gnubg

Name: Gnu Backgammon

http://gnubg.org/

/api/cask/gnubg.json (JSON API)

Cask code on GitHub

Current version: 1.04.000,1010

Requires: X11

gnubg only works if called from /Applications, so you may need to install it with
    brew cask install gnubg --appdir=/Applications
Fork me on GitHub