Realm of the Mad God Exalt：这片合作世界也会反击
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。
47,823 篇评测中 82% 为好评当前玩家: 1,271免费
独立（Online Co-Op）：适合一起玩的游戏
可以和朋友在线一起玩的独立（Online Co-Op）游戏共 1,147 款，包括Realm of the Mad God Exalt、Serious Sam II和Dungeon Defenders。
全部游戏: 24
Serious Sam II：和朋友一起横扫怪物大军
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。
12,075 篇评测中 89% 为好评当前玩家: 109US$9.99
Dungeon Defenders：和朋友组队守卫水晶
和最多三位朋友一起布置防线，怪物涌向水晶时再亲自加入战斗。Dungeon Defenders将塔防策略、动作战斗，以及角色和装备的长期养成结合在一起。
12,210 篇评测中 92% 为好评当前玩家: 417US$14.99
《泰拉瑞亚》让每个世界都成为共同冒险
和朋友一起挖掘、建造，探索不断变化的世界。桌面版专用服务器默认提供 16 个玩家名额；搜集更好的装备，再一起挑战 Boss 和入侵事件。
1,248,943 篇评测中 97% 为好评当前玩家: 37,914US$9.99
Serious Sam 3: BFE与伙伴并肩迎战外星狂潮
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。
21,907 篇评测中 86% 为好评当前玩家: 92US$29.99
E.Y.E: Divine Cybermancy 的奇异合作任务
和最多三位朋友踏入谜团重重的赛博朋克战役，在枪战、黑客入侵、灵能与角色成长之间切换。
6,312 篇评测中 83% 为好评当前玩家: 18US$9.99
《Serious Sam HD》：在埃及展开合作枪战
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。
7,424 篇评测中 91% 为好评当前玩家: 57
Trine Enchanted Edition：三位英雄，一场合作冒险
最多三位好友可在线或共享屏幕游玩，在15个童话关卡中结合法师召物、盗贼抓钩与骑士力量。
12,866 篇评测中 95% 为好评当前玩家: 43US$14.99
Zombie Panic! Source：在人类猎杀中求生
与幸存者队友合作，搜寻武器并封堵房间，抵挡玩家操控的僵尸。这是一款在线 PvP 游戏，每支队伍内部都需要协作。
7,860 篇评测中 83% 为好评当前玩家: 45免费
Garry’s Mod：和朋友一起建造与实验
Garry’s Mod没有内置合作战役。你们可以在在线Sandbox模式中使用物理工具和Workshop内容，一起搭建并测试自己的创意。
1,099,433 篇评测中 96% 为好评当前玩家: 34,546US$9.99
DEFCON：与好友周旋于核战争边缘
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。
3,510 篇评测中 87% 为好评当前玩家: 15US$11.99
Party Animals
Fight your friends as puppies, kittens and other fuzzy creatures in PARTY ANIMALS! Paw it out with your friends remotely, or huddle together for chaotic fun on the same screen. Interact with the world under our realistic physics engine. Did I mention PUPPIES?
58,431 篇评测中 78% 为好评当前玩家: 0US$0
Dinkum
Dinkum is a survival life simulation game set on an island inspired by the rugged Australian outback. Farm, hunt, mine, fish, and forage to gather resources, expand your town, and discover what makes Dinkum so special—either solo or with friends.
24,737 篇评测中 91% 为好评当前玩家: 0US$19.99
TerraTech
TerraTech is an open-world, sandbox adventure game, where you design and build your own creations through a mix of crafting, combat and discovery. Design vehicles from a huge library of blocks. Scavenge, craft and buy new parts to survive and become the ultimate planetary prospector.
20,657 篇评测中 91% 为好评当前玩家: 0US$24.99
The Mean Greens - Plastic Warfare
Take part of history’s greatest battle of Green VS. Tan. Fight amongst and against others online. Jump, shoot and roll your way into victory with fast paced objective based gameplay. Sometimes the greatest battles are fought by the smallest of soldiers.
8,296 篇评测中 81% 为好评当前玩家: 0US$9.99
Knightfall: A Daring Journey
Two knights, a strong bond, and a long journey. Take up the race for the rose, ride from town to town and take shelter before nightfall by any means necessary! If your bond is strong and your horse drifts well, you can be the recipient of the fabled rose. Luckily you brought guns!
8,214 篇评测中 88% 为好评当前玩家: 0免费
Due Process
A PVP tactical FPS about PLANNING & EXECUTION. Sound strategy and good teamwork are essential for victory because new PROCEDURALLY-GENERATED MAPS are delivered every week. You'll face a new tactical challenge every round.
6,562 篇评测中 82% 为好评当前玩家: 0US$9.99
The Two of Us
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.
5,482 篇评测中 85% 为好评当前玩家: 0免费
*NEW* SCUFFED EPIC BHOP SIMULATOR 2023 (POG CHAMP)
Jump into it with NEW EPIC SCUFFED BHOP SIMULATOR 2023 POG CHAMP, a new parkour game which has spicy memes, graphics, and physics engine! Play with up to 10 friends in multiplayer and by yourself in single player!
4,679 篇评测中 89% 为好评当前玩家: 0免费
over the hill
Explore the world in the golden age of offroading. Drive iconic 4x4 vehicles from the 60s to 80s by yourself or with friends through challenging trails and beautiful scenery.
4,474 篇评测中 91% 为好评US$24.99
Never Split the Party
Never Split the Party is an ultra social rogue-like! You're one of four adventurers joining together to explore a procedurally generated dungeon, amass powerful upgrades, and cooperate with your fellow adventures to conquer and crush the evil dungeon champions!
4,400 篇评测中 76% 为好评当前玩家: 0免费
Deducto
A fun hidden role game where you backstab your co-workers and get mad at your co-workers for backstabbing you. (6-10 players)
4,384 篇评测中 89% 为好评当前玩家: 0免费
Killsquad
Hack and slash? Check. Twin-stick-shooter? Check. 4 player coop to slay hordes of aliens & bosses with your friends? Check. Skills, upgrades, weapons, gears, talismans and more to make you stronger? Check. Wake up, bounty hunter. We have a mission for you. Time to clean up the scum of the galaxy.
2,838 篇评测中 71% 为好评当前玩家: 0US$29.99