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
Call of Duty®: Modern Warfare® 2 (2009)
The most-anticipated game of the year and the sequel to the best-selling first-person action game of all time, Modern Warfare 2 continues the gripping and heart-racing action as players face off against a new threat dedicated to bringing the world to the brink of collapse.
Operation Flashpoint: Dragon Rising
Operation Flashpoint: Dragon Rising is a game about a fictitious conflict on one of the Sakhalin islands.
Resident Evil 5
This game is a port of the Games for Windows - Live version that was released in 2009. If you buy the Untold Stories Bundle here on Steam, it will be the same as upgrading to Resident Evil 5 Gold Edition.
Nation Red
Nation Red is an ultra fast infinite play arena-based shooter providing an exceptional close-quarter battlefield experience. Fight thousands of zombie mutants and their bosses in frantic bloody gameplay while earning close to 100 perks. Fight in Barricade, Survival or Free Play mode.
Sniper Elite
As World War II draws to a close, the first covert battles of the Cold War begin. Caught in the life and death struggle between Soviets and Germans in war-torn Berlin, you control the fate of a lone American OSS Sniper.
Trine Enchanted Edition
Three Heroes make their way through dangers untold in a fairytale world of great castles and strange machinery, featuring physics-based puzzles, beautiful sights and online co-op.
Killing Floor
6-player co-op survival horror at its finest! Free updates, free special events and a ridiculous amount of fun!
Warhammer 40,000: Dawn of War II - Anniversary Edition
All of Warhammer 40,000: Dawn of War II in one package. Play the award-winning real-time strategy game in all its glory, including three full campaigns, six multiplayer factions, and a full co-op Last Stand mode with eight unique heroes.
Saints Row 2
Saints Row 2 brings true freedom to open-world gaming. Players can play as who they want, how they want, and with whomever they want in this sequel to the much acclaimed and tremendously successful Saints Row.
Call of Duty: World at War
Call of Duty is back, redefining war like you've never experienced before. Building on the Call of Duty 4®: Modern Warfare engine, Call of Duty: World at War immerses players into the most gritty and chaotic WWII combat ever experienced.
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.
Sniper Elite V2
In the dark days of the end of World War Two amidst the ruins of Berlin, one bullet can change history…
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!
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 June 15th 2025.
1. ELDEN RING NIGHTREIGN
ELDEN RING NIGHTREIGN is a standalone adventure within the ELDEN RING universe, crafted to offer players a new gaming experience by reimagining the game’s core design. ELDEN RING NIGHTREIGN is a souls-like, online co-op and rogue-like game developed by FromSoftware and Inc. and published by FromSoftware, Inc. and Bandai Namco Entertainment. Released on May 29th 2025 has received 65,672 reviews of which 48,901 were positive and 16,771 were negative resulting in a rating of 7.4 out of 10. The game has hit the top spot as the #1 most played online co-op game, thanks to its 119,305 peak concurrent players over the last day.
7.4
48,901
16,771
119,305
players
2. 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 1,017,635 reviews of which 775,883 were positive and 241,752 were negative resulting in a rating of 7.6 out of 10. While seeing 59,219 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
775,883
241,752
59,219
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 797,216 reviews of which 630,223 were positive and 166,993 were negative resulting in a rating of 7.9 out of 10. While seeing 48,439 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
630,223
166,993
48,439
players
4. 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 430,252 reviews of which 330,349 were positive and 99,903 were negative resulting in a rating of 7.6 out of 10. With 46,727 concurrent players in the last 24 hours, the game currently holds the #4 spot among the most played online co-op games.
7.6
330,349
99,903
46,727
players
5. 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 multiplayer game developed and published by semiwork. Released on February 26th 2025 has received 185,642 reviews of which 179,154 were positive and 6,488 were negative resulting in an impressive rating of 9.5 out of 10. With 39,619 concurrent players in the last 24 hours, the game currently holds the #5 spot among the most played online co-op games.
9.5
179,154
6,488
39,619
players
6. 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 499,828 reviews of which 471,451 were positive and 28,377 were negative resulting in an impressive rating of 9.4 out of 10. With 18,183 concurrent players in the last 24 hours, the game currently holds the #6 spot among the most played online co-op games.
