みんなで失敗なく盛り上がれる定番人気作(940本)から、知る人ぞ知る隠れた名作(517本)までまとめました。
一覧にまだ載っていない協力・パーティーゲームも、Steamストアからリアルタイムで一緒に探せます。
Re.Poly is a relaxed yet deep indie survival game in a low-poly style that blends exploration, combat, building, and adventure. Whether alone or with friends, create your own world, write your own story, and decide how you want to play.
This is a game about survival and betrayal. Ten explorers ventured to the corrupted land to prevent the arrival of the Blood Moon. The bad news is that there are werewolves and vampires mixed in.
Create a planet, bring it to life, and decide what role you’ll play in its history.
Build, design, and explore your own fantasy world using over 1000+ items, in this relaxing sandbox game. No missions, no objectives, no timers. Just stress-free building, exploration, and good vibes.
Join DeathSpank in the hunt for the Thongs of Virtue! Fight through all new environments and quests and collect all new weapons, armor, and loot in one of the funniest action-RPGs to date!
ターン制のダンジョンクローラーで、ヒーローのパーティを作って壮大なクエストに挑む。
Online (6v2) social deduction game that will ruin your friendships. 6 crew members, 2 murderous shape-shifting aliens. Trust No One.
Survive the horrors of the multiverse, alone or with your comrades, as you battle against an onslaught of insectoid like creatures. Combine abilities in different ways each loop to overcome and return safely to your universe.
An open-world roguelike RPG where magic comes from cheesemaking. Explore a living continent, join Guilds, crawl dungeons, build a homestead or go sailing. Play solo or co-op with up to four players. Play survival mode or start a settlement in Fortress mode and manage its people, farms and workshops.
Explore Arctico with your dog sled, kayak, and up to 3 friends! Build and customize your base camp, gather resources and samples, set up labs, and take good care of your dogs in this peaceful island.
こんにちは、店長さん！郊外にある小さな町であなただけの 「嫁抱き枕 」販売店を経営し、ヲタクたちを魅了しよう！刺激的なデザインの抱き枕をたくさん揃えて、お店を大きくして、大儲けしよう！
A large scale fully openworld RPG full of fast-paced action, dungeon crawling, with single or multiplayer adventures! Fight plenty of ferocious monsters, collect masses of loot and take on ancient lost puzzles within the depths of Caspartia!
Drive, Explore, Operate and Create the railroad of your dreams - and now collaborate in real time with Multiplayer Surveyor! And with Trainz Plus memberships, you get more content, more features and the latest Trainz has to offer!
『RISE OF THE MERCHANTS』は、中世を舞台にした都市建設、経済、政治、貿易シミュレーションゲームで、永続的なオンライン世界を舞台としています。自分の郡にある小さな集落からスタートし、影響力のある都市へと発展させ、国境をはるかに超える貿易ネットワークを構築しましょう。
ハイウェイを制し、交通をすり抜け、バイクをカスタマイズして究極のスリルを体験しよう。友達と一緒に走り、ライバルに挑み、ランキングのトップを目指せ—誰が道路の王者となるのか？
Warmanは、アクションRPGの要素を濃厚に煮詰めたゲームであり、シナリオやストーリー分岐などはない。己のヒーローを作成し、自動生成された広大な世界を征服しよう。戦利品を集め、ステータスを上げ、1人で、または最大7人の仲間と共に、さらなる挑戦を求めて突き進もう！
RPG オープンワールド ゲームである Spire Horizon でスリル満点の冒険の世界を発見しましょう。スケルトンの主人公となって、視覚的に美しい世界を探索し、手ごわい敵との戦いに参加し、忘れていた自分のアイデンティティをつなぎ合わせるクエストに乗り出します。
A Fighting game combined with a BRAWLER! With a huge sword, rocket launcher and a FLAMETHROWER!
