Best Online Co-Op Games on Steam

Unlike generic lists, our game recommendations use a rigorous analysis of Steam user reviews to identify and feature only the best, community-validated online co-op games.

Filter Games
Loading Loading...
Sins of a Solar Empire®: Rebellion Command a space-faring empire in Sins of a Solar Empire: Rebellion, the new stand-alone expansion that combines 4X depth with real-time strategy gameplay.

Price -95% 1.20€
Rating 9.1
Release 12 Jun 2012
The Lord of the Rings Online™ Join the world’s greatest fellowship of players in the award-winning online re-creation of J. R. R. Tolkien’s legendary Middle-earth.

Price Free to play
Rating 8.0
Release 06 Jun 2012
Sonic the Hedgehog 4 - Episode II The Sonic 4 Saga continues in Episode II with the return of a beloved side kick and fan-favorite villains! Following the events of Episode I, Metal Sonic has returned to form an alliance with Dr. Eggman! To face this new evil, Sonic will have to call upon an old friend to help him save the day!

Price -76% 2.40€
Rating 7.2
Release 14 May 2012
Aliens: Colonial Marines Collection 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.

Price -85% 4.69€
Rating 6.0
Release 01 May 2012
A Total War Saga: FALL OF THE SAMURAI Experience the dramatic conflict of samurai culture and modern weaponry between the Imperial throne and the last Shogunate in 19th century Japan.

Price -81% 5.99€
Rating 6.7
Release 22 Mar 2012
Realm of the Mad God Exalt Embark on an exhilarating journey into the pixelated Realm of the Mad God! Join, an action-packed, free-to-play MMO bullet hell game. Discover a world with danger, challenges, and hidden treasures as you battle through waves of enemies. Team up with players and conquer dungeons to become a legend!

Price Free to play
Rating 8.2
Release 20 Feb 2012
Serious Sam II Serious Sam II is a shot of adrenaline to the hearts of first-person shooter fans across the world. This is serious!

Price -90% 0.97€
Rating 8.7
Release 31 Jan 2012
Star Trek Online In Star Trek Online, the Star Trek universe appears for the first time on a truly massive scale. Players take the captain's chair as they command their own starship and crew. Explore strange new worlds, seek out new life and new civilizations, and boldly go where no one has gone before.

Price Free to play
Rating 7.8
Release 31 Jan 2012
Earth Defense Force: Insect Armageddon Thousands of giant insects and aliens once again ravage the earth, and only the Earth Defense Force can stop them.

Price -49% 5.17€
Rating 8.3
Release 14 Dec 2011
Serious Sam 3: BFE Serious Sam 3: BFE is a prequel to the original indie fast action FPS and Game of the Year sensation - Serious Sam: The First Encounter!

Price -97% 0.99€
Rating 8.7
Release 22 Nov 2011
Saints Row: The Third Get ready for the most out-landish gameplay scenarios ever seen as the Third Street Saints take on the Syndicate!

Price -92% 0.88€
Rating 9.4
Release 17 Nov 2011
Call of Duty®: Modern Warfare® 3 (2011) The best-selling first-person action series of all-time returns with an epic sequel to the multiple GOTY award winner Call of Duty®: Modern Warfare® 2

Price 39.99€
Rating 8.4
Release 07 Nov 2011
DC Universe™ Online DC Universe Online is a Free-to-Play, massive multiplayer online action game set in the popular DC Universe. Become one of a new breed of Heroes or Villains and wield incredible powers as you go to war with legendary characters such as Batman, Superman, Lex Luthor and The Joker.

Price Free to play
Rating 7.9
Release 02 Nov 2011
Renegade Ops Blast your way through enemy lines to defeat Inferno, a madman intent on global domination. Destruction just got awesome.

Price -63% 4.83€
Rating 8.2
Release 26 Oct 2011
The Haunted: Hells Reach Winner of 2010′s Make Something Unreal contest, The Haunted: Hells Reach is a fast-paced horror game where your goal is to liberate cursed places and survive the assault of Hell.

Price 8.99€
Rating 8.1
Release 24 Oct 2011
PAYDAY™ The Heist Take on the role of a hardened career criminal executing intense, dynamic heists in constant pursuit of the next “big score”

Price 9.49€
Rating 9.2
Release 20 Oct 2011
Dungeon Defenders Create a hero from one of four classes to save Etheria in this 4-player coop Tower Defense Action-RPG. Includes Steam exclusive Portal gun & TF2 familiars!

Price -8% 13.66€
Rating 9.1
Release 18 Oct 2011
Dead Rising 2: Off the Record You are Frank West – photojournalist and original hero of the Dead Rising Willamette incident – taking center stage experiencing the re-imagined Fortune City outbreak.

Price -98% 0.56€
Rating 7.5
Release 11 Oct 2011
RAGE Powered by id’s revolutionary id Tech® 5 technology, RAGE is an intense first-person shooter with breakneck vehicle combat, an expansive world to explore, and jaw-dropping graphics!

Price -74% 2.67€
Rating 7.6
Release 03 Oct 2011
Worms Ultimate Mayhem Load your weapons and experience a whole new dimension in destructive turn-based cartoon action!

