オンラインでみんなと遊べるアクション（2D）ゲーム840本。Special Tactics、This Is No Cave、Radical Rabbit Stewなど。
すべてのゲーム: 24
ST brings the most intense, tactical-action experience to Steam. Select your custom loadout, plan out strategies and accomplish your objectives. Addictive Survival mode and unrivaled multiplayer including Squads (1 vs 1, 2 vs 2, 2 vs 1)
A one-click parkour game in space. Zoom through intricate levels using your suit's thrusters and grapple hook, all while evading colossal alien worms and racing against the clock.
Radical Rabbit Stew is a hare-raising action-arcade game, featuring fast-paced whack-a-rabbit gameplay, scintillating puzzles, super-sized boss fights, juicy pixel graphics and a sizzling soundtrack, perfect for new players and 16-bit retro fans alike!
A 2D party platformer where you fight with a hat! Throw your hat to attack, defend and bait opponents. But watch out! If someone jumps on your hat... you die!
Dive into the Ocean Keeper – a cooperative roguelike where four survival miners defend their Mech Spider, fight with endless hordes of monsters, and dig for resources. Team up with your friends, upgrade between waves, and survive the deep caves, full of treasures… if you can.
Prepare yourself to Click... Real... Fast. Push your mouse, keyboard, or controller to its breaking point—if it has buttons, it probably works. Click Real Fast and see who survives: you, or your hardware.
Gimbal is the multiplayer shooter with buildable vehicles. Customize your weaponry, engines, and accessories, and then take to the skies against other pilots in real time.
For the very first time, highly acclaimed Japanese Arcade Shoot’em Ups - VASARA (2000) and VASARA 2 (2001) - are made available to the whole world via this package: VASARA COLLECTION!
The cataclysmic battle between giant monsters has begun in this manga-inspired, side-scrolling, kaiju beat-'em-up!
Vanquish the Kaiser's Imperial Fleet using timing, tactics and telegraphy in MORSE, a minimalist strategy game that teaches you the secret language of Morse code. Can you change the world with the push of a button?
Twilight Frontier's latest release is here! A Touhou Project inspired work: "MarisaLand Legacy" Eat mushrooms to increase your height in this easy to control 2D side scrolling action game! But it's not only her height which has changed, the number of players too! Marisa's adventure starts once more...!!
Shizuku and Akane...two pilots bound by rivalry and friendship battle to save their world from malevolent cosmic forces! A classic arcade style shmup with deeply satisfying fast paced combat, wide variety of load-out combos, and even local co-op!
Steel yourself for a relentless display of might and muscle…brawn and bravery…magic and mayhem! Inspired by heroic fantasy fiction, Tiny Barbarian DX combines engaging 2D platform action and combo-based hack-and-slash combat with retro-style pixel art and a loincloth-stirring chiptune soundtrack.
You play the psychotic A.I. of a warship lost in space which tries to come back to Earth. Build your spaceship from scratch. Load it with weapons. And use your creation to destroy waves of innocent aliens throughout numerous levels. Loot their carcasses, extend your ship and jump to the next sector for more action!
A 2D sandbox survival game designed for creators, players, and everyone else.
Gnome Online is an innovative, Real-Time, fast-paced, PvP, Sandbox MMORPG.
Why play shoot 'em ups one ship at a time? Launch them all at once! Unleash an entire armada of ships in Shoot 1UP!
Choice Chamber is a real-time, crowdsourced, procedurally generated game where your fate is in everyone else's hands.
Switch up the fun with four games in one! As cybernetic peacekeeper Officer Patricia Wagon, you'll use your platforming skills, puzzle-solving abilities, and level-altering Siren Helmet to catch criminals, extinguish infernos, and smash enemies. Four-player co-op and versus modes included!
Take on the role of the martial arts master Hiro, Meilin, or Shin as they face off in a desperate fight for their lives against the Black Mantis clan. DOUBLE THE MAYHEM: Bring a friend and battle against ninjas, demons, and more in the 2-player local co-op mode of this action-adventure platformer.
Play as Cobra, the space pirate, in an action platformer. Along with Lady Armaroid, your loyal partner, and equipped with your iconic Psychogun, you must solve a mystery that could threaten the entire universe.
Tossed aside and cast out. It's time to claim your birthright. Rise as Lucifer and battle the armies of the afterlife and ascend through the weird and warped realms of heaven and claim vengeance.
Fast. Bloody. 8-Player Mayhem. Dominate. Taunt. Repeat. Free. No strings attached. Ever.
A survivors-like about a time-travelling company where you recruit your employees against endless hordes of enemies.