What is “nethack” Package?

Single-player roguelike video game
For more details: http://www.nethack.org/

Installation

• Open Terminal by pressing command+space then type terminal and hit Enter key.
• Install homebrew first.

  ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" < /dev/null 2> /dev/null

• Install nethack.

  brew install nethack

Now, use nethack!