Added Shattered Pixel Dungeon and Mindustry.

README.md

@@ -300,6 +300,7 @@ A selection of major game studios, publishers, etc. using GitHub:
 - [Freeablo](https://github.com/wheybags/freeablo) - Open-source implementation of the Diablo I engine.
 - [NetHack](https://github.com/NetHack/NetHack) - Single-player roguelike dungeon exploration game and one of the most popular games in its genre.
 - [OpenMW](https://github.com/OpenMW/openmw) - Reimplementation of the Morrowind game engine.
+- [Shattered Pixel Dungeon](https://shatteredpixel.com/shatteredpd/) - An open source game based on the source code of Pixel Dungeon by Watabou.
 - [The Legend of Zelda: Mystery of Solarus DX](https://github.com/christopho/zsdx) - Sequel to The Legend of Zelda: A Link to the Past released on the SNES.
 - [Valyria Tear](https://github.com/Bertram25/ValyriaTear) - Single-player medieval-fantasy 2D J-RPG.
 
@@ -371,6 +372,7 @@ A selection of major game studios, publishers, etc. using GitHub:
 - [KaM Remake](https://github.com/Kromster80/kam_remake) - RTS game remake of “Knights and Merchants”  written in Delphi from scratch.
 - [KeeperRL](https://github.com/miki151/keeperrl) - Roguelike dungeon builder inspired by Dwarf Fortress.
 - [Last Colony](https://github.com/adityaravishankar/last-colony) - RTS game with both a single player campaign mode as well as a multiplayer mode, created entirely in HTML5 and JavaScript.
+- [Mindustry](https://mindustrygame.github.io/) - An open source sandbox tower-defense game
 - [MegaGlest](https://github.com/MegaGlest/megaglest-source) - MegaGlest real-time strategy game engine (cross-platform, 3-d).
 - [Micropolis](https://github.com/SimHacker/micropolis) - City-building game based on the original code for SimCity.
 - [Openage](https://github.com/SFTtech/openage) - Clone of the Age of Empires II engine.