imports from osgameclones, added backlog and rejected lists, started libregamewiki synchronization

games/enigma_development_environment.md

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+# ENIGMA (development environment)
+
+_ENIGMA is a free development environment geared towards game development._
+
+- Home: https://enigma-dev.org/
+- Media: https://en.wikipedia.org/wiki/Enigma_Engine
+- State: mature
+- Download: https://enigma-dev.org/download.htm
+- Keywords: framework, 3D
+- Code repository: https://github.com/enigma-dev/enigma-dev.git
+- Code language: C++, C
+- Code license: GPL-3.0
+
+## Building
+
+- Build instructions: https://enigma-dev.org/docs/Wiki/Install:Windows
+