I have a collection of games and entertainment software for pre-Intel Mac computers.  It's all  PowerPC based, so it won't work on Macs with Intel chips.  But if you have an older Mac (before August 2006), it's great stuff---I'm really sorry I can't play it any more!
The software is:
Riven: The sequel to Myst
Zork: Grand Inquisitor
VOYAGER CD-ROMS
	Stravinsky: The Rite Of Spring 
	Poetry In Motion  (Voyager CD-ROM)
	Shining Flower (Voyager CD-ROM)
	Cinema Volta (Voyager CD-ROM)
	Ephemeral Films (Voyager CD-ROM)
	If Monks Had Macs (Voyager CD-ROM)
	First Person: Marvin Minsky (Voyager CD-ROM)
	Laurie Anderson's Puppet Motel (Voyager CD-ROM)
UNBOXED GAMES
	The Space Bar
	Myth , Myth II, and Myth III
	Driver
	Unreal
	Medal of Honor Allied Assault
	Unreal Tournament
	Oni
	…and a bunch more that I don't feel like typing out…
                                       
I also have a few PC games, including Thief, Thief II, and System Shock 2, which I'd be happy to throw in