Shattered Pixel Dungeon is a fork of Pixel Dungeon. I've never played the original but I've heard the programmer of Shattered Pixel Dungeon has worked on game balance. The game seems pretty good as a simple roguelike. I'm still learning some of the UI. It seems weird to run an open source project but refuse pull requests but I suppose if the programmer wants to manage everything himself he can.
As I'm sure people will know by know part of my interest is that the game has badges. I've created a quick and dirty java integration for gamerzilla. It needs the gamerzilla json and images to be outside of the jar file. I plan to fix that but wanted to get something up and running.
Shattered Pixel Dungeon with Gamerzilla support