9.4
471,451
28,377
18,183
players
7. 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 768,779 reviews of which 736,611 were positive and 32,168 were negative resulting in an impressive rating of 9.5 out of 10. With 13,083 concurrent players in the last 24 hours, the game currently holds the #7 spot among the most played online co-op games.
9.5
736,611
32,168
13,083
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 78,080 reviews of which 67,486 were positive and 10,594 were negative resulting in a rating of 8.5 out of 10. With 11,807 concurrent players in the last 24 hours, the game currently holds the #8 spot among the most played online co-op games.
8.5
67,486
10,594
11,807
players
9. 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 353,960 reviews of which 344,269 were positive and 9,691 were negative resulting in an impressive rating of 9.6 out of 10. With 9,320 concurrent players in the last 24 hours, the game currently holds the #9 spot among the most played online co-op games.
9.6
344,269
9,691
9,320
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 457,632 reviews of which 435,687 were positive and 21,945 were negative resulting in an impressive rating of 9.4 out of 10. With 9,004 concurrent players in the last 24 hours, the game currently holds the #10 spot among the most played online co-op games.
9.4
435,687
21,945
9,004
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 June 15th 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 21,090 reviews of which 16,874 were positive and 4,216 were negative resulting in a rating of 7.9 out of 10. Featuring a massive 99% discount, this game currently holds the #1 spot in the best deals for online co-op category.
7.9
16,874
4,216
-99%
28.99€
0.48€
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 627 reviews of which 447 were positive and 180 were negative resulting in a rating of 6.8 out of 10. Thanks to its incredible 99% discount, this game is now the #2 best deal in online co-op games.
6.8
447
180
-99%
19.50€
0.38€
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 13,379 reviews of which 11,924 were positive and 1,455 were negative resulting in a rating of 8.7 out of 10. Thanks to its incredible 98% discount, this game is now the #3 best deal in online co-op games.
8.7
11,924
1,455
-98%
29.99€
0.62€
4. 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 126,866 reviews of which 111,325 were positive and 15,541 were negative resulting in a rating of 8.7 out of 10. Currently offered at a significant 98% discount, this title has earned the #4 position in the best deals for online co-op games.
8.7
111,325
15,541
-98%
27.99€
0.82€
5. 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 strategy game developed by IronOak Games and published by Curve Games. Released on April 19th 2018 has received 41,487 reviews of which 36,581 were positive and 4,906 were negative resulting in a rating of 8.7 out of 10. Currently offered at a significant 98% discount, this title has earned the #5 position in the best deals for online co-op games.
8.7
36,581
4,906
-98%
19.99€
0.50€
6. Main Assembly
You’re the designer, engineer and architect if you can imagine it you can create it! Construct robots of any shape or size from eight-legged spider bots to eerie UFO contraptions. Main Assembly is a 3d, online co-op and co-op game developed by Bad Yolk Games and published by Team17. Released on January 26th 2021 has received 1,314 reviews of which 1,115 were positive and 199 were negative resulting in a rating of 8.1 out of 10. Currently offered at a significant 98% discount, this title has earned the #6 position in the best deals for online co-op games.
8.1
1,115
199
-98%
19.99€
0.43€
7. Retimed
Dash and dodge bullet clusters in nerve-wracking slow motion moments and challenge your friends online or offline to awesome and fast paced battles with up to 4 players! Retimed is a multiplayer, online co-op and comedy game developed by Team Maniax and published by Stray Fawn Publishing and WhisperGames. Released on December 05th 2019 has received 352 reviews of which 294 were positive and 58 were negative resulting in a rating of 7.8 out of 10. Currently offered at a significant 98% discount, this title has earned the #7 position in the best deals for online co-op games.
7.8
294
58
-98%
14.90€
0.44€
8. Shift Happens
Shift Happens is a cooperative platformer for two. You and a friend shift your mass, throw each other and puzzle your way through four stages of stylized imaginary worlds. Including the occasional backstabbing and taunting. Play with a friend on a couch, online or even special singleplayer levels. Shift Happens is a co-op, online co-op and local co-op game developed by Klonk Games and published by Daedalic Entertainment. Released on February 22nd 2017 has received 4,053 reviews of which 3,192 were positive and 861 were negative resulting in a rating of 7.6 out of 10. Currently offered at a significant 98% discount, this title has earned the #8 position in the best deals for online co-op games.
