Using The Terminal Command and Emacs To Play The Video Game "Tetris"? OS X via the Terminal command and Emacs apparently allows you to access and play a version of the video game Tetris.

How do you accomplish this (and can you play via keyboard controls) ?
To start emacs just type emacs↩
This tells the shell to look for an executable file emacs in a directory listed in the PATH environment variable.

When in emacs run the command tetris that is escxtetris 

The controls are the arrow keys

Note that something seems to be wrong with the score file e.g. it won't save high scores etc.