To Samarkand was created with Inform and has IFID 354032E3-359A-4438-9D7E-581AE9769D9A. To play a work like this one, you need an interpreter program: many are available, among them Gargoyle
for Mac OS X or Windows; Windows Frotz or Windows Glulxe for Windows.
Or you can play without downloading anything by following the 'Play In-Browser'
on your web browser.