Phasmophobia
Phasmophobia is a 4 player online co-op psychological horror. Paranormal activity is on the rise and it’s up to you and your team to use all the ghost-hunting equipment at your disposal in order to gather as much evidence as you can. Phasmophobia is a horror, online co-op and multiplayer game developed and published by Kinetic Games. Released on September 18th 2020 has received 763,742 reviews of which 731,927 were positive and 31,815 were negative resulting in an impressive rating of 9.5 out of 10. With 16,127 concurrent players in the last 24 hours, the game currently holds the #6 spot among the most played online co-op games.
9.5
731,927
31,815
16,127
players
7. Bloons TD 6
The Bloons are back and better than ever! Get ready for a massive 3D tower defense game designed to give you hours and hours of the best strategy gaming available. Bloons TD 6 is a tower defense, strategy and multiplayer game developed and published by Ninja Kiwi. Released on December 17th 2018 has received 351,221 reviews of which 341,651 were positive and 9,570 were negative resulting in an impressive rating of 9.6 out of 10. With 11,619 concurrent players in the last 24 hours, the game currently holds the #7 spot among the most played online co-op games.
9.6
341,651
9,570
11,619
players
8. Enshrouded
You are Flameborn, last ember of hope of a dying race. Awaken, survive the terror of a corrupting fog, and reclaim the lost beauty of your kingdom. Venture into a vast world, vanquish punishing bosses, build grand halls and forge your path in this co-op survival action RPG for up to 16 players. Enshrouded is a open world, survival and base-building game developed and published by Keen Games GmbH. Released on January 24th 2024 has received 74,320 reviews of which 64,423 were positive and 9,897 were negative resulting in a rating of 8.5 out of 10. With 10,282 concurrent players in the last 24 hours, the game currently holds the #8 spot among the most played online co-op games.
8.5
64,423
9,897
10,282
players
9. Supermarket Together
The multiplayer supermarket has arrived to your neighbourhood for free! Stock your shop space, unlock perks and franchises, hire employees or chase those pesky shoplifters. The more players, the more action! Supermarket Together is a simulation, online co-op and multiplayer game developed and published by DeadDevsTellNoLies. Released on August 09th 2024 has received 64,362 reviews of which 61,131 were positive and 3,231 were negative resulting in an impressive rating of 9.3 out of 10. With 6,875 concurrent players in the last 24 hours, the game currently holds the #9 spot among the most played online co-op games.
9.3
61,131
3,231
6,875
players
10. Dying Light
First-person action survival game set in a post-apocalyptic open world overrun by flesh-hungry zombies. Roam a city devastated by a mysterious virus epidemic. Scavenge for supplies, craft weapons, and face hordes of the infected. Dying Light is a zombies, survival horror and horror game developed and published by Techland. Released on January 27th 2025 has received 454,205 reviews of which 432,444 were positive and 21,761 were negative resulting in an impressive rating of 9.4 out of 10. With 5,931 concurrent players in the last 24 hours, the game currently holds the #10 spot among the most played online co-op games.
9.4
432,444
21,761
5,931
players
Best deals on online co-op games on Steam
Discover fantastic savings with the best discounts on a variety of online co-op games available on Steam right now, updated on April 27th 2025. Looking for even more deals? Use the search filters to explore a wider range of discounted online co-op games.
1. Warhammer: End Times - Vermintide
Vermintide is an epic co-operative action combat adventure set in the End Times of the iconic Warhammer Fantasy world. Warhammer: End Times - Vermintide is a action, online co-op and co-op game developed and published by Fatshark. Released on October 23rd 2015 has received 21,040 reviews of which 16,839 were positive and 4,201 were negative resulting in a rating of 7.9 out of 10. Featuring a massive 95% discount, this game currently holds the #1 spot in the best deals for online co-op category.
7.9
16,839
4,201
-95%
29.20€
1.46€
2. This Means Warp
It’s co-op space survival fun, Jim, but not as we know it. This Means Warp is an intense spaceship management roguelite experience for 1-4 players. Explore a procedurally generated universe, upgrade your ship, battle dangerous enemies and adapt your strategies to survive in a hostile galaxy. This Means Warp is a survival, online co-op and space game developed by Outlier and published by Jagex Ltd. Released on May 04th 2023 has received 619 reviews of which 445 were positive and 174 were negative resulting in a rating of 6.9 out of 10. Thanks to its incredible 95% discount, this game is now the #2 best deal in online co-op games.
6.9
445
174
-95%
20.00€
1.00€
3. Trine 4: The Nightmare Prince
The best-selling Trine series returns to the magic of 2.5D! Join three iconic heroes as they set off on a quest through fantastical fairytale landscapes to save the world from the Nightmare Prince’s shadows. Trine 4: The Nightmare Prince is a puzzle-platformer, local co-op and online co-op game developed and published by Frozenbyte. Released on October 08th 2019 has received 13,234 reviews of which 11,811 were positive and 1,423 were negative resulting in a rating of 8.7 out of 10. Thanks to its incredible 93% discount, this game is now the #3 best deal in online co-op games.
