Chris Crawford wrote in his On Game Design about a trick like this, that he implemented in Patton Strikes Back. Plus some other tricks. He claims that he never found a cracked version that had fixed the secondary checks. The result was a crash just before winning the game.
This looks like an older version of the same text that he later edited into a chapter of the book (does not have the claim about only finding failed cracks):
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Chris Crawford wrote in his On Game Design about a trick like this, that he implemented in Patton Strikes Back. Plus some other tricks. He claims that he never found a cracked version that had fixed the secondary checks. The result was a crash just before winning the game.
This looks like an older version of the same text that he later edited into a chapter of the book (does not have the claim about only finding failed cracks):
https://www.erasmatazz.com/library/the-journal-of-computer/j...
Apple ][ games like Ultima were famous for crashing 20 hours in if you didn't crack the hidden checks.