What is the Portal 2 Release Date?

Portal 2 has a scheduled release date of 2011. It is likely that this release will either occur earlier in the year around the May timeframe, or later in the year, around the holiday timeframe, as these are the two most popular release windows for high-profile games. Given Valve's track record, of course, it is entirely possible that it will be delayed. Rumors suggest it may be available standalone or as part of a bundle such as The Orange Box.