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。
Brick By Brickは、ひとりでも最大5人の協力プレイでも楽しめる、リラックスできるお片付けゲームです。18,490個のレンガを集め、分けて、置いて、かわいい町をもう一度組み立てましょう。便利な能力を解放し、レンガの山が建物に変わっていく様子を楽しめます。ひとつずつ、コツコツと！
You are the leader of an elite squad of Republic Commandos, your mission is to infiltrate, dominate, and ultimately, annihilate the enemy. Your squad will follow your orders and your lead, working together as a team - instinctively, intelligently, instantly. You are their leader. They are your weapon.
究極のハイテクアヒルおもちゃシミュレーションゲーム、Placid Plastic Duckは、あなたに危険なレベルのリラクゼーション効果を与えます。チルな音楽、ドリーミーな3Dグラフィックス、数多くのハッピーなアヒルたちが居る中であなたはただ浮いているだけでいいのです。アヒルなんて知った事か。
The Two of Us is a 2D Co-op Platformer that has a strong emphasis on working together. You will be greeted with various puzzle levels where you must work in conjunction with your friend to navigate the level.
二つの魂、一つの運命。忘れられた大地を舞台に、協力プレイで冒険へ出よう。魔法の洞窟に潜む驚異と危険を乗り越えるには、チームワークと知恵が鍵となる。
A two-player co-op horror escape. Trapped in a haunted manor, you’ll need to solve puzzles, work together, and trust each other to make it out alive.
Two Cubes is an Online Co-Op platformer where players can only touch their colour! The game requires 2 players who own the game to play!
The Scouringは、速いペース、細部への高いこだわり、次世代の経験を備えたRTSです。人間やオークを率いて勝利を目指して戦おう！一人でも友達とでもプレイできます。改造ツールを使ってカスタムゲームモードを作成しよう！戦いに参加しよう
A game about writing nice letters to real people. Write and receive encouraging letters in a cozy room. Trade stickers and listen to chill music. We're all in this together. Sometimes all you need are a few kind words.
"Escape Memoirs: Mansion Heist" is a co-operative atmospheric reverse escape-room puzzle game. You are a master thief who has been hired to rob a mysterious mansion, filled with various puzzles. Do you think you have what it takes to conquer the challenges that await you in the mansion.
"武器やギアをマシマシにカスタマイズできるミッション制ルートシューターで、キノコのエイリアンどもをぶっ飛ばせ。 何百ものお手製アップグレード、4人協力プレイ、そしてちっちゃなゴキぶ…星人もいて、これが沼らないわけない！"
It's the zombie apocalypse, but you can't miss a work day! Scavenge for weapons, survive... and don't forget to restock the toner cartridges over at accounting. This humorous top-down shooter has you working your way up the corporate ladder, all the way to the rescue helicopter on the rooftop.
A bullet heaven where you defeat thousands of creatures, unlocking characters and equipment, then challenge deeper levels. Team up with friends or go solo; all drops are instanced so you don't have to share. One-more-run becomes a no-brainer thanks to satisfying gameplay and constant unlocks.
Skeleton Hell is a cooperative horror game where you and your friends must work together to find your missing organs and reclaim your humanity. Using your skeletal form, you can solve puzzles and collaborate with each other to escape, while avoiding the dangers that lurk within!
Super Cyborg is an old school non-stop hardcore run'n'gun action game! You are an elite battle cyborg who is sent in to investigate a series of anomalies on a mysterious island. The merciless alien known as the 'Xirxul life form' has been awakened by unwitting scientists and now: all humanity is in danger!
幻想郷ディフェンダーズはキャラクターを操作し、トラップを配置し、襲いかかる大量の妖精たちを撃退するアクションタワーディフェンスだ！ 使えるキャラクターは東方Project 各作品から20名弱が参戦！ 凍らせる、吹き飛ばす、大群で戦う、個性を活かして守りきれ！
Call your partner and become the best detective duo in this CO-OP adventure! Gather evidence, question the suspects and point out their contradictions. Cooperation is key as neither of you have the full picture of the case! Play on two devices, local or remotely, all you need is a voice connection.
