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

games/nxtank.md

@@ -0,0 +1,16 @@
+# nXtank
+
+_Xtank in a modern gaming engine._
+
+- Home: http://nxtank.sourceforge.net/, https://sourceforge.net/projects/nxtank/
+- State: beta, inactive since 2010
+- Download: https://sourceforge.net/projects/nxtank/files/
+- Platform: Windows
+- Keywords: action, tank
+- Code repository: https://svn.code.sf.net/p/nxtank/code/ (svn)
+- Code language: Python
+- Code license: GPL-3.0
+- Code dependencies: Ogre
+
+## Building
+