Name a female celebrity, and chances are there are red-carpet photos of her hair in a braid. Spotted recently: Miley Cyrus with a skinny side braid. Blake Lively with a messy French fishtail braid.

Braid is the latest in a new movement towards innovation on Xbox Live Arcade. If you have longed for a time when arcade shooters and Vision Cam versions of strip Hold 'em weren't the only offerings on ...