『This is a Ghost』は、1〜4人向けのFPS心理的ホラー＆調査ゲームです。超常現象を追跡し、専門装備を使って悪魔的実体を特定し、クラフトした弾薬でソロまたはオンライン協力プレイで除霊しましょう！
Join up to three friends in this mouse-sized adventure! Explore, gather resources, solve puzzles, and battle enemies as you try to bring your kidnapped brothers and sisters home.
"Escape Memoirs: Safe House" is a co-operative reverse escape-room puzzle game. You are a member of a criminal organization who must break into one of their own safe houses to fetch some important tools. Do you think you have what it takes to overcome the puzzles that stand in your way?
Explore abandoned biospheres at the bottom of the ocean, alone or with up to 4 friends.
Serpent’s Gaze は、壮絶な戦いと古代砂漠の謎が待ち受ける、1～4人協力型の三人称アクションゲーム。強敵や容赦のないボス戦に挑みながら、失われた秘密を解き明かせ。
Anima Fluxは、1画面で協力プレイができる横スクロールゲームで、独裁神政権の特殊エージェントである2人の遺伝子強化兵士が活躍する。どこか寂し気で暗い宇宙都市を駆け抜けて、ミュータントの群れを薙ぎ倒し、人類最後の砦を救おう…もちろん、生存者がいればの話だが…
'Escape Memoirs: Questionable Side Stories' is a humorous co-operative escape room game where you are a henchman who has to make his way through variety of puzzles to make it to a job interview on time. Can you solve all of the puzzles that stand in the way of your employment?
同じ穴の「鳥」仲間と、パズルを解こう！友達（あるいはこれから友達になる人）と一緒に挑む、2人用オンライン協力パズルアドベンチャー
ヨーロッパの空へ。第二次世界大戦の最も危機的な日々での戦闘に挑みます。
栄光への究極の探求。戦場に陣形を描き、おもちゃの軍隊を指揮してライバルを包囲し、欺き、出し抜こう。でも気をつけて！ライバルとぶつかり合えば、物理学にしたがって兜は飛び散るぞ！最もグラグラするストラテジーゲームで軍隊を勝利に導こう！シングルプレイヤーとマルチプレイヤーモードの両方で大規模なバトルを作成します。
Use Nukes, Electricity, Heat Rays and powerful Minions in this wave-based first person shooter providing endless hours of Ghost-slaying entertainment, solo or Co-Op. Only Ghosts stand in the way of your invasion of Earth.
昼間は防御を整え、夜明けまで生き延びろ。《防衛兄弟》は、タワーディフェンス型Roguelikeゲームで、あなたは基地を守る兵士を演じる。レベルが上がるにつれて、さまざまな能力から選択することができ、戦闘ラウンドの終了後には、自分を強化するためのボーナスを購入することもできる。
the cabin game is a 1-4 player, chaotic horror game where you are trapped inside a cabin and the only way out is through a game of cards. Just beware, as the cards you play have a surprising twist on this humble abode...
A game about organizing, stacking and remembering where you put hundreds of books in a cozy-creepy medieval library. Play solo or with up to three fellow monks.
ミニマリストスタイルのタワーディフェンスゲーム。気軽にリラックスしてプレイでき、難易度も中程度です。タワーフォーメーションを構築して敵を撃退しましょう。オンラインマルチプレイヤーにも対応しているので、チームを組んでかつてないレベルのタワーディフェンスの楽しさを体験できます！
Kallax is a chaotic furniture-building 2 to 6 players co-op game in which only one player can read the instruction manual at a time. Experience what should have been a one person's job and lose friendships forever.
🐸Free-To-Play🐸 Stop following someone else's route. Create your own way to the top by building your own path 🐸 Frog Climb is a stylized co-op climbing adventure where you must escape from terrariums 🐸 Level up, gain powerful upgrades, and prove that no wall is too high for a frog with a plan 🐸
consume WHITE CHOCOLATE to escape this pitch black facility. share it with that vile creature that survived alongside you. or dont, be an nuisance, it's always profitable to be an nuisance.
Electoral Carnage is an absurd 2D fighting game featuring America's most famous (and infamous) politicians. If you don't download it you hate America. Also JFK can assassinate himself. What more do you need to know?
