17 Co-op · Mod games your group can play together online, including Rivals of Aether II, Battle Grounds III, and Teardown.
All games: 17
Rivals of Aether II is the sequel to the hit indie fighting game, Rivals of Aether. Play as both new and returning elemental fighters in the next generation of platform fighters.
After 6 years of development, Battle Grounds III (BG3) is the next iteration in the classic franchise which began 17 years ago. Prepare for battle in the American War of Independence!
Prepare the perfect heist in a fully destructible, simulated voxel world. Tear down walls with vehicles or use explosives to create your own shortcuts. Shape the environment to your advantage in the most creative ways you can imagine. Play solo or with up to 12 players in multiplayer.
Step onto the gridiron with Football Simulator and experience the most dynamic and physics-driven football game ever made. Break through tackles, juggle tipped passes, and dive for interceptions to lead your team to victory. Features a fully moddable environment.
The world of mega-hit manga and anime BLEACH comes to Steam in this exciting 3D action game! Build a team using your favorite characters from the BLEACH universe!
Coordinate firefighters, police, medical personnel and specialists in the classic EMERGENCY 4 Deluxe! Now with the previously untranslated bonus missions in English.
Experience the job of a bus driver in a vast and freely drivable urban area. Drive original licensed city buses from the great brands: Mercedes-Benz, Setra, MAN, and IVECO BUS. Transport your passengers safely and punctually, either solo in single player mode, or in multiplayer mode.
MudRunner is the ultimate off-road experience putting the players in the driver seat and dares them to take charge of incredible all-terrain vehicles, venturing across extreme Siberian landscapes with only a map and compass as guides!
{{An RTS inspired by the classics of the past!}} Making up for it's subpar retro graphics with fun gameplay and modern multi-threaded tech enabling huge battles to run smooth... Featuring singleplayer challenges, skirmish, sandbox, 10-player multiplayer & workshop modding.
Coordinate your team of first responders in the anniversary edition of EMERGENCY! Featuring 10 remastered classic EMERGENCY missions and three full campaigns, EMERGENCY 20 is the complete package for both experienced and new rescue commanders!
Codename CURE is a first person, co-operative zombie game with support for up to five players, providing dynamic, fast-paced zombie fragging with both objective, and survival-based missions.
Just Cause 3 Multiplayer mod is a free fan-created project bringing an explosive and highly-customizable multiplayer.
In Construction Simulator 2015, you take the controls of 16 realistic construction machines made by LIEBHERR, STILL and MAN with high-quality 3D graphics.
Multiplayer based, first person enabled, action packed and skill demanding shooter set in the Wild West times. A unique combination of non stop action and slow but powerful weaponry.
Command or corrupt an entire galaxy in the definitive Star Wars strategy collection. It is a time of galactic civil war. Will you take up the reins of the Rebellion, assume control of the Empire, or rule the Star Wars Underworld?
Team up as survivors, scavenge weapons, and barricade rooms while player-controlled zombies close in. Zombie Panic! Source is online PvP with cooperative play inside each team.
One of the most popular online action games of all time, Team Fortress Classic features over nine character classes -- from Medic to Spy to Demolition Man -- enlisted in a unique style of online team warfare. Each character class possesses unique weapons, items, and abilities, as teams compete online in a variety of game play modes.