additions, external link updates

entries/gloomy_dungeons_2.md

@@ -0,0 +1,15 @@
+# Gloomy Dungeons 2
+
+- Home: https://mobile.zame-dev.org/gloomy-ii/
+- Inspiration: Doom, Wolfenstein
+- State: mature
+- Download: https://f-droid.org//packages/org.zamedev.gloomydungeons2.opensource/
+- Platform: Android
+- Keyword: action, 3D, shooter
+- Code repository: https://github.com/restorer/gloomy-dungeons-2.git
+- Code language: Java
+- Code license: MIT
+
+## Building
+
+- Build system: Gradle