Bored out of your mind on an airplane with no internet and a company laptop with no games installed? How about playing a crappy low resolution version of Tetris!
Here’s how…
Step 1: Open Terminal.app (/Applications/Utilities)
Step 2: Type emacs, hit Enter. After it loads, press the Esc key, then X on your keyboard.
Step 3: Enter tetris (lower-case) and hit Enter.
Bingo! Your very own copy of Tetris running in Terminal, use the arrows keys to control/rotate the blocks.