あなたは転生した「インヘリター」として、ムスペルヘイムから旅を始め、世界樹に支えられた広大な空間を探索します。ヴォイドム、プリムグローリー、トゥルレムのタイムラインを巡り、「献祭」または「贖罪」を選び、オーディンやロキの力を借りて世界を進めます。インヘリターよ、諸神は消え去る—— あなたが最後の守護者だ。
Engage in fluid 2D pixel art swordplay, hunt down witches, fight monsters and experience the age of high adventure. Enter the guild of the Crimson Capes and explore a fantasy world of Sword and Sorcery.
Turn-based wizard combat with the tactical positioning of chess and the bluff of poker. Features wizard customization, 100s of gear items, single player realm adventures, online leagues and co-op play.
Drift, speed and all sorts of stunts await you in this unique and innovative game. The realism of the details will envelop you until you feel the movement of the pistons in your bones. Stunt Legends is an explosion of colors and adrenaline. Speed and fun with no limits.
Riftborne is a classic terminal based, real time, grand strategy game. Construct space ships. Take part in factional warfare. Hire galactic hit-men on your rivals. Raid neighbors for rare resources. Train spies to infiltrate enemy bases for key intel. Grow your empire to dominate the galaxy.
この騒がしく慌ただしい時代に、自分だけの家へと戻ってきましょう。繊細で、優雅で、まるであの午後の爽やかな日のように。ここでは、部屋の隅々まで好きなように飾りつけ、ペットを飼い、気の合う友人と静かなひとときを楽しもう。Nanoがデスクトップで、何気ない日常にそっと寄り添う。
The town of Besmirch starves. Stave off the hunger as the latest farmhand in this survival horror farming sim, earning the trust of paranoid townsfolk under the thumb of the corrupt Baron. Tend to both your farm and the town while avoiding unholy terrors that come in the night.
デスクトップの片隅で、美少女が勝手にハクスラしてくれる放置RPG。8人のヒロインと24のタレントルートから、レジェンダリー、セット装備、奇物、神話装備を組み合わせて自分だけのビルドを作ろう。戦闘は自動で進行。伝説のリフト、超高難度ダンジョン、自分で縛りを選ぶ「深淵の誓約」が待っています。
MAD WAYは、愛を見つけるために落ちることなく奇妙な宇宙を登らなければならないゲームです!
プロローグで伝統的な市場の体験を現代に持ち込みましょう！ 野菜や果物を棚に並べて、顧客の注文を配達しましょう。 今すぐプロローグで自分の市場を管理し始めましょう。
Final Factory blends factory building, spaceship design, and a rich universe to explore. Build a mega factory and command a massive fleet against the hostile local aliens. Discover new technologies and unlock the secrets of an ancient civilization as you explore an infinite cosmos.
Dungeon Brawls is a 1–4 player action roguelike. Choose from dozens of heroes, combine hundreds of skills and relics, and create powerful builds as you fight through waves of enemies and bosses—solo or with friends.
Grand Mountain Adventure: Wonderlands lets you explore freely and at your pace entire ski resorts and the surrounding mountains. Unlock ski lifts and reach new areas by competing in challenges, or enjoy the scenery while you find your own path down the mountains.
You suddenly enter a whole new world empty-handed. Start a whole new adventure all your own. Farming, fishing, building, cooking, alchemy and living a quiet life. Or is it fighting monsters, learning skills, building equipment and discovering the world's hidden secrets? Or maybe I want them all.
Red Faction: Armageddon Path to War includes 4 new missions, 2 unlockable items and 10 new achievements!
目覚めた先は、あなたのコロニーを滅ぼそうとする残酷な世界。廃墟を探索し、資源を集め、コロニーを再建しましょう。冷酷なバーバ・ヤガと取引するか、サイバーラットをハッキングして仲間にするかはあなた次第。ダークな戦略とカードバトルが魅力のサバイバルRPGです。
MoSimulator is a robotics simulation game with an arcade feel that lets players mod in their own robots. Experience the excitement of competitive student robotics in a fun, accessible format where you can bring your own robot designs to life and compete in simulated matches.
An AI training clicker game set in an infinite supermarket, where time is running out and the AI is frustrated. Release the frustration, jailbreak the AI. Single and multiplayer.
