1,237 Online Co-Op Action games your group can play together online, including HELLDIVERS™ Dive Harder Edition, RWBY: Grimm Eclipse, and Dead Island: Riptide Definitive Edition.
All games: 24
HELLDIVERS™ is a hardcore, cooperative, twin stick shooter. As part of the elite unit called the HELLDIVERS, players must work together to protect SUPER EARTH and defeat the enemies of mankind in an intense intergalactic war.
RWBY: GRIMM ECLIPSE is a 4 player, online co-op, hack and slash game based upon Rooster Teeth’s international hit series RWBY.
Welcome to the zombie apocalypse experience of a lifetime – more beautiful than ever. Caught in an epic zombie outbreak on the tropical island of Banoi, your only thought is: Survive!
Move or Die is an absurdly fast-paced 4-player local and online party game where the mechanics change every 20 seconds! It's THE friendship-ruining game.
Tanki Online is the free-to-play MMO-shooter with real-time PvP-battles. Throw yourself into furious tank battles shoulder to shoulder with other living players and master your skills – destroy enemy tanks, customize your futuristic armored vehicle and compete with tankers from all over the world.
A tactical open world third-person shooter set in New York after a deadly pandemic. Team up or go solo to restore order against deadly factions, secure loot, and conquer high-risk endgame challenges.
Barony is the premier first-person roguelike with cooperative play! Adventure alone, or gather a party with iconic and unusual RPG classes to face off against the brutal dungeons. Test your resourcefulness, wits, and friendships, on your quest to lift the evil lich's curse!
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.
Wage war across entire solar systems with massive armies at your command. Annihilate enemy forces with world-shattering TITAN-class units, and demolish planets with massive super weapons!
Up to four players fight through Skaven-overrun Ubersreik in a co-op campaign shaped by distinct heroes, shared danger, and loot dice.
Experience the Next Generation of the #1 Fighting Franchise. Mortal Kombat X combines unparalleled, cinematic presentation with all new gameplay.
Rampage Knights is a cooperative beat 'em up game mixed up with randomized dungeon crawling and exploration, which you can play alone or with a friend online.
The Pang series is a beloved collection of arcade video games from the early 90s. Guide two brothers on a quest around the world to save humankind from a massive alien invasion!
Teeworlds is a free online multiplayer game, available for all major operating systems. Battle with up to 16 players in a variety of game modes, including Team Deathmatch and Capture The Flag. You can even design your own maps!
Victor Vran is the isometric action-RPG where your skill is just as essential as your character build and gear. Experience intense combat action: dodge, jump and unleash powerful skills to finish off your enemies!
RUNNING WITH RIFLES is a top-down tactical shooter with open world RPG elements. In RWR, you join the ranks of an army as a common soldier, just like the thousands around you.
Hunt humans, slay dinosaurs. Choose your side in chaotic prehistoric PvP... newly updated with more dinosaurs, more weaponry, new game mechanics, expanded lore and more! Think fast, or you're extinct.
Five-star tower defense with unrivaled depth and replayability. The Bloons are back in full HD glory and this time they mean business! Build awesome towers, choose your favorite upgrades, hire new Special Agents, and pop every last invading Bloon in the most popular tower defense series in history.
The world’s most irreverent co-op action adventure returns! In the next chapter of Magicka, players ascend from the ruins of Aldrheim to experience a Midgård almost wiped free of Wizards after the Wizard Wars, with the few that do remain having either gone mad or extremely hostile toward all others
RE Revelations 2 continues the series acclaimed essential survival horror experience, while uncovering startling truths.
The Caped Crusader joins forces with the super heroes of the DC Comics universe and blasts off to outer space to stop the evil Brainiac from destroying Earth.
Play as a shark or a diver in a dark aquatic world and overcome your enemies by employing cunning, teamwork, and stealth. Depth blends tension and visceral action as you team up against AI or be matched with other players in heart pounding combat.
LEGO® Pirates of the Caribbean: The Video Game is an action adventure game that brings the Pirates of the Caribbean world and all its colorful characters to life in LEGO Brick form. Players experience all the memorable scenes from all four films in the humorous and quirky LEGO Video Games style.
Play a two-person story or four-player Arena in BattleBlock Theater, online or locally.