/usr/include/libkdegamesprivate/kgame/ is in libkdegames-dev 4:14.12.3-2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/libkdegamesprivate/kgame/kgame.h
/usr/include/libkdegamesprivate/kgame/kgamechat.h
/usr/include/libkdegamesprivate/kgame/kgameerror.h
/usr/include/libkdegamesprivate/kgame/kgameio.h
/usr/include/libkdegamesprivate/kgame/kgamemessage.h
/usr/include/libkdegamesprivate/kgame/kgamenetwork.h
/usr/include/libkdegamesprivate/kgame/kgameproperty.h
/usr/include/libkdegamesprivate/kgame/kgamepropertyhandler.h
/usr/include/libkdegamesprivate/kgame/kgamesequence.h
/usr/include/libkdegamesprivate/kgame/kgameversion.h
/usr/include/libkdegamesprivate/kgame/kmessageclient.h
/usr/include/libkdegamesprivate/kgame/kmessageio.h
/usr/include/libkdegamesprivate/kgame/kmessageserver.h
/usr/include/libkdegamesprivate/kgame/kplayer.h