October 30, 2007 Patch (Portal)

{{Patch layout
 * game = portal
 * source      = http://store.steampowered.com/news/1277/
 * source-title = Portal Update Released
 * before      = N/A
 * after       = November 27, 2007 Patch (Portal)
 * notes       =

Portal
}}
 * Optimized Portal demos to have fewer issues when going through actual Portals