Now, let's see you get out of the city of Alzan - a place full of thieves and cut-throats, surrounded by very high walls, and built on top of the sea cliffs.
It's an interesting adventure in that there is no treasure to be found. The only goal is to get out of town.
The title was first published by Trevor Toms in The ZX81 Pocket Book, intended to demonstrate his then brand-new authoring system.
The same system was subsequently used for at least some of the games from Phipps Associates.
The original game was ported to OPL and the Psion II by Jim Mahaffey, and the C64 by Wane Murray.
Also available in German.
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Useless piece of trivia: The game engine used by Phipps Associates for Magic Mountain, Pharaoh's Tomb, etc. seems to be based on the one from this game.
I'd hardly call that useless :)
There's no "seems" about it. Trevor Toms worked for Phipps Associates, the book from which it comes was published by them in the UK, and crucially, if you break into the ZX81 versions of the programs, you can list them and print the variables and they agree exactly with the method explained in the book.
By the way, the program unPhipps - available on the IF Archive - will "decompile" (wrong term for this system, really) both Alzan and the Phipps games.