7.6
3,192
861
-98%
14.99€
0.41€
9. 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 1,884 reviews of which 1,277 were positive and 607 were negative resulting in a rating of 6.6 out of 10. Currently offered at a significant 98% discount, this title has earned the #9 position in the best deals for online co-op games.
6.6
1,277
607
-98%
14.99€
0.31€
10. Sugar Shack
Grab some friends, fire up the boiler, and let the syrup flow! Build the world around your cabin as you fulfill orders of hungry villagers with endless sweet tooths. There's never a dull moment in this cozy forest inspired by Quebec lore and art! Sugar Shack is a online co-op, co-op and indie game developed by MadLife Divertissement and published by indie.io. Released on September 14th 2023 has received 306 reviews of which 208 were positive and 98 were negative resulting in a rating of 6.5 out of 10. Currently offered at a significant 98% discount, this title has earned the #10 position in the best deals for online co-op games.
6.5
208
98
-98%
18.49€
0.46€
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 June 15th 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 67,435 reviews of which 63,994 were positive and 3,441 were negative resulting in an impressive rating of 9.3 out of 10. With 6,046 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
63,994
3,441
6,046
players
2. Game of Thrones: Kingsroad
A story-driven action-adventure RPG, bringing the world of Westeros to life with remarkable detail and never-before seen scale. Game of Thrones: Kingsroad is a online co-op, multiplayer and choose your own adventure game developed by Netmarble Neo and published by Netmarble. Released on May 21st 2025 has received 3,607 reviews of which 2,230 were positive and 1,377 were negative resulting in a rating of 6.1 out of 10. Thanks to its free to play tag and a daily player base of 3,614, this online co-op game has secured the #2 spot in the ranking of free online co-op games on Steam.
6.1
2,230
1,377
3,614
players
3. 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 128,011 reviews of which 108,841 were positive and 19,170 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 3,386, this online co-op game has secured the #3 spot in the ranking of free online co-op games on Steam.
8.4
108,841
19,170
3,386
players
4. 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 72,691 reviews of which 63,019 were positive and 9,672 were negative resulting in a rating of 8.5 out of 10. Attracting a solid base of 2,819 players due to its free access, this strategy game has achieved the #4 position in the best free online co-op games on Steam.
8.5
63,019
9,672
2,819
players
5. 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 71,223 reviews of which 63,756 were positive and 7,467 were negative resulting in a rating of 8.8 out of 10. Attracting a solid base of 1,577 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
63,756
7,467
1,577
players
6. 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 37,450 reviews of which 33,440 were positive and 4,010 were negative resulting in a rating of 8.8 out of 10. Attracting a solid base of 1,365 players due to its free access, this strategy game has achieved the #6 position in the best free online co-op games on Steam.
8.8
33,440
4,010
1,365
players
7. 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 21,823 reviews of which 16,882 were positive and 4,941 were negative resulting in a rating of 7.6 out of 10. Attracting a solid base of 395 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
16,882
4,941
395
players
8. 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 1,856 reviews of which 1,484 were positive and 372 were negative resulting in a rating of 7.7 out of 10. Attracting a solid base of 368 players due to its free access, this strategy game has achieved the #8 position in the best free online co-op games on Steam.
7.7
1,484
372
368
players
9. 3on3 FreeStyle: Rebound
3on3 FreeStyle: Rebound allows players to work with their teammates to pull off rim-shaking slam dunks, awe-inspiring alley-oops, flashy no-look passes, and clutch outside shots which breaks the heart of the opposing team in competitive games filled with the joy and energy of street basketball. 3on3 FreeStyle: Rebound is a basketball, team-based and pvp game developed and published by Joycity. Released on July 14th 2020 has received 3,864 reviews of which 2,442 were positive and 1,422 were negative resulting in a rating of 6.2 out of 10. Attracting a solid base of 322 players due to its free access, this strategy game has achieved the #9 position in the best free online co-op games on Steam.
6.2
2,442
1,422
322
players
10. 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 31,316 reviews of which 29,316 were positive and 2,000 were negative resulting in an impressive rating of 9.2 out of 10. Attracting a solid base of 317 players due to its free access, this strategy game has achieved the #10 position in the best free online co-op games on Steam.
9.2
29,316
2,000
317
players