March 3, 2010 Patch (Portal)

{{Patch layout
 * game = portal
 * source      = http://store.steampowered.com/news/3547/
 * source-title = Portal Update Released
 * before      = March 1, 2010 Patch (Portal)
 * after       = May 13, 2010 Patch (Portal)
 * notes       =

Portal
}}
 * Added valuable asset retrieval