Steam Co-Op Games in Common

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Controls minions with your best (evil) friend as you terrorize the country side.Overlord is set in an unnamed fantasy world, where the player takes the role of a resurrected warrior known simply as The Overlord who has control over hordes of gremlin-like creatures known as "minions". The player must defeat seven corrupt ruling heroes in order to reconquer the lands and establish his lordship over its inhabitants. The game features a corruption feature, similar to that of the Fable games, but allowing the player to "be evil... or really evil", where certain actions and choices affect different aspects of the story and gameplay. While controlling the Overlord in a third person perspective, the way minions are controlled to battle and perform actions brings elements of real time strategy, with upgrades bringing those of role-playing games. The game also uses black humour and often parodies and satires the traditional fantasy setting and plot.

Left 4 Dead 2

Take the role of a different set of survivors as you use all new blunt force weapons, chainsaws and new guns in the sequel to Left 4 Dead. Teamwork is even more crucial as high intensity moments require greater communication to survive.To enable split screen refer to this post.

Titan Quest

Up to six players can team up online or via LAN to battle their way through the campaign

Spec Ops: The Line

A series of objective-based cooperative multiplayer scenarios set in Dubai after a series of cataclysmic sandstorms have wrecked the city. It includes four fast-paced missions, each with its own unique objectives, environments and playable characters.

Portal 2

Portal 2 will have a co-op campaign. Players take control of a robot and work through puzzles that require two players to work together to solve.


Four player co-op is available in all game modes and types including a story mode and an unlockable survival mode. While you can't drop in to a game, you can drop out and not break the session if you aren't the host.


Terraria is a world building open ended side scrolling action game. Think of it like Minecraft in 2D.

F.E.A.R. 3

Players can take the role of point man, the main character from previous FEAR titles or Fettel, a pscho-kintetic character that can inhabit the bodies of enemies in two player online co-op.In addition the game features two survival style online co-op modes for four players.

Civilization V

Research is shared between players when choosing to play on the same team. If both players research the same item, the time it takes is reduced. When one player discovered a technology, the other gets it as well.Players share the benefits of landmarks, ruins, and other discoveries on the map.Players share the map. Diplomatic options are available as well to trade resources, gold, and units.Co-Op is played in multiplayer with each player picking to join the same "team." It's assumed a balance of 3 players vs 3 AI are chosen, but you can weight it to 3vs1vs1vs1 or 3vs2 or 2vs1, etc.

Iron Brigade

Team up with three other players and show off your customized Trenched Mech as you work together. The game also features a revive mechanic and will scale difficulty based on the number of players.

Serious Sam 3: BFE

Team up through the campaign with up to 15 other friends for frantic, old school, shooting action.


Three players can team up locally or online and play against bots.

Borderlands 2

Players work together using four different classes of characters to complete quests, gather loot, and trade items. All three systems support online co-op. Local co-op is available on the console versions.

Company of Heroes: Tales of Valor

Operation Stonewall is the lone co-op mode in Tales of Valor. It throws up to four players into a scenario where they defend a town against an all out attack by an overwhelming AI opponent. You'll have to use everything at your disposal to try and hold out.

Monaco: What's Yours is Mine

Team up with up to four people on the same screen or online to steal everything that isn't nailed down

Trine 2

A side-scrolling puzzle-platforming game featuring up to three players working together to complete the campaign.

Path of Exile

Form a party of up to 6 players online to adventure through randomly generated areas. Players can join the party at any time and port into a private area that their party has already created. Choose from six classes in this highly character-customizable ARPG.

Company of Heroes 2

The game's Theater of War mode allows players to team up across 18 missions that can be played cooperatively.


Two players team up in a survival mode or last stand mode. In survival one of you mans the ballista, whilst the other acts as a hero. Last stand mode sees both of you in acting the hero against endless waves of enemies.

Edge of Space

Explore, craft and create with a team of friends in this Terraria-like sci-fi game.


Mercenary Kings

Four players can shoot, stab, loot, and craft their way to victory in local split screen co-op or online co-op.


Solo or cooperate in this adventure from bottom to top of Castle Hammerwatch. Kill hordes of enemies with varied looks and features through four unique enviroments with traps, hidden secrets and puzzles.

Risk of Rain

Team up with 4 friends to fight your way off an alien planet with up to 10 playable characters, randomized levels, and a difficulty level that increases the longer you play


Up to 4 players take perform multiple bank heists and robberies spanning over 30 missions. Gameplay is heavily improved and expanded since it's prequel, with a number of new abilities and items.


FORCED is centered on a number of unique and interesting challenges geared towards the number of players present. Additionally, a cooperative combat system is implemented where players can place ‘marks’ on enemies with special attacks, and thus increase the potency of other players' attacks against the foes.

Painkiller Hell & Damnation

Play through the campaign with a friend in co-op either online or locally.


Rescue survivors with a team of friends from a zombie outbreak.


Join up with friends to create and build in this open-ended game of creation and exploration.

Dungeon of the Endless

A four player roguelike with tower defense elements. Explore your way through randomly generated rooms and mount defenses against hostile aliens in a pixelated top-down action RPG.

Hero Siege

Players team up in as one of 7 classes like the Viking, Pyromancer, Pirate, and More! Character progression is persistent and saved to the player.


Get four players together to prove how much you hate terrorism. Prove it with guns!


Team up with friends and work to capture and defend checkpoints against enemy AI across numerous maps. One player acts as a squad leader giving orders.

BattleBlock Theater

BattleBlock Theater features a co-op campaign for two online or local players. Four local players can play nine different Arena modes against bots.


Story co-op and co-op challenge rooms for two online players.

LEGO Worlds

Two players, either locally or online, can create their own worlds out of LEGO bricks

Killing Floor 2

The game is designed for co-op, as the horde can easily overrun a single player. A multitude of varied playable characters await for players to choose from as they enter the fray in online co-op mode


Team up with your friends to form a murderous crew and choose from a wide variety of deadly Gladiators, each with their own unique abilities and play style. Work together to shoot, smash, stomp, electrocute, drain, and melt your enemies. Or support your fellow Gladiators through healing and buffing up their skills!