October 7, 2011 Patch

{{Patch layout
 * source = http://store.steampowered.com/news/6455/
 * source-title = Portal 2 Update Released


 * before = October 4, 2011 Patch
 * after = N/A


 * notes =

Portal 2

 * Fixed exploits where cheats could go undetected in Challenge Mode
 * Modifying gravity is now marked as a cheat
 * Fixed crosshair not showing on extra wide resolutions
 * Fixed rare case where a phantom laser would be stuck emitting from a redirection cube
 * Peer Review localization updates from the community

Undocumented Changes

 * Fixed bug which made Chapter 5 impossible to complete.

}}