When my ship reached Syrinx, I saw the twin moons, By-Tor and Snow Dog, that orbited the planet. Their names were taken from another classic Rush song. And down below, on the planet’s bleak gray surface, there were exactly 1,024 copies of Megadon, the domed city described in the liner notes. That was twice the number of Zork instances there’d been on Frobozz, so I knew the Sixers couldn’t barricade them all.