August 30, 2011 Patch

{{Patch layout
 * source = http://store.steampowered.com/news/6174/
 * source-title = Portal 2 Update Released


 * before = July 7, 2011 Patch
 * after = September 12, 2011 Patch


 * notes =

Portal 2
}}
 * Preparations for launch of Portal 2 updates this September