Before, I've written long list of actions that you can do when you got bored, extremely bored : When Mac Users Get Bored. I know you have tried some, but did you wonder what is Big Bang Board Games mentioned in the list?
Big Bang Games are released by Freeverse. They have released two kinds of Big Bang Games. One is Big Bang Board Games and the other is Big Bang Brain Games.
Unlike what people think of and write of, Terminal game isn't the correct term to be used; Instead, emacs game is the correct term.
Emacs version 22.1 first supports Mac OS X on June 2, 2007. The complete story of emacs can be read from wikipedia: GNU Emacs, if you're interested.