The 1992 game was able to use the wolfenstein name because the trademark had lapsed the the original company had gone backrupt. While the 1992 game was originally intented to include stealth gameplay, none of those gameplay features from the 1981 game really made it into the final version of the 1992 game.
Key here is that M.U.S.E. sold no rights to id software, did not bless the 1992 game in any way, and there were no personel in common between the two games. They can't really be considered as part of the same franchise
https://www.google.com/books/edition/The_Making_of_Prince_of...
After a while, you found a machine and when you finally assemble everything and start it....the game stop working and loop in a "we're tired of hacking" message ! Of course, with the cracked version.
And it was clever, because
1) you tried the game and enjoyed it. And now you're frustrated and want to play it, so you might actually buy it
2) the anticopy test was late in the game, so everyone who copied it thought the copy was ok and spreaded it.
A sort of shareware.