So, the Shaun Southern MFM format that Gremlin uses can be nibble copied.
What Mayhem have done is remove the track check at the start of the game, they've not touched the MFM part, knowing that it can be nibble copied, but the track protection couldn't.
They had barely enough room for their cracktro.
Bit of an odd way of doing it considering the way the MFM format of this game is very easy to either dumb read the disks and write them back out again, or simply to crack it to files.
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