Tetris is built into your Mac - Time Waster
Here are the steps to get the game going:
- Open Terminal, which you can find in the Utilities sub-folder in your Applications folder
- In the Terminal window, type "emacs", then press Enter
- Wait for the Emacs screen to load (you'll see a bunch of welcome information for GNU Emacs)
- Press the Escape key, then type "x" then type "tetrix" (no space between "x" and "tetris") and press Enter
Yes, this game of tetris isn't the best implementation you will find. It's very narrow, making it quite frustrating to play. But hey - it's free Tetris, and it's built in to your Mac!