8.7
11,811
1,423
-93%
28.14€
1.97€
4. Fury Unleashed
Shoot your way through the pages of an ever-changing comic book in this fast-paced roguelike. Play solo, in local or online co-op, expand your weaponry, and upgrade your hero with each run. All that to find out why has your creator lost his faith in you and to prove him wrong. Fury Unleashed is a replay value, rogue-like and fast-paced game developed and published by Awesome Games Studio. Released on May 08th 2020 has received 2,604 reviews of which 2,289 were positive and 315 were negative resulting in a rating of 8.4 out of 10. Currently offered at a significant 93% discount, this title has earned the #4 position in the best deals for online co-op games.
8.4
2,289
315
-93%
19.71€
1.38€
5. Borderlands 3
The original shooter-looter returns, packing bazillions of guns and a mayhem-fueled adventure! Blast through new worlds and enemies as one of four new Vault Hunters. Borderlands 3 is a rpg, looter shooter and multiplayer game developed by Gearbox Software and published by 2K. Released on March 13th 2020 has received 146,073 reviews of which 124,384 were positive and 21,689 were negative resulting in a rating of 8.4 out of 10. Currently offered at a significant 93% discount, this title has earned the #5 position in the best deals for online co-op games.
8.4
124,384
21,689
-93%
59.71€
4.18€
6. Gotham Knights
Batman is dead. It is now up to the Batman Family - Batgirl, Nightwing, Red Hood, and Robin - to protect Gotham City. Gotham Knights is a action, open world and superhero game developed by Warner Bros. Games Montréal and QLOC and published by Warner Bros. Games. Released on October 21st 2022 has received 22,529 reviews of which 15,192 were positive and 7,337 were negative resulting in a rating of 6.7 out of 10. Currently offered at a significant 93% discount, this title has earned the #6 position in the best deals for online co-op games.
6.7
15,192
7,337
-93%
56.00€
3.92€
7. From Space
From Space is a solo and co-op action-shooter for squads up to four players. Take on the challenge of liberating the earth from an alien infestation with your friends, using over-the-top weaponry in a post-apocalyptic world with awesomely stylized graphics. The apocalypse has never been so much fun! From Space is a action, co-op and online co-op game developed by Triangle Studios and published by Curve Games. Released on November 03rd 2022 has received 1,874 reviews of which 1,269 were positive and 605 were negative resulting in a rating of 6.6 out of 10. Currently offered at a significant 93% discount, this title has earned the #7 position in the best deals for online co-op games.
6.6
1,269
605
-93%
14.29€
1.00€
8. Killing Floor 2
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. Killing Floor 2 is a zombies, multiplayer and online co-op game developed and published by Tripwire Interactive. Released on November 18th 2016 has received 126,482 reviews of which 110,998 were positive and 15,484 were negative resulting in a rating of 8.7 out of 10. Currently offered at a significant 92% discount, this title has earned the #8 position in the best deals for online co-op games.
8.7
110,998
15,484
-92%
29.13€
2.33€
9. For The King
For The King is a strategic RPG that blends tabletop and roguelike elements in a challenging adventure that spans the realms. Set off on a single player experience or play cooperatively both online and locally. For The King is a rpg, online co-op and turn-based game developed by IronOak Games and published by Curve Games. Released on April 19th 2018 has received 41,158 reviews of which 36,308 were positive and 4,850 were negative resulting in a rating of 8.7 out of 10. Currently offered at a significant 92% discount, this title has earned the #9 position in the best deals for online co-op games.
8.7
36,308
4,850
-92%
20.00€
1.60€
10. Remnant Records
Remnant Records is a horror investigation game for 1 to 4 players. Explore places haunted by the dead, survive elaborate and unique ghosts and find out what happened to them through thousands of generated stories. Remnant Records is a 3d, horror and demons game developed and published by Noctiluca Studio. Released on January 23rd 2024 has received 613 reviews of which 478 were positive and 135 were negative resulting in a rating of 7.4 out of 10. Currently offered at a significant 92% discount, this title has earned the #10 position in the best deals for online co-op games.
7.4
478
135
-92%
12.50€
1.00€
Free online co-op games on Steam
Check out this fantastic list of free-to-play online co-op games you can enjoy on Steam right now, updated on April 27th 2025. Looking for even more free titles? Use the search filters to explore a wider range of free to play online co-op games.
1. Supermarket Together
The multiplayer supermarket has arrived to your neighbourhood for free! Stock your shop space, unlock perks and franchises, hire employees or chase those pesky shoplifters. The more players, the more action! Supermarket Together is a simulation, online co-op and multiplayer game developed and published by DeadDevsTellNoLies. Released on August 09th 2024 has received 64,362 reviews of which 61,131 were positive and 3,231 were negative resulting in an impressive rating of 9.3 out of 10. With 6,875 active players enjoying it for free, this strategy game has reached the #1 spot among the top free online co-op games on Steam.
