Best Online Co-Op Steam Games on Sale

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.

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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 -80% 2.01€
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 -84% 4.86€
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
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 -54% 4.68€
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 -96% 1.20€
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% 0.89€
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 -50% 19.99€
Rating 8.4
Release 07 Nov 2011
Renegade Ops Blast your way through enemy lines to defeat Inferno, a madman intent on global domination. Destruction just got awesome.

Price -80% 2.71€
Rating 8.2
Release 26 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 -46% 8.12€
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% 0.55€
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 -94% 0.85€
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 -80% 1.99€
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% 5.39€
Rating 9.0
Release 05 Sep 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
Terraria Dig, fight, explore, build! Nothing is impossible in this action-packed adventure game. Four Pack also available!

Price -50% 4.96€
Rating 9.7
Release 16 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 -94% 0.68€
Rating 8.6
Release 15 Apr 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 -92% 0.87€
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 -91% 0.95€
Rating 7.1
Release 17 Nov 2010
Lara Croft and the Guardian of Light Take control of Lara and her new partner Totec, a Mayan tribesman, and uncover the ancient artifact known as the "Mirror of Smoke" in this all new action adventure game.

Price -93% 0.74€
Rating 8.8
Release 28 Sep 2010
Alien Breed 2: Assault Can you survive the alien onslaught? Gamers across the world will now have a chance to play the next chapter in this high-budget, high-quality series.

Price -91% 0.95€
Rating 6.7
Release 22 Sep 2010
Worms Reloaded Ten years on from Worms™ Armageddon and the turn-based comic mayhem continues in Worms™ Reloaded, an all-new edition available for PC through Steam.

Price -97% 0.74€
Rating 8.4
Release 26 Aug 2010
Serious Sam HD: The Second Encounter Serious Sam HD: The Second Encounter is a visually upgraded and fully Steam supported remake of the original high-adrenaline single-play and 16-player co-operative arcade-action FPS and Gamespot's Game of the Month!

Price -86% 2.98€
Rating 8.6
Release 28 Apr 2010
Sonic & SEGA All-Stars Racing SONIC AND SEGA ALL-STARS RACE FOR VICTORY IN A HIGH SPEED HIGH SKILL RACETRACK SHOWDOWN! TAKE TO THE TRACK BY CAR, MONSTER TRUCK, BIKE AND EVEN AEROPLANE IN SONIC & SEGA ALL-STARS RACING. Explore stunning new circuits including Sonic Seaside Hill, Curien Mansion and Blizzard Castle as you zip around medieval castle ramparts, hurtle...

Price -55% 4.57€
Rating 8.4
Release 03 Mar 2010
Aliens vs. Predator™ Survive, hunt and prey in the deadly jungles and swamps in distinctly new and thrilling first person gameplay.

Price -62% 5.79€
Rating 8.9
Release 16 Feb 2010
Serious Sam HD: The First Encounter 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!

Price -85% 2.27€
Rating 9.1
Release 24 Nov 2009
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.

Price -25% 14.99€
Rating 9.2
Release 11 Nov 2009
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.

Price -80% 0.58€
Rating 8.5
Release 03 Sep 2009
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.

Price -95% 0.42€
Rating 7.4
Release 16 Jul 2009
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.

Price -93% 1.15€
Rating 9.3
Release 02 Jul 2009
Killing Floor 6-player co-op survival horror at its finest! Free updates, free special events and a ridiculous amount of fun!

Price -96% 0.94€
Rating 9.3
Release 14 May 2009
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.

Price -95% 0.56€
Rating 7.4
Release 07 Jan 2009
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.

Price -25% 14.99€
Rating 9.1
Release 18 Nov 2008
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.

Price -75% 2.49€
Rating 7.6
Release 09 Apr 2008
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...

Price -82% 3.35€
Rating 8.7
Release 24 Sep 2007
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...

Price -25% 14.99€
Rating 9.1
Release 13 Oct 2006

Most played online co-op games


52,787 players

179,154
6,488
Rating 9.5

48,279 players

630,223
166,993
Rating 7.9

43,379 players

35,638
5,110
Rating 8.6

42,554 players

330,349
99,903
Rating 7.6

26,931 players

775,883
241,752
Rating 7.6

17,286 players

736,611
32,168
Rating 9.5

16,656 players

471,451
28,377
Rating 9.4

16,092 players

26,968
991
Rating 9.4

13,167 players

5,970
751
Rating 8.6

12,500 players

67,486
10,594
Rating 8.5