Port Overdosed: Both Zork and Enchanter have appeared on practically every computer platform ever made.
The fact that many Zork games can be played in OpenFrotz, an Infocom game interpreter, means that those it had not been ported to directly can still play it on any system that can compile OpenFrotz. The engine can be ran straight from a terminal, too.
Zork is so port overdosed you can actually play the game inside another game. There's a trick you can use to wander around the main menu of Call of Duty: Black Ops, where you'll find a computer console that, in addition to copious in-universe emails and government files, contains the entirety of Zork.