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

games/atlantis.md

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+# Atlantis
+
+_PBEM Game engine which is used to create many different strategy wargames today and for the past decade._
+
+- Home: http://www.prankster.com/project/, https://sourceforge.net/projects/atlantis/, https://web.archive.org/web/20140516211231/http://www.atlantis-pbem.org/
+- Media: https://en.wikipedia.org/wiki/Atlantis_PbeM
+- State: mature, inactive since 2016
+- Download: https://sourceforge.net/projects/atlantis/files/Atlantis%204/Release%204.1.0/
+- Keywords: framework
+- Code repository: https://github.com/Atlantis-PBEM/Atlantis.git, https://svn.code.sf.net/p/atlantis/code/ (svn)
+- Code language: C++
+- Code license: GPL-2.0
+
+Game engine? Implementations?
+
+See also:
+ [Atlantis Little Helper](https://sourceforge.net/projects/alh/), [Dev group](https://groups.yahoo.com/group/atlantisdev/), [Atlantis 1.0](https://github.com/ennorehling/atlantis).
+
+https://github.com/essenbee/atlantis, https://github.com/AtlaClient/AtlaClient
+
+## Building
+