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

entries/grail.md

@@ -3,14 +3,12 @@
 - Home: http://leetless.de/tag-Grail.html
 - State: beta, inactive since 2013
 - Platform: Linux
-- Keyword: adventure, game engine, 2D
+- Keyword: adventure, game engine, 2D, point & click
 - Code repository: https://github.com/Droggelbecher/Grail.git
 - Code language: C++, Lua
 - Code license: GPL-3.0
 - Code dependency: SDL
 
-2D Point-and-click adventure game engine.
-
 ## Building
 
 - Build system: CMake