So on the Niemand Tapes there's mention of the fact that Megatropolis is a rare example of doing an 'Elseworlds' Dredd strip. There was that one Dredd 'Alternity' Mega Special which is mainly memorable for Simon Jacob doing Dredd as a medieval knight on horseback (and Barnes 'n Hairsine on Dredd of Drokk Green is kinda fun). You can read these in the Restrcited Files 4, should you be intrigued.
But my memory is that right around the time the Megazine got going, there was something of a glut of strips that more or less took the idea of 'the best (and least corrupt) Cop in town' and plonked it down in a variety of settings, to varying degrees of success...
Dredd in Brit-Cit: Armitage
Dredd in Cal-Hab: MacBrayne
Dredd in Hondo City: Shimura/Inaba
Dredd in the Afterlife at the end times: Canon Fodder
Dredd as a sheep in Vegan Europe: Inspector Raam
Dredd in Eco-Hell New York: Trashman Trask
For my money, it's Trashman Trask who is the most Dreddlike, and I'm surely doing a disservice to the creators involved. But the way these characters were advertised, on the other hand...
Any more for any more?