What are the 'best' XNA developed games for PC?

I've had a quick google, but can't find anything obvious that answers the question. What are the best games de开发者_如何学JAVAveloped using XNA for PC? Any flagship games, original games.. etc?

Obviously 'best' is pretty subjective, but I'm sure they'll be a common consensus on some of the good ones.

(I don't own an XBox (if that matters...))

Microsoft holds an annual Dream-Build-Play contest. The 2009 winner, Dust: An Elysian Tail (trailer) was pretty impressive!