Descent II
Ok, so you have your Mac OS 9 machine up and running, now what? Why not fire up some games?
There are a lot of great game you can play including Diablo II, Myth II, Sim City 2000, Warcraft, Warcraft II and many more. Maybe you only have a few of these discs or maybe you don't have any, no need to worry. There's a great website that has a ton of great "abandon-ware" titles for you to choose from! Macintosh Garden .
As the site states, The Macintosh Garden is an abandonware games archive, dedicated in particular to supporting the Macintosh computer platform. This site is awesome, it has everything from Monkey Island to The Oregon Trail. There's a lot to be said about these old games and they are definitely worth revisiting. Many of the games are available in both the original format and for emulation with either SheepShaver or Basilisk II.