Price -91% 1.29€
Rating 8.6
Release 28 Sep 2011
Supreme Commander: Forged Alliance The last days of man are at hand.. Two years after the Infinite War the once great warring nations now lie in ruins, and humanity’s hope for a brighter future is nothing but a bitter memory. A new, seemingly unstoppable enemy, supported by the zealots of The Order, now seeks to eradicate mankind: UEF, Aeon Loyalist, and Cybran alike.

Price -61% 3.95€
Rating 9.4
Release 28 Sep 2011
Warhammer 40,000: Space Marine - Anniversary Edition In Warhammer 40,000 Space Marine you are Captain Titus, a Space Marine of the Ultramarines chapter and a seasoned veteran of countless battles.

Price -86% 5.29€
Rating 9.0
Release 05 Sep 2011
E.Y.E: Divine Cybermancy In a dark Cyberpunk world, you (and up to 3 friends) wage war against the all-powerful Federation in this Source-powered FPS/RPG.

Price 9.75€
Rating 8.2
Release 29 Jul 2011
F.E.A.R. 3 F.E.A.R. 3 delivers all the hallmarks that define the F.E.A.R. brand: terrifying paranormal experience, frenetic combat and a dramatic storyline.

Price -95% 1.04€
Rating 7.0
Release 21 Jun 2011
Spiral Knights Join the ranks of the Spiral Knights. Stranded on an alien world, you must explore the ever-changing Clockworks beneath its surface.

Price Free to play
Rating 8.2
Release 14 Jun 2011
Champions Online Grab your cape and defend Millennium City in this comic book-style action MMORPG! Design your hero and costume from thousands of costume pieces, face super-villains like Dr. Destroyer, and create your own unique nemesis.

Price Free to play
Rating 7.0
Release 14 Jun 2011
Portal 2 - The Final Hours Portal 2 draws from the award-winning formula of innovative gameplay, story, and music that earned the original Portal over 70 industry accolades and created a cult following. For more information on Portal 2 click here.

Price 1.59€
Rating 7.2
Release 17 May 2011
Terraria Dig, fight, explore, build! Nothing is impossible in this action-packed adventure game. Four Pack also available!

Price -50% 4.97€
Rating 9.7
Release 16 May 2011
BRINK You decide the combat role you want to assume in the world of Brink as you fight to save yourself and mankind’s last refuge!

Price Free to play
Rating 6.2
Release 09 May 2011
Sanctum You think Tower Defense games are all about building? You thought wrong. Sanctum is not your average Tower Defense title. When the havoc starts, you get to join the fray! As one of the world’s first First Person Shooter - Tower Defense games, Sanctum has taken the best of both worlds to deliver an epic, one-of-a-kind experience.

Price -86% 1.41€
Rating 8.6
Release 15 Apr 2011
LEGO® Star Wars™ III - The Clone Wars™ LEGO Star Wars III: The Clone Wars will allow fans to explore endlessly and laugh their way through the Star Wars galaxy in the most humorous, accessible and action-packed LEGO game to date.

Price 19.50€
Rating 9.2
Release 22 Mar 2011
RIFT Dive into a world of epic adventure! Create your perfect hero thanks to a uniquely customizable class system. Collect, craft, and customize your gear. Go it alone or group up to challenge dungeons, raids, dynamic open-world content, and your fellow players.

Price Free to play
Rating 7.3
Release 01 Mar 2011
Magicka Magicka is a satirical action-adventure game set in a rich fantasy world based on Norse mythology. The player assumes the role of a wizard from a sacred order tasked with stopping an evil sorcerer who has thrown the world into turmoil, his foul creations besieging the forces of good.

Price -91% 0.93€
Rating 8.5
Release 25 Jan 2011
Alien Breed 3: Descent Experience the final explosive chapter in the Alien Breed series and uncover the horrifying truth surrounding the existence of the Breed. Launch discount good thru Nov. 24 10am PST.

Price -90% 0.99€
Rating 7.1
Release 17 Nov 2010
Call of Duty®: Black Ops The biggest first-person action series of all time and the follow-up to critically acclaimed Call of Duty®: Modern Warfare 2 returns with Call of Duty®: Black Ops.

Price 39.99€
Rating 8.9
Release 08 Nov 2010
Lost Planet® 2 Lost Planet 2, the sequel to Lost Planet™: Extreme Condition, the landmark third-person shooter that sold over 2.3 million units worldwide, is now available on Steam!

Price 272.52€
Rating 6.5
Release 15 Oct 2010

Most played online co-op games


78,252 players

630,223
166,993
Rating 7.9

38,627 players

330,349
99,903
Rating 7.6

37,942 players

179,154
6,488
Rating 9.5

22,980 players

860,233
285,804
Rating 7.5

20,994 players

471,451
28,377
Rating 9.4

13,863 players

41,627
6,002
Rating 8.6

13,252 players

311,754
17,411
Rating 9.4

12,079 players

93,330
9,199
Rating 9.0

11,632 players

48,901
16,771
Rating 7.4

10,931 players

643,681
57,104
Rating 9.1