Congrats!
I recently dived back into Arkham but couldn’t muster the will to tackle all the challenge maps again. Great game though! :)

Ha! 1 year? Amatuer! Took me five years from when I started playing to when I finally beat it.
Seriously though, congrats! It’s a good one to add to your beaten list, as I think it has such a great balance between skill, grind and exploration based achievements, so by the time you get that last achievement, it’s clear you have mastered the game.