《Sanctum 2》：先建防线，再加入战斗
《Sanctum 2》把塔防建造与第一人称射击结合起来，支持最多四人在线合作战役。你和朋友要守护产氧核心，布置角色装备，并可在完成战役后继续挑战生存模式。
7,460 篇评测中 91% 为好评当前玩家: 16US$14.99
Sci-fi · Singleplayer：适合一起玩的游戏
可以和朋友在线一起玩的Sci-fi · Singleplayer游戏共 426 款，包括Sanctum 2、Gunpoint和Earth 2150 Trilogy。
全部游戏: 24
Gunpoint
Gunpoint is a stealth puzzle game that lets you rewire its levels to trick people. You play a freelance spy who takes jobs from his clients to break into high security buildings and steal sensitive data.
10,279 篇评测中 97% 为好评当前玩家: 4US$9.99
Earth 2150 Trilogy
Your heroes and your armies will need strong leadership to take them on a spellbinding odyssey that has everything a gamer’s heart could wish for breathtaking worlds in space, battles against cunning enemies and even downright treason from your own government faction - are you up to it?
456 篇评测中 76% 为好评当前玩家: 8US$4.99
Sonic Adventure 2
Experience two unique adventures featuring both long-time heroes and new and returning villains as they battle for the fate of the world!
23,916 篇评测中 89% 为好评当前玩家: 277US$9.99
PixelJunk™ Shooter
In PixelJunk™ Shooter, you must pilot your spacecraft through a range of cavernous environments in a bid to save the scientists trapped underground. Making your way through the game will rely on your keen sense of observation and the ability to manipulate your surroundings.
251 篇评测中 92% 为好评当前玩家: 1US$8.99
ORION: Prelude：与伙伴并肩对抗恐龙大军
守住发电机，在每波敌人之间购买强化，并邀请最多四位好友加入 ORION: Prelude 原版的五人合作模式。
19,055 篇评测中 76% 为好评当前玩家: 32US$9.99
Revolution Ace
A deep, tactical shoot'em up. With every takedown, you’ll earn cash and xp to upgrade your ship and unlock new abilities. Online and local co-op. Unique versus mode. Realistic physics and water simulation.
1,479 篇评测中 70% 为好评当前玩家: 1US$4.99
Sins of a Solar Empire: Rebellion：与好友共治星海
多人模式面向最多十名玩家，包含互联网和 LAN 合作及 PvP 选项；与好友共同建设帝国、对抗 AI 势力，并在六个派系和多种胜利目标之间选择。
10,258 篇评测中 93% 为好评当前玩家: 314US$19.99
Pandora: First Contact
Pandora: First Contact is a science fiction 4X turn-based strategy game on a planetary scale. Our Earth has been exhausted and colonial attempts on other planetary bodies have been in vain. Finally, after decades of exploration, an interstellar probe has brought promise of a new world.
539 篇评测中 61% 为好评当前玩家: 2US$29.99
Space Hulk (Classic)
The legendary Space Hulk returns in this epic turn based strategy game. Set in the Warhammer 40,000 universe, an intriguing story of legendary battles and heroic actions unfolds.
1,579 篇评测中 70% 为好评当前玩家: 3US$11.99
ENDLESS Space™ - Definitive Edition
ENDLESS Space™ is a turn-based 4X strategy game, covering the space colonization age in the ENDLESS Universe™, where you can control every aspect of your civilization as you strive for galactic domination.
6,632 篇评测中 78% 为好评当前玩家: 69US$9.99
Iron Brigade
Join The Mobile Trench Brigade and protect humanity from the evil Monovision menace!
917 篇评测中 86% 为好评当前玩家: 8US$14.99
Rise of the Triad
Apogee Software and Interceptor Entertainment proudly present the rebirth of the cult-classic first-person shooter, “Rise of the Triad”. Bigger, better and more ludicrous than ever before.
1,907 篇评测中 66% 为好评当前玩家: 3US$14.99
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。
12,066 篇评测中 89% 为好评当前玩家: 140US$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。
21,904 篇评测中 86% 为好评当前玩家: 113US$29.99
Cortex Command
Choose between different factions, with their own set of expendable soldiers, mechas, and weapons. Protect your brain, mine gold, and destroy the enemy cortex in his bunker complex!
2,002 篇评测中 82% 为好评当前玩家: 2US$19.99
Portal 2
The "Perpetual Testing Initiative" has been expanded to allow you to design co-op puzzles for you and your friends!
392,510 篇评测中 98% 为好评当前玩家: 2,451US$9.99
LEGO® Star Wars™ III - The Clone Wars™
LEGO Star Wars III: The Clone Wars will allow fans to explore endlessly and laugh their way through the Star Wars galaxy in the most humorous, accessible and action-packed LEGO game to date.
7,244 篇评测中 93% 为好评当前玩家: 116US$19.99
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。
6,310 篇评测中 83% 为好评当前玩家: 17US$9.99
Planets Under Attack
Play as humans or robots in a brand new sci-fi strategy adventure! Travel into the far reaches of space, through cleverly designed star constellations and variable game modes, conquering enemy planets using 15 combinable technologies.
319 篇评测中 63% 为好评当前玩家: 3US$2.39
STAR WARS™ Empire at War - Gold Pack
Command or corrupt an entire galaxy in the definitive Star Wars strategy collection. It is a time of galactic civil war. Will you take up the reins of the Rebellion, assume control of the Empire, or rule the Star Wars Underworld?
36,325 篇评测中 96% 为好评当前玩家: 1,950US$19.99
Sword of the Stars: Complete Collection
Sword of the Stars: Complete Collection is the original Sword of the Stars games and the three expansions Born of Blood, A Murder of Crows and Argos Naval Yard. It is the year 2405, and human scientists have discovered a new technology that allows travel from star to star at speeds faster than light.
591 篇评测中 86% 为好评当前玩家: 33US$9.99
LEGO® Star Wars™ - The Complete Saga
Kick Some Brick in I through VI! Play through all six Star Wars movies in one videogame! Adding new characters, new levels, new features and for the first time ever, the chance to build and battle your way through a fun Star Wars galaxy on your PC!
20,856 篇评测中 96% 为好评当前玩家: 285US$19.99