Goldfields (Mac OS Classic)

Goldfields
Developer: Jacaranda Software Publisher: Jacaranda Software Platform: Mac OS Classic Released in AU: 1990 This game has a hidden developer message.

Goldfields allowed a generation of Australian schoolkids to play at being grizzled 19th century prospectors.

Copyright Notice (v2.1)

This HyperCard game blocks the Command and Option keys as a childproofing method, but its defenses aren't seamless.

1. Click on About this stack... and you have a moment in which to hit ⌘M and bring up the message box.
2. Use the commands show menubar and set userlevel to 5 to unlock everything else.

Now you can choose Stack Info... from the Objects menu and look at the stack script, which begins with a comment:

-- GOLDFIELDS © Trevor Jacob 1986
-- HyperCard version published 1990 by Jacaranda Software
-- PO Box 1226, Milton, Queensland 4064, Australia
-- IMPORTANT: This stack is copyright.
-- Jacaranda Wiley Ltd will not hesitate to prosecute any person or
-- institution possessing an illegal or modified copy of this stack.
-- Version date: 25 July 1991

Yes, they will absolutely prosecute anyone who modifies a copy of this stack. If they can find a lawyer not swamped with cases against people who allegedly cut off a mattress tag.