Shattered Pixel Dungeon
A Roguelike RPG, with randomly generated levels, items, enemies, and traps! Based on the source code of Pixel Dungeon, by Watabou.
Shattered Pixel Dungeon uses gradle and is most easily compiled/edited using Android Studio.
Shattered Pixel Dungeon on Google Play: https://play.google.com/store/apps/details?id=com.shatteredpixel.shatteredpixeldungeon
On Amazon: https://www.amazon.com/Shattered-Pixel-Dungeon/dp/B00OH2C21M
On F-Droid (Which compiles directly from this source code): https://f-droid.org/repository/browse/?fdid=com.shatteredpixel.shatteredpixeldungeon
Official web-site: http://www.shatteredpixel.com
Developer's blog: http://shatteredpixel.tumblr.com/
Source code of original Pixel Dungeon: https://github.com/watabou/pixel-dungeon