6) “An ancient order, lust for power consumed, their patron saint is here entombed.”
Find the proper tombstone in the cemetery with the large central statues.
7) “This tumbledown ruin’s not looking its best, what do you expect from the Penguin’s old nest?”
In the Otisburg section of Founders Island you will come across Cobblepot Manor (the former home of our beloved Penguin). Scan it for your solution.
8) “This cold corporation changed his life forever, curing his wife now a chronic endeavour.”
Scan the Goth Corp building.
9) “Far away the deflated brute roams, leaving behind what he couldn’t ship home.”
Glide (or drive) over to Port Adams then begin to examine the group of large containers in the lower-left part of this area. Within one of these containers you will come across an open crate that you need to scan to solve the riddle.
10) “Crusaders of old had a trusty steed. How much horsepower does a Dark Knight need?”
If this wasn’t an obvious hint to the Batmobile, I don’t know what is.
There you have it, all of Mr. Nigma’s riddles tied up in a neat little bow for you. Listen as he grows enraged at your superior intellect. The world of Batman: Arkham Knight is now a less confusing place.