Part of Level 5's Guild 01 project (a collection of smaller games), Suda 51's Liberation Maiden was a strange little 3D shooter for the Nintendo 3DS. It didn't do anything particularly great, but you could do a lot worse as far as downloadable titles are concerned.
Apparently people really seemed to like it, as Liberation Maiden SIN is headed to the Playstation 3. What exactly is SIN? Well, it's a visual novel developed by 5pb.