3,486 Action games your group can play together online, including ATOMEGA, DoDonPachi Resurrection, and Polyball.
All games: 24
The fast-paced first-person multiplayer arena shooter with an evolution twist. Collect mass as you race around the map to take on increasingly powerful new forms – from the glowing Atom to the majestic Omega. Battle for supremacy with up to seven other players as you compete to dominate the arena.
The legendary bullet-hell shoot-’em-up series has come to Steam! DoDonPachi is ressurected after a Blissful Death with enough modes to satisfy the beginner and the expert player alike. Tonight we dine in bullet hell!
Get ready to enter a new era of physics platforming. Polyball is a classic ball rolling game in the vein of Super Monkey Ball, Marble Madness, and Marble Blast - while taking cues from games such as the Sonic series, Trackmania, and Mario Kart.
Slayers! Go forth and eradicate the Oni menace! Experience the latest hunting action game featuring a dynamic targeted destruction system! The latest installment in the hunting action series "Toukiden".
Subsistence is a sandbox, first person, solo or co-op, PvE open-world survival game. Struggle through changing seasons to build a base, develop technology and gear-up in the hostile environment. Defend yourself from wildlife, the elements and AI hunters (who also build bases in the world).
FIRST STRIKE is a fast paced real time strategy game where you play one of the twelve biggest nuclear superpowers of the world – from known superpowers like the USA to an upstart hellraiser like North Korea – and try to be the last one remaining when the whole world blows to smithereens.
UNO™ is the iconic card game reimagined with a large variety of gameplay and customization options. Play solo or with friends, personalize your experience from rules to cosmetics, and try the Happy Hour!
Play as an exiled 'wum' looking for a new home in this bizarre but charming world, filled with strange creatures, puzzles, monsters and political chaos.
The fastest and most iconic bikes in the world's biggest digital garage!
RAID: World War II is an action-packed four player cooperative shooter set during a time when the Nazi war machine was still winning, and hope was in short supply.
Art of War: Red Tides is a fair multiplayer strategy game that allows different teams on the same platform (e.g. smartphones, PC, etc.) to battle against each other. You will encounter players around the world!
Welcome to the zombie apocalypse experience of a lifetime – and now more beautiful than ever. Caught in the midst of an epic zombie outbreak on the tropical island of Banoi, your only thought is: Survive!
Ultimate Chicken Horse is a party platformer game where you build the level as you play, placing traps and hazards to screw your friends over, but trying not to screw yourself.
8Bit Fiesta brings everything you need to the table with its action packed local multiplayer mayhem including a built in drinking game! Choose between a ton of characters and challenge your friends and prove yourself worthy the title "King of the Fiesta".
Explore a haunting, punishing island in this stylized 2D action RPG. Salt and Sanctuary combines fast and brutal 2D combat with richly developed RPG mechanics in a cursed realm of forgotten cities, blood-soaked dungeons, and desecrated monuments.
An old-fashioned beat 'em up with big doses of adrenaline and trippiness, somewhere between the classic style of Streets of Rage and the ultra-violence of Hotline Miami. Set in a cold, ruthless Soviet Union, Mother Russia Bleeds aims to conjure up anxiety, unease, and drug-addled frenzy.
POSTAL Redux is a high definition remake of the classic dark and surreal twin-stick isometric shooter. Take control of The POSTAL Dude as he fights to survive in a world gone mad with violence.
Therian Saga is a MMORPG that tries to stand out of the crowd by offering a compelling storytelling surrounded by a massive mathematical set of rules that define the world your hero will evolve in. It could be said that it borrows elements from old-time MUD games, strategy games and even tabletops RPG.
Ratty Catty is a Multiplayer / CO-OP hide & seek game about the adventures of a domestic cat Catty and hazel dormouse Ratty, who eats the foods in the house, feeds its babies, and lives in a small rat nest.
FRAG LIKE IT'S 1999! TOXIKK plays as if today's military shooters never existed: Designed as a spiritual successor to the FPS giants of the late 90s and early 2ks, TOXIKK carefully evolves their mechanics with modern technology and fresh ideas elaborated with Arena-FPS enthusiasts.
PAC-MAN 256 is the maze that never ends. But the Glitch is coming for you…
Craft unique strategies and outmaneuver your foes in TINY METAL, a turn-based Japanese wargame! With new tactical options, you will command over 16 tactically diverse units, flank, assault, deploy heroes from orbital dropships, and focus the firepower of multiple units to even out otherwise disastrous odds.
Fight through connected Half-Life campaigns and a wide range of community maps with friends online or over LAN. Revive teammates, solve map-built puzzles, and keep your group moving together.
Just Cause 3 Multiplayer mod is a free fan-created project bringing an explosive and highly-customizable multiplayer.