imports from libregamewiki

entries/battle_tanks.md

@@ -6,13 +6,13 @@ _Fast 2D tank arcade game with multiplayer and split-screen modes._
 - State: mature, inactive since 2009
 - Download: https://sourceforge.net/projects/btanks/files/
 - Platform: Windows, Linux, macOS
-- Keywords: action, arcade
+- Keywords: action, arcade, commercial content
 - Code repository: https://github.com/whoozle/btanks.git, https://svn.code.sf.net/p/btanks/code/ (svn)
 - Code language: C++
 - Code license: GPL-2.0
 - Assets license: Proprietary
 
-Only sources are GPL?
+Only sources are GPL.
 
 ## Building