new entries and cleanup

rpg/trinity_reign.md

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+# Trinity Reign
+
+_Cross-platform, open source 3D IMOW (Immersive Multiplayer Online World)._
+
+- Home: <https://web.archive.org/web/20131209073248/http://trinity-reign.com/> https://sourceforge.net/projects/ura-game/
+- State: beta, inactive since 2013
+- Code: https://sourceforge.net/p/ura-game/code/HEAD/tree/ (svn)
+- Language(s): C++
+- License: GPL-3.0
+
+## Building
+
+Uses CMake