オンラインでみんなと遊べる早期アクセス（Action）ゲーム457本。UnderMine 2、Path of Exile 2、GeoGuessr Steam Editionなど。
すべてのゲーム: 24
Delve into the dangerous, ever-shifting labyrinth that is the Undermine. Discover, craft, and combine hundreds of unique items. Pair them with an ever-expanding roster of distinct playable characters for a new run every time! Grab a partner and uncover UnderMine 2's secrets together in local co-op.
Path of Exile 2 is a next generation Action RPG from Grinding Gear Games, featuring co-op for up to six players. Set years after the original Path of Exile, you will return to the dark world of Wraeclast and seek to end the corruption that is spreading.
Explore the world with GeoGuessr Steam Edition! Compete against others, climb divisions, and prove your geography skills. Travel to stunning locations, analyze clues, and make your best guess. Quickplay Duels and Daily Challenge is unlimited Free-to-play.
Loot, level up, and obliterate everything in your path. Astroloot is a sci-fi bullet heaven with deep ARPG systems, featuring a massive skill tree, deterministic crafting, and near-endless build possibilities.
A lightning-fast 1–3 player co-op roguelite from the creators of Dead Cells. DASH, DIVE and DESTROY across a shattered world. Build wild loadouts, unleash devastating Alterattacks, and become the last stand against the Vortex.
Shrapnel is a 4v4 objective FPS. Operators clash in a storm-ravaged impact zone to control Sigma—a volatile resource capable of reshaping humanity’s future.
Endless Alice is a third-person action-adventure game combining Roguelite elements, anime aesthetics, and endless possibilities. Choose characters with unique combat styles and embark on adventures! Play solo or with friends in cooperative challenges for up to 4 players!
Your favorite indie formula MMO is back! Experience the evolution of formulas with up to 39 friends!
Zort is an action, adventure, and horror game that can be played with up to 4 people. Explore maps with your friends and have fun while escaping from various creatures. Experience a realistic horror experience with in-game voice chat with your friends!
Take charge of a SWAT unit as an elite operator. Command a specialized AI squad or team up in co-op to seize suspects, rescue civilians, and restore order. Study the briefing, kit out your team, and execute your plan with disciplined precision.
Set up the battlefield with an ever growing list of units, vehicles, and emplacements! Then either join the battle as a plastic soldier or be life sized and tower over the chaos.
Shadow Fight Arena is a fighting game in which you will take part in an epic Shadow Tournament. Choose your Hero and prove what you are capable of!
Join BRUTAL JOHN and BRUTAL DOG in a ultraviolent old-school FPS set in a world overrun by crypto-mining technologies, where it’s up to you to destroy them and reclaim control. Prepare for an adrenaline ride that pays homage to the best shooters of the '90s.
Paper Animal Adventure is a cute roguelike game where you can explore a colorful world, fight scary enemies, and relax with your friends at the campfire! Will you be the one to seal the timelines and find the missing king?
Toaster Arena is a first person multiplayer arena shooter where players battle it out on different maps and game modes. Use Advanced movement to traverse obstacles and gain the advantage on the battlefield.
Venture forth as part of a specialized team of fellow players tasked with retrieving classified materials, evading the black goo virus, and the nightmarish entities it has spawned. With time running out before the US government initiates a devastating nuclear strike to contain the spreading menace.
Join the rebellion against the evil corporation Blackveil in this action-packed roguelite for 1-3 players. Select your MOBA-like champion, collect RPG-style loot and infiltrate Blackveil’s massive factory. Wreak havoc, and smuggle out loot to get INSANELY powerful!
Grab your board and master the mountain! Descenders Next is the ultimate extreme sports game, with sprawling snowy peaks, winding dirt tracks, and tons of parks to conquer. Will you and your friends become the Next Ultimate Descenders?
The Last Plague: Blight is an authentic survival experience rooted in realism and immersion. Endure the hazards of a brutal open world, uncover the origins of a mysterious disease, and become humanity’s final hope of ending the Blight.
Wild Woods is a couch co-op game full of action, teamwork and woodland critters. One to four players take on the role of brave little cats defending their wooden wagon on its way through a dangerous forest. Clever cooperation is key - their way is full of obstacles!
"Mayhemers" is a multiplayer chaos creation game for up to 8 players with a procedurally generated map. Choose your side: Will you be a Mayhemer or a Guardian? Mayhemers' task is to create chaos. Guardians' task is to stop them.
Co-op horror for 1 to 6 players. Anyone can try to escape the Backrooms. You are going back in: locate the lost agents, solve the puzzles, film the entities, and hold out until extraction. Everything you carry can be lost. Your ranks, gear and storage are built to last.
Mesorift Survival is a classic survival game with PvP and PvE elements, set in a tropical open world with three islands. Gather resources, build a base, craft weapons, and survive.
AFTERBLAST is a challenging FPS roguelite. Play SOLO or in CO-OP (1-4 players). Get stronger each run. Obtain powerful abilities, weapons and find a way to save your planet. Stand up against the Gods and defeat hordes of monsters in intense bullet-hell combat!