descriptions of entries checked and either incorporated to keywords and inspirations or redundancies removed

entries/megamek.md

@@ -2,13 +2,12 @@
 
 - Home: https://www.megamek.org/, https://sourceforge.net/projects/megamek/
 - Media: https://en.wikipedia.org/wiki/MegaMek
+- Inspiration: BattleTech
 - State: mature
 - Download: https://megamek.org/downloads
-- Keyword: strategy
+- Keyword: strategy, mech
 - Code repository: https://github.com/MegaMek/megamek.git, https://git.code.sf.net/p/megamek/git
 - Code language: Java
 - Code license: GPL-2.0
 
-Unofficial, online version of the Classic BattleTech board game.
-
 ## Building