
It Takes Two
フレンドパスで1人購入すれば最後まで2人で遊べるGOTY受賞の2人専用名作。
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。

フレンドパスで1人購入すれば最後まで2人で遊べるGOTY受賞の2人専用名作。

1人が購入すればフレンドは無料招待。異なる機種でも遊べる2人専用協力作。

目が回るほど忙しいのに、不思議ともう一度遊びたくなる。

The Expendabros have assembled and set their sights on the forces of ruthless arms dealer Conrad Stonebanks in the forests of Eastern Europe.

Double Action is a free stylish multiplayer game about diving, flipping, and sliding your way into action movie mayhem.

Bronzebeard's Tavernは1-8人の協力マルチプレイヤーで遊べるドタバタ食堂経営シミュレーターゲームです。いくつもの仕事をこなし、多種多様なお客さんにサービスを提供し、美味しいドワーフ料理を作りましょう。

An online multiplayer game about shapeshifting deception and betrayal! As a hapless, brave spaceman employed by The Company you'll work diligently to defend and be rescued from failing outposts, but not everyone around you is who they claim to be...

ボイスチャット付きのマルチプレイヤージグソーパズル!1人で、またはお友だちと一緒にプレイし、みんながテーブルの周りに座っているように感じましょう。何百ものパズル画像、または独自の画像を使用!

DYO is a mind-bending cooperative platformer for one or two players where you can hop between two halves of a split screen.

Unleash the apex worm in you! Join a world where you eat to grow and aim to become the largest worm around. Dodge viruses, cut off enemy paths, and indulge in addictive multiplayer action. Custom skins, game modes, and more await!

Face the varied challenges of the Machine God Zir in ARENA, a standalone expansion for Synthetik: Legion Rising! Leverage the next level in gun-play and experiment with powerful tech in varied action packed Arenas!

Unsung Warriors is a 2D action-adventure game set in Iron Age inspired Europe. Fight your way past enemies and traps, while exploring the secrets of an ancient crypt.

Would you enjoy building CASTLES, traps and siege machines in MULTIPLAYER? And then undermine your opponents castle and collapse it with 2D PHYSICS & DESTRUCTION?

Play free and try tables in trial mode with Zaccaria Pinball, featuring 175+ tables, including 40+ officially licensed from Zaccaria was founded by three brothers: Marino, Franco, & Natale. Zaccaria was one of the three largest pinball manufacturers in the world, next to Bally & Williams.

A team based PVP game where groups of up to 8 players must work together to operate a tank!

小さな王国を強大なドミニオンに拡大しましょう!世界中で何百万人もの人々に愛されている、Spiel des Jahres の優勝ボードゲームをプレイしてください。ジャンルを定義したゲーム、ドミニオンはデッキ構築を最初に普及させたゲームであり、今でも卓上ゲームの定番となっています。これは正式にライセンスされた実装です。

Beavers be Dammed is a two player local co-op game in which two beavers perform heists under time pressure to steal wood from a sawmill under crazy circumstances!

フレンドパスをダウンロードして、『オペレーション:タンゴ』 本編を持っているフレンドと一緒に無料でゲームをプレイしよう。コンビを組んで世界を救おう。フレンドを無料プレイに招待して2人で挑戦しよう。

A fun hidden role game where you backstab your co-workers and get mad at your co-workers for backstabbing you. (6-10 players)

8Bit Fiesta brings everything you need to the table with its action packed local multiplayer mayhem including a built in drinking game! Choose between a ton of characters and challenge your friends and prove yourself worthy the title "King of the Fiesta".

瞑想のリズム・ピンポン

The two adventurers Handy and Dandy have caused a dimensional tear which is now separating them and the entire cave where they have to solve platforming puzzles to reunite again in this 2D co-op game.

最高にワイルドなアニメ調バトルの体験版。超高速で飛び、対戦相手をぶっ飛ばして高層ビルを突き破り、一撃で惑星をぶっ壊せ!ローカルは最大4人、オンラインは2人までマルチプレイ可能。

With 100+ truly unique units, Zero-K is an RTS of freedom and creativity, tempered by a decade of refinement. Sculpt land into a castle and throw invaders off it with a Jugglenaut. Explore a massive campaign, solo or co-op. Hop online for epic 32 player battles or fast paced 1v1, on 100s of maps.

Battle friends over air, land and sea in this epic WW2-themed battle strategy game.

Experience an innovative co-op adventure where two players have to work together. Engage in collaborative puzzle solving and dynamic combat with each player having unique abilities. Delve into a psychological narrative that explores the essence of humanity.

『Dark Hours』:Prologueは、1~4人でプレイする無料の協力型サバイバルホラーゲーム。あなたは超自然的な出来事に強盗の邪魔をされ、チームメイトは怪物に捕らえられてしまう。計画のことは忘れて、生き残ることが先決だ。仲間と協力して出口を見つけるか、身を隠して太陽の日が昇るのを待て。

新たな手がかりが未解決事件の既存の疑いを覆します。罠なのでしょうか、それとも模倣犯なのでしょうか?この協力型パズルゲームの前日譚で、探偵バッジを身につけ、協力し、コミュニケーションを取りながら、暗号を解読し、謎を解き、謎のキラーを捕まえましょう。

Windows/Mac/Linux版を配信中!

Dance the tango of death in Grabity, a fast-paced, physics-based arena brawler. Combat robots duke it out using Grab guns to turn nearby objects into lethal projectiles or makeshift shields in intense tactical throw-downs.

自分だけの冒険者一行を率いて、テーブルトークRPGにインスパイアされた壮大な冒険に乗り出そう。フレンドパスを使ってフレンドを招待するもよし、単身で挑むもよし。協力、裏切り、ダイス運….キミたちを待ち受ける運命や、いかに。

Infected Shelter is an ultra-violent rogue-lite post-apocalyptic beat'em up. Singleplayer and co-op for up to four players.

Get ready to drink and drive (safely). Challenge friends in multiple drinking and driving game modes, like drunk cop chases, pedestrians, races, capture the flag, hot potato, and more! With options to change the style of play, there is so much drunk driving fun!

Welcome to Mythgard, a fantasy cyberpunk CCG of heroes, gods, and mythical beasts. Master the unique lane and mana systems in your rise to the top or enjoy team play with a friend. New players can use the code WelcomeChallenger to get 20 free packs and more to start their journey.

A high-octane, stunt, arcade game with an addictive combo and trick-based gameplay set in a retro arena. Get behind the wheel - jump, drift, stunt, and compete with others on the way on top the global leaderboard. It’s time to GET REKT!

最初のレベルの初期バージョンを無料でプレイしよう!謎の島に漂着したあなたと友人の2人。協力してパズルを解き、家に帰る道を切り開こう。同じ思考法では脱出できない。「In Sink」、すなわち2人の思考と行動が合致していなければならないのだ。