オンラインでみんなと遊べるアクション（Singleplayer）ゲーム1,887本。ULTIMATE MARVEL VS. CAPCOM 3、Sword Art Online: Hollow Realization Deluxe Edition、Aegis Defendersなど。
すべてのゲーム: 24
Marvel and Capcom join forces to deliver the most frenetic 3 vs 3 tag battles ever with Ultimate Marvel VS Capcom 3. This release comes fully loaded, including all previous DLC, Marvel VS. Capcom : Official Complete Works.
2026, Sword Art: Origin, a new VRMMORPG has emerged. Kirito meets a mysterious NPC and receives a cryptic message. This game is definitively not the same as the one he escaped years ago…
Take on wild beasts, ruthless soldiers, and ancient gods in this 2D Action-Platformer inspired by Tower-Defense combat.
Total Miner is an open world voxel sandbox game. It is primarily designed for creative RPG game builders, but also has two action/adventure style game modes where you can just jump in and play.
Do you like shooting? Then arm yourself - the world of Bombix awaits you! You will find yourself in the shoes of a small but VERY dangerous fighter, gather together a team of thugs and show 'em all how to fight!
Crawl is the local multiplayer dungeon crawler where your friends control the monsters! Battle through dungeons and power up your hero - if a friend kills you they take your place and it’s their turn to crawl. It's a race to gain enough XP and loot to take on the hulking final boss!
Crashday, the explosive cult classic multiplayer racer, is back! Retooled and remastered, Crashday: Redline Edition brings back the fun and memories of the original with this lovingly crafted tribute edition, featuring all-new and expanded features, including Steam Workshop support. Today is Crashday!
The greatest rock-racing, tower defense, art history game is back! Like the title says, Bigger & Boulder cranks up the surrealism and gameplay with chaotic 4P multiplayer, new time periods, and improved graphics, physics, and destructibility powered by UE4 to be, well… BIGGER AND BOULDER.
In KILLING FLOOR 2, players descend into continental Europe after it has been overrun by horrific, murderous clones called Zeds that were created by rogue elements of the Horzine Corporation. 6-player Co-Op & 12-player VS Zed-slaughtering mayhem.
Fight’N Rage is a brand new old-school side-scroller beat’em up. Inspired by the classics from the “golden age”, and with an art style that mimics the aesthetic from the 90's arcade gems, this game pays homage to all classic gameplay features that makes this genre one of the best from its time!
Pyre is a party-based RPG from the creators of Bastion and Transistor. Lead your band of exiles to freedom through a series of mystical competitions in the Campaign, or challenge a friend to a fast-paced ritual showdown in the head-to-head Versus Mode.
Sky Rogue is a fwooshy rogue-lite action flight simulator! Blow things up over land, sea, and air, on an infinite number of procedurally-generated islands. Go toe-to-toe with enemy aces or assault giant flying aircraft carriers, but watch out for volleys of missiles; when you die, you're dead.
Step into the boots of Grayson Hunt after a crash landing on an old resort planet forces him to make a hard choice: survival or revenge. Execute masterful kills with Bulletstorm: Full Clip Edition’s unique combat system that rewards you for performing the most creative and deadly kills imaginable.
今度の異変は二人で一人？ いまだ煽り続ける都市伝説が新たな異変を引き起こす 今度の異変は二人が一人！？ならば二人で解決するしかない！
The followup to 2009's Dead Samurai, The Dishwasher: Vampire Smile is a combo-fueled, fast-paced, stylistic 2D action platformer that features the series' staple gritty, graphic novel-inspired art style, built on a new engine that allows for an even more visually gruesome experience.
Caveblazers is a challenging and brutal roguelike platformer. Journey into a mysterious cave, fighting orcs and goblins with an abundance of weapons and magical items! Make friends along the way, then watch in despair as they are crushed in to a bloody pulp under a troll's fist.
Having defeated the Campaigner, Turok throws the Chronocepter into a waiting volcano to destroy it. Unfortunately the blast awakens an even deadlier force - The Primagen. Once again a Turok is tasked with restoring peace to the land and stopping the Primagen from merging Earth with the nether world.
Rotary-wing aviation and helicopter combat with a dynamic battlefield and the support of ground forces. Appreciated for MMO elements and an addictive gameplay loop. Use tactics and make strategic decisions or fly around and shoot in historically accurate maps.
DRAGON BALL XENOVERSE 2 builds upon the highly popular DRAGON BALL XENOVERSE with enhanced graphics that will further immerse players into the largest and most detailed Dragon Ball world ever developed.
Players embark on a journey of self-discovery as they assume the role of Velvet, a young woman whose once kind demeanor has been replaced and overcome with a festering anger and hatred after a traumatic experience three years prior to the events within Tales of Berseria.
The memorable adventure of Randi, Primm and Popoi is reborn as Secret of Mana! Originally released in 1993, Secret of Mana is by far the most popular title in the “Mana” series and has now undergone a much-awaited full 3D remake!
Lead the revolution with an army of flamethrowing Boars, mustard gas-lobbing Skunks, and paratrooper-puking Owls. Tooth and Tail is a Real-Time-Strategy game featuring Single Player, Online Competitive Play, Split Screen, Replays, and more. Build a base, lead your army, eat your enemies!
Astonishing 3D cell animations and overwhelming content volume, the next-generation fighting game "GUILTY GEAR Xrd REV 2" is now out on Steam! Total cast of 25 unique characters, and tons of game modes, get ready to ROCK!
Sundered is a chaotic hand-drawn metroidvania where you resist or embrace ancient eldritch powers, a challenging and unique take on a classic genre from the creators of Jotun, now with local co-op!