Edmund McMillen has spilled the beans to VG24/7 on the retail edition of The Binding of Isaac. Unfortunately it will not come with the "Wrath of the Lamb" Expansion, as the retail edition is being printed right now and the expansion isn't ready yet. Called the "Unholy Edition", the boxed version will come with a DRM free version of the game, a Steam gift key, poster, full soundtrack, a 40 page art book and in his own words (which are true), "sweet packaging."

The retail version will be released on March 16th through Merge Games and unfortunately will not be released in America. So I guess I'll be ordering mine online.