可以和朋友在线一起玩的免费开玩（Action）游戏共 658 款，包括Maurice: In The Predator's Nest、Stumble Guys和Bloons TD Battles 2。
全部游戏: 24
Plunge into "Maurice: Predator's Nest". A survival game where you're either a cunning survivor or a fearsome predator in a dark, treacherous world. Outwit or hunt in this thrilling battle for survival.
Ready for the chaos? Stumble Guys is a 32-player, fast-paced multiplayer party royale where players dash, jump, and fall across hilarious obstacle courses in a fun race to be the last one standing.
From the creators of Bloons TD6... Bloons TD Battles 2 is a brand new installment of the top-rated head-to-head tower defense game. Gather your Hero, choose your team of powerful Monkey Towers, and prepare to battle one on one against other players and relentless waves of Bloons!
Welcome to the coziest way to kill your friends. Super Animal Royale is a 64-player, top-down 2D battle royale where adorably murderous animals fight tooth, claw, and machine gun. Then, relax in Super Animal World with fishing, hamsterball races, and story quests before the next fight to the death.
STUG is a free multiplayer physics based tank combat game where every shot counts. Angle your armor to bounce incoming fire, and ricochet shots off walls to hit enemies in their weak points.
Embark on an odyssey for the Lost Ark in a vast, vibrant world: explore new lands, seek out lost treasures, and test yourself in thrilling action combat in this action-packed free-to-play RPG.
Direct your battleship to glorious victory! Online battle under your leadership!
Get ready for intense, skill-based FPS action with AQtion! Featuring the best of Action Quake 2, enjoy fast-paced combat, realistic weapons, and thrilling multiplayer battles. Dominate the arena now on Steam!
Muck is a survival-roguelike. Collect resources, find items & build a base to survive for as long as you can.
A fast-paced online arena FPS with jetpacks, hang gliders, fast respawns, 6-minute rounds and instant matches
Welcome, trainee! Use tactics and special equipment to become a true cop in the free version of Police Stories: The Academy. Neutralize criminals, search for clues and find a "rat" in the police station alone or in co-op with a partner.
Multiplayer survival horror game based on stories from the SCP Foundation. The game is about a facility containing anomalous entities known as SCPs. When a catastrophic containment breach occurs at one of the facilities, it is your main goal to escape the facility. Try to escape with your friends!
Assault Bots is a fast-paced multiplayer robot shooter game. Create your robot, let it drive, walk, or fly, and battle other players online in this intense shooter. Game features multiple maps and game modes.
Ascend Reborn is an old-school, 3rd person action RPG. Wage war as a brutal Caos warrior on your journey to Ascension. The reign of the Titans has come to an end. The New Gods have risen to claim ultimate power and need a champion. Will you rise to the challenge?
A free fast-paced online multiplayer FPS with grapple hooks where you upgrade your stats with kills!
Punch, platform, and parry your way up a perilous tower that's doing everything it can to erase your progress.
Play more of your favorite arcade hits from yesteryear. Includes SONSON for free!
A fantasy RPG that weaves a sprawling tale with quirky characters and cinematic effects. Its gorgeous, fast-paced battles feature pixel art characters sweeping though 3D playspaces.
Argentum Online, a 2D MMORPG, offers epic quests, dungeon delves, and battles in a fantasy world. Emphasizing community, it features alliances, PvP, and a player-driven economy, all within a vibrant open-world setting.
From one of gaming's most iconic sagas, Halo is bigger than ever. Featuring an expansive open-world campaign and a dynamic free to play multiplayer experience.
World of Warplanes is an aerial combat MMO action game set in the Golden Age of military aviation. The game throws players into a never-ending battle for dominance of the skies.
Voice of Chernobyl is an EXTREME Survival Shooter with intense combat that can lead to total rage until you either stand victorious or achieve what you desire.
Century: Age of Ashes is a free-to-play multiplayer dragon shooter. Master a growing roster of classes and dragons, compete in intense arena battles and rule the skies in fast-paced aerial combats.
Grab a weapon, demolish your enemies, level up, become more powerful, let the gore flow, let the limbs fly. BrainBread 2 introduces a zombie fps mixed with RPG / Arcade elements, the game is very action-packed and generally fast-paced.