/* beginning of ethnic stereotypes */

"You know what the fellow said – in Italy, for thirty years under the
Borgias, they had warfare, terror, murder and bloodshed, but they
produced Michelangelo, Leonardo da Vinci and the Renaissance.
In Switzerland, they had brotherly love, they had five hundred years
of democracy and peace – and what did that produce? The cuckoo clock."

- Orson Welles

This Swiss family has neither cuckoo clock nor chocolate.
At least they have a cow and the cheese...

/* end of ethnic stereotypes */

Download the .nib image from:
https://archive.org/download/Uncracked4am

The disk has both no standard address and data epilogues , so we need a
patched DOS 3.3 to get a copy.

Boot the copy: we can chose 'G' to play game or 'D' for the demo,
quite obviously if you chose 'G' the disk reboot.

Search for $4C $00 $C6 - JMP $C600

It's found in two places:

track $12 sector $02 byte $B4

       ...
0BAE   BIT $C054
0BB1   BIT $C051
0BB4   JMP $C600

Uhm, no - switch to text mode and reboot, this code is executed when
you hit a key in the demo. Let's go on:

track $10 sector $0C byte $98

       ...
BE7A   BCS $BE98
       ...
BE98   JMP $C600

This looks suspicious: check carry flag and if is the case reboot.
Put a couple of $EA - NOP in place of BCS $BE98

Less than 30' to deprotect and a weekend spent following an inaccurate
walkthrough made for the C64 version.

I hate adventure games!