9.3
61,131
3,231
6,875
players
2. Stumble Guys
Ready for the chaos? Stumble Guys is a 32-player, fast-paced multiplayer party royale where players dash, jump, and fall across hilarious obstacle courses in a fun race to be the last one standing. Stumble Guys is a free to play, battle royale and multiplayer game developed and published by Scopely. Released on October 07th 2021 has received 126,782 reviews of which 107,819 were positive and 18,963 were negative resulting in a rating of 8.4 out of 10. Thanks to its free to play tag and a daily player base of 3,525, this online co-op game has secured the #2 spot in the ranking of free online co-op games on Steam.
8.4
107,819
18,963
3,525
players
3. Goose Goose Duck
Goose Goose Duck is a game of social deduction for up to 16 players. Players are separated into different groups that are each assigned a different objective. Complete your team’s objective to win! Goose Goose Duck is a multiplayer, free to play and online co-op game developed and published by Gaggle Studios and Inc.. Released on October 03rd 2021 has received 71,763 reviews of which 62,221 were positive and 9,542 were negative resulting in a rating of 8.5 out of 10. Thanks to its free to play tag and a daily player base of 2,595, this online co-op game has secured the #3 spot in the ranking of free online co-op games on Steam.
8.5
62,221
9,542
2,595
players
4. Rec Room
Rec Room is the best place to build and play games together. Party up with friends from all around the world to chat, hang out, explore MILLIONS of player-created rooms, or build something new and amazing to share with us all. Rec Room is a free to play, vr and multiplayer game developed and published by Rec Room. Released on September 02nd 2021 has received 70,476 reviews of which 63,301 were positive and 7,175 were negative resulting in a rating of 8.8 out of 10. Attracting a solid base of 1,836 players due to its free access, this strategy game has achieved the #4 position in the best free online co-op games on Steam.
8.8
63,301
7,175
1,836
players
5. DDNet
Want to play the hardest cooperative 2D platformer ever? Want to finish no map ever? Want to be in pain for hours and cry, getting nothing in return? Come play DDNet with a large community of other sufferers! DDNet is a online co-op, free to play and multiplayer game developed and published by DDNet Team. Released on August 17th 2020 has received 36,281 reviews of which 32,506 were positive and 3,775 were negative resulting in a rating of 8.8 out of 10. Attracting a solid base of 1,478 players due to its free access, this strategy game has achieved the #5 position in the best free online co-op games on Steam.
8.8
32,506
3,775
1,478
players
6. Stay Out
Stay Out - is a MMORPG with shooter elements, based on spirit of “stalking” - an urban exploration, searching and exploring mysterious, abandoned and forgotten by humanity pieces of our planet. Stay Out is a free to play, survival and multiplayer game developed and published by MOBITECH LLC. Released on November 27th 2019 has received 25,334 reviews of which 16,483 were positive and 8,851 were negative resulting in a rating of 6.4 out of 10. Attracting a solid base of 891 players due to its free access, this strategy game has achieved the #6 position in the best free online co-op games on Steam.
6.4
16,483
8,851
891
players
7. BAPBAP
Join BAPBAP, the Roguelike Party game where no two matches are ever the same. Round up your homies, pick a character, and build a giga-unfair build that'll make them hate you - then do it all over again! BAPBAP is a early access, pvp and deckbuilding game developed and published by BAP HQ. Released on March 12th 2025 has received 1,228 reviews of which 973 were positive and 255 were negative resulting in a rating of 7.6 out of 10. Attracting a solid base of 667 players due to its free access, this strategy game has achieved the #7 position in the best free online co-op games on Steam.
7.6
973
255
667
players
8. Dungeon Defenders II
Dungeon Defenders II is a cooperative Action Tower Defense game packed with roleplaying elements like loot, leveling, and pets. Dungeon Defenders II is a multiplayer, online co-op and co-op campaign game developed and published by Chromatic Games. Released on June 20th 2017 has received 21,785 reviews of which 16,859 were positive and 4,926 were negative resulting in a rating of 7.6 out of 10. Attracting a solid base of 390 players due to its free access, this strategy game has achieved the #8 position in the best free online co-op games on Steam.
7.6
16,859
4,926
390
players
9. Sven Co-op
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. Sven Co-op is a co-op, fps and online co-op game developed and published by Sven Co-op team. Released on January 22nd 2016 has received 31,184 reviews of which 29,189 were positive and 1,995 were negative resulting in an impressive rating of 9.2 out of 10. Attracting a solid base of 283 players due to its free access, this strategy game has achieved the #9 position in the best free online co-op games on Steam.
9.2
29,189
1,995
283
players
10. PROJECT: PLAYTIME
PROJECT: PLAYTIME is a Free-to-Play multiplayer horror game where six players attempt to create one giant toy while surviving a terrifying monster that roams the toy factory. A seventh player controls the monster and is given only one goal: Find and kill everyone. PROJECT: PLAYTIME is a multiplayer, horror and survival horror game developed and published by Mob Entertainment. Released on December 12th 2022 has received 49,685 reviews of which 39,017 were positive and 10,668 were negative resulting in a rating of 7.7 out of 10. Attracting a solid base of 269 players due to its free access, this strategy game has achieved the #10 position in the best free online co-op games on Steam.
7.7
39,017
10,668
269
players