moved the entries up one folder, added the folder to the keywords

games/star_ruler_2.md

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+# Star Ruler 2
+
+_4X/RTS set in space._
+
+- Home: http://starruler2.com/
+- State: mature
+- Keywords: strategy, RTS
+- Code repository: https://github.com/BlindMindStudios/StarRuler2-Source.git
+- Code language: C, C++
+- Code license: MIT
+- Assets license: CC-BY-NC 2.0
+
+Music is not part of the open source release.
+
+## Building
+
+