Total Nerd The 20+ Best PC Online Co Op Games on Steam  

Ranker Games
32 votes 3 voters 30 items

Looking for good PC online co op games on Steam? Look no further, as we're ranking the best Steam online co op games that you'll definitely find worth your time. The Steam Store can be frustrating to browse, as they often are too gratuitous with their tagging system. To ensure that you find exactly what you're looking for, browse this list of the best online co op PC games on Steam.

In cooperative gameplay or a co op game, it's all about teamwork. In the 2D co op game Terraria, players explore, build, and engage in combat, all within a sandbox. Rec Room is categorized as a virtual social club where you play active games, like paintball or charades, with friends both local and from afar. Cooperative gameplay for the co op game Rec Room takes on the form of cooperative adventures.

Vote up the online co op games on Steam that you would recommend to other gamers, and downvote anything you played but didn't enjoy.

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Rocket League is listed (or ranked) 1 on the list The 20+ Best PC Online Co Op Games on Steam
Rocket League

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Terraria is listed (or ranked) 2 on the list The 20+ Best PC Online Co Op Games on Steam
Terraria 2011

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Castle Crashers is listed (or ranked) 3 on the list The 20+ Best PC Online Co Op Games on Steam

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Trine 2: The Complete Story is listed (or ranked) 4 on the list The 20+ Best PC Online Co Op Games on Steam
Trine 2: The Complete Story

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Trine Enchanted Edition is listed (or ranked) 5 on the list The 20+ Best PC Online Co Op Games on Steam
Trine Enchanted Edition

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Torchlight II is listed (or ranked) 6 on the list The 20+ Best PC Online Co Op Games on Steam
Torchlight II

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Blood And Bacon is listed (or ranked) 7 on the list The 20+ Best PC Online Co Op Games on Steam
Blood And Bacon

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EARTH DEFENSE FORCE 4.1 The Sh... is listed (or ranked) 8 on the list The 20+ Best PC Online Co Op Games on Steam
EARTH DEFENSE FORCE 4.1 The Shadow of New Despair

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Shift Happens is listed (or ranked) 9 on the list The 20+ Best PC Online Co Op Games on Steam
Shift Happens

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Borderlands is listed (or ranked) 10 on the list The 20+ Best PC Online Co Op Games on Steam
Borderlands

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Secrets Of Grindea is listed (or ranked) 11 on the list The 20+ Best PC Online Co Op Games on Steam
Secrets Of Grindea

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Ibb & Obb is listed (or ranked) 12 on the list The 20+ Best PC Online Co Op Games on Steam
Ibb & Obb

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Alien Swarm is listed (or ranked) 13 on the list The 20+ Best PC Online Co Op Games on Steam
Alien Swarm

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Magicka is listed (or ranked) 14 on the list The 20+ Best PC Online Co Op Games on Steam
Magicka

The 30+ Best PC Co-Op Games On Steam

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Killing Floor is listed (or ranked) 15 on the list The 20+ Best PC Online Co Op Games on Steam
Killing Floor

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Don't Starve Together is listed (or ranked) 16 on the list The 20+ Best PC Online Co Op Games on Steam
Don't Starve Together

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Rec Room is listed (or ranked) 17 on the list The 20+ Best PC Online Co Op Games on Steam
Rec Room

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Garry's Mod is listed (or ranked) 18 on the list The 20+ Best PC Online Co Op Games on Steam

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Left 4 Dead is listed (or ranked) 19 on the list The 20+ Best PC Online Co Op Games on Steam

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Supreme Commander: Forged Alli... is listed (or ranked) 20 on the list The 20+ Best PC Online Co Op Games on Steam

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The Orange Box is listed (or ranked) 21 on the list The 20+ Best PC Online Co Op Games on Steam

The Greatest RPG Video Games Ever Made

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Left 4 Dead 2 is listed (or ranked) 22 on the list The 20+ Best PC Online Co Op Games on Steam

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BattleBlock Theater is listed (or ranked) 23 on the list The 20+ Best PC Online Co Op Games on Steam

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Portal 2 is listed (or ranked) 24 on the list The 20+ Best PC Online Co Op Games on Steam
Portal 2 2011

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Saints Row: The Third is listed (or ranked) 25 on the list The 20+ Best PC Online Co Op Games on Steam

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Borderlands 2 is listed (or ranked) 26 on the list The 20+ Best PC Online Co Op Games on Steam

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Total War: Shogun 2: Fall of t... is listed (or ranked) 27 on the list The 20+ Best PC Online Co Op Games on Steam

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Orcs Must Die! 2 is listed (or ranked) 28 on the list The 20+ Best PC Online Co Op Games on Steam
Orcs Must Die! 2 2012

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Sonic & All-Stars Racing Trans... is listed (or ranked) 29 on the list The 20+ Best PC Online Co Op Games on Steam

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Sanctum 2 is listed (or ranked) 30 on the list The 20+ Best PC Online Co Op Games on Steam
Sanctum 2