According to the developer shatter has sold very well on PSN selling 30k its first week and a half, also they commented on the possibility of it going multiplatform (PC/XBLA) and that the multiplatform versions are nearly finished.
Also for more numbers, according to PSN's top selling games, FF VII, COD wAw map pack 1, Battle field 1943, Call of duty WaW map pack2, and Fat princess are all ahead of Shatter which means that all those game sold over 30K the past week. Just a nice little estimation using common sense.












