Found this interesting article about how Minecraft teaches kids reading.  It is not that the game directly teaches them reading, but that children are so motivated to play and learn the game that they do their own research and reading to find out more about it.

http://www.wired.com/2014/10/video-game-literacy/

The above article is based on research by Hannah Gerber: http://shsu.academia.edu/HannahGerber