可以和朋友在线一起玩的Co-op · Difficult游戏共 285 款，包括Cook, Serve, Delicious!、Spelunky和Rayman® Legends。
全部游戏: 24
Hungry? Take your restaurant from a one star abomination to a five star wonder in Cook, Serve, Delicious! Plan your menu, upgrade your equipment, and master challenges with easy-to-learn, hard-to-master gameplay!
最多四名玩家可以在本地合作，探索随机生成、可破坏的洞窟。陷阱、有限的工具和共享镜头，让团队配合和活下来同样重要。
In this award-winning platforming adventure, run, jump, and slap through the colorful worlds of the Glade of Dreams, face epic bosses, and team up in 4-player local co-op.
Hero Siege is a fast paced Pixel Art ARPG featuring an expansive roster of unique classes, deep build experimentation, and a player driven economy.
RaceRoom is free to download and built on true-to-life physics and Force Feedback. Drive DTM, FIA WTCC, WTCR and a huge library of cars and tracks—including the most up-to-date Nordschleife. Jump in, race instantly, and expand your garage with a massive selection of content.
Leap into a beloved platforming adventure that moves like a living cartoon. Punch, glide, and explore 60+ levels across the Glade of Dreams, solo or with up to three friends in local co-op.
和朋友一起进入 Realm of the Mad God Exalt，参加人潮涌动的在线首领战、探索分支地牢，并从19个职业中选择。角色阵亡后会永久消失。
在线或通过 LAN 与朋友并肩挑战色彩鲜艳、武器丰富的 FPS 战役，也可以切换到对战模式。
Take on the role of a hardened career criminal executing intense, dynamic heists in constant pursuit of the next “big score”
在Serious Sam 3: BFE的埃及战役中合作作战：线上最多16人，或本地分屏最多4人。
Magicka is a satirical action-adventure game set in a rich fantasy world based on Norse mythology. The player assumes the role of a wizard from a sacred order tasked with stopping an evil sorcerer who has thrown the world into turmoil, his foul creations besieging the forces of good.
Over 20 years of legendary space battles! Explore a massive living universe of danger and opportunity in a challenging and highly rewarding space adventure. Fight, trade, build, and connect with a universe driven and shaped directly by players.
Three years after the conflict in Chernarus, portrayed in the original Arma 2, a new flashpoint explodes in the Green Sea Region. Coalition forces led by the US Army are deployed to Takistan to quickly restore peace and prevent further civilian casualties.
Take control of Lara and her new partner Totec, a Mayan tribesman, and uncover the ancient artifact known as the "Mirror of Smoke" in this all new action adventure game.
最多16人在线合作闯过街机风格FPS战役，也可以启动Fusion 2017，与最多4人在本地分屏游玩。
和最多七位好友一起，展开一场对抗两个 AI 帝国的长期策略战役。扩张能壮大抵抗军，但摧毁敌方关键设施也可能引来更多注意。
指挥六个世界区域之一。雷达、舰队、轰炸机和核导弹发射井让 DEFCON 成为一场紧张的联盟博弈，每个人都想尽量少输。
Enjoy fast-paced multiplayer gaming with Deathmatch Classic (a.k.a. DMC). Valve's tribute to the work of id software, DMC invites players to grab their rocket launchers and put their reflexes to the test in a collection of futuristic settings.
Jill Valentine is one of the last remaining people in Raccoon City to witness the atrocities Umbrella performed. To stop her, Umbrella unleashes their ultimate secret weapon: Nemesis! Also includes Resident Evil Resistance, a new 1 vs 4 online multiplayer game set in the Resident Evil universe.
In the face of certain death, we rise. Team up and embark on a journey to the ends of hell to unlock your past and escape your living nightmare in CODE VEIN.
基础版支持双人本地合作；Synchrony扩展本地人数至4人，并加入最多8人的在线模式。每一步都要跟上音乐节拍。
A spy-chicken tries to save the world from doom in this runner/shooter game that has a little bit of everything with a touch of chicken and anime girls on top. Run for your life in 6 different worlds and shoot your way through tons of enemies until you become a legend.