Portal 2
The "Perpetual Testing Initiative" has been expanded to allow you to design co-op puzzles for you and your friends!
98% positive of 392,510 reviewsPlaying now: 2,451$9.99
Action · Physics games to play together
414 Action · Physics games your group can play together online, including Portal 2, Rock of Ages, and Amnesia: The Dark Descent.
All games: 24
Rock of Ages
A rock-solid combination of rock-rolling action, deep strategy, and captivating art and music from different ages of history, this is a game of crush or be crushed!
91% positive of 3,384 reviewsPlaying now: 9$9.99
Amnesia: The Dark Descent
Amnesia: The Dark Descent, a first person survival horror. A game about immersion, discovery and living through a nightmare. An experience that will chill you to the core.
95% positive of 20,528 reviewsPlaying now: 147$3.99
Crash Time 2
Crash Time 2 is an open-world arcade racing game where you play as an Autobahn police officer, engaging in high-speed chases, escort missions, and criminal investigations across a large free-roaming map.
63% positive of 1,173 reviewsPlaying now: 4$4.99
Garry's Mod Co-op: An Open-Ended Physics Sandbox
Garry's Mod has no built-in co-op campaign, but its online Sandbox gives you and your friends physics tools, props, and a huge community workshop to turn an empty map into your own project.
96% positive of 1,099,375 reviewsPlaying now: 31,401$9.99
FlatOut 2
Experience the drive of your life as you throw yourself around on and off the track causing fences to shatter, tyre walls explode, water tanks and barrels fly across the track into other cars.
95% positive of 19,625 reviewsPlaying now: 396$1.99
Half-Life 2
Reawakened from stasis in the occupied metropolis of City 17, Gordon Freeman is joined by Alyx Vance as he leads a desperate human resistance. Experience the landmark first-person shooter packed with immersive world-building, boundary-pushing physics, and exhilarating combat.
97% positive of 204,574 reviewsPlaying now: 2,210$9.99
Gish
Gish isn't your average hero. In fact, he's not your average anything...you see, Gish is a ball of tar. A Sunday stroll with his lady friend, Brea, goes awry when a shadowy figure emerges from an open manhole and pulls Brea below ground.
60% positive of 310 reviewsPlaying now: 1$9.99
Party Animals
Fight your friends as puppies, kittens and other fuzzy creatures in PARTY ANIMALS! Paw it out with your friends remotely, or huddle together for chaotic fun on the same screen. Interact with the world under our realistic physics engine. Did I mention PUPPIES?
79% positive of 58,416 reviewsPlaying now: 0$0
TerraTech
TerraTech is an open-world, sandbox adventure game, where you design and build your own creations through a mix of crafting, combat and discovery. Design vehicles from a huge library of blocks. Scavenge, craft and buy new parts to survive and become the ultimate planetary prospector.
91% positive of 20,658 reviewsPlaying now: 0$24.99
Descenders
Descenders is extreme downhill freeriding for the modern era, with procedurally generated worlds, and where mistakes have real consequences. Will you lead your team to glory and become the next legendary Descender?
95% positive of 20,169 reviewsPlaying now: 0$24.99
Dome Keeper
Defend against waves of alien monsters in this unique roguelike action miner. Dig for resources, collect useful gadgets, and upgrade equipment to increase odds of survival – just hurry back before your dome is destroyed!
92% positive of 19,291 reviewsPlaying now: 0$17.99
Clownfield 2042
Clownfield 2042 is an FPS where you take the role of a no-clown, equipped with arsenal to fight anyone ahead and win the front. After the 2022 crypto-crash caused by NFT's, the majority of nations collapsed and a union of "No-Clowns" was formed. You are one of them, arm up and get ready for war.
84% positive of 3,959 reviewsPlaying now: 0$0.99
Chaos
Chaos is an online FPS game. Why should you play it? Destruction, lots of it, plus some explosions, oh yeah, guns! Who doesn't like guns and explosions?
88% positive of 3,775 reviewsPlaying now: 0Free
Wanba Warriors
Have you got what it takes to be a Wanba Warrior? Step into the absurd world of calligraphy combat and prepare to lay the smackdown upon all who dare to oppose you, dishing out damage with your chosen ink brush of brutality! highly recommend playing with controllers.
89% positive of 2,347 reviewsPlaying now: 0$4.99
Gridiron
Gridiron is a fast-paced fusion of sci-fi and arcade-style football featuring easy to understand controls and a competitive multiplayer driven online experience. Gridiron supports up to 7v7 action in both casual and competitive online matches, offline practice mode and much more!
77% positive of 1,999 reviewsPlaying now: 0
DRIFT CE
Tune your dream drift car, change parts, boost performance and challenge other players on Japan's legendary EBISU circuits!
72% positive of 1,832 reviewsPlaying now: 0$29.99
Mushy
Mushy is a round based first person shooter. The attackers plant a bomb and the defenders defuse it; all while engaging in armed combat!
85% positive of 1,671 reviewsPlaying now: 0Free
Parking Garage Rally Circuit
Retro Arcade Rally Racing... in Parking Garages?!? Precision driving with tight simple controls and arcade physics, all in a Sega Saturn style presentation
96% positive of 1,628 reviewsPlaying now: 0$9.99
pla_toon
pla_toon is an action-packed, first-and-third-person, multiplayer, light-hearted, cartoon-style shooter where you as play a soldier. Join the multiplayer battle and be the first to a para-crate drop to equip your player with powerful weapons! Or get on an ostrich and ride off into the sunset...
88% positive of 1,468 reviewsPlaying now: 0Free
Topple Tactics
Topple Tactics is a physics-based multiplayer tower defense game where one huge player controls the map by placing towers and using abilities, whilst the little players level up their stats and equipment to reach the end of the map and defeat the huge player!
88% positive of 1,377 reviewsPlaying now: 0$9.99
Dark Roll: Free Kick Challenge
A ball rolling game, where you take football free kicks. Single player challenges, Steam Leaderboards and ranked multiplayer. Free to play.
80% positive of 1,224 reviewsPlaying now: 0Free
Vox Machinae
Strap yourself into the cockpit of a robot seven times taller than a Tyrannosaurus Rex and prepare to do battle in Vox Machinae: the ultimate giant robot combat action-simulator for both VR and standard screens.
86% positive of 1,183 reviewsPlaying now: 0$29.99
Mad Adventures
Work together or betray each other! Unlock lobby-wide upgrades. Survive a 4-day expedition to reach the final boss. A Multiplayer 3D Platformer with a sprinkle of Roguelike and Battle Royale!
91% positive of 1,105 reviewsPlaying now: 0Free