编辑“︁Potato Sack”︁（章节）

=== 首轮更新 ===
[[File:Potato-sack-phase-1.svg|thumb|350px|right|第一个阶段中，玩家发现包含16个辅音的短语，会找到最终形成字幕位图图像的4x4网格，之后和其他字母组合，就能找到完整密码。]]

Potato Sack包发行日，玩家发现所含游戏最近获得更新。大多数更新直接改变了外观，改换或增添了和马铃薯有关的物件。玩家开始深入探索这些新物件，发现一系列和特定字母有关的指向其他游戏的象形文字，还有指向特定密码的无意义句子<ref>{{cite web | url = http://www.escapistmagazine.com/news/view/108965-Portals-GlaDOS-Invades-Steam-With-Potato-Related-ARG | title = Portal's GlaDOS Invades Steam With Potato-Related ARG | first = Tom | last = Goldman | date = 2011-04-04 | accessdate = 2011-04-04 | publisher = Escapist | archive-date = 2011-04-05 | archive-url = https://web.archive.org/web/20110405204100/http://www.escapistmagazine.com/news/view/108965-Portals-GlaDOS-Invades-Steam-With-Potato-Related-ARG | dead-url = no }}</ref><ref>{{cite web | url = http://www.shacknews.com/article/68001/valve-hides-arg-in-potato | title = Valve hides ARG in Potato Sack sale | first = Steve | last = Watts | date = 2011-04-04 | accessdate = 2011-04-04 | publisher = Shacknews | archive-date = 2011-04-05 | archive-url = https://web.archive.org/web/20110405234136/http://www.shacknews.com/article/68001/valve-hides-arg-in-potato | dead-url = no }}</ref>。其他不那么直接的线索则利用了[[Twitter]]和[[YouTube]]等网站嵌入。在《小鸡快跑》的例子中，少部分新关卡包含了指向Two Tribes总部经纬度坐标的[[盲文]]代码。一位叫“Jack_R”的玩家亲自前往Two Tribes，找到了贴在总部外面的象形文字和暗号。Two Tribes的开发者知道他在场，开始在对面街的理发店拍他。他们后来利用他攀爬柱子寻找线索的影片，制作了第二阶段的另一个线索<ref name="twotribes dev">{{cite web | url = http://twotribes.com/message/what-we-did-for-the-portal-2-arg/ | title = What we did for the Portal 2 ARG | publisher = Two Tribes | date = 2011-04-22 | accessdate = 2011-04-25 | archive-date = 2011-04-27 | archive-url = https://web.archive.org/web/20110427085613/http://twotribes.com/message/what-we-did-for-the-portal-2-arg/ | dead-url = no }}</ref>。