Batman Arkham City - Batman Inc. suit and Batcave challenge map torrent

These are the missing files that are causing everyone's errors when trying to view trophies or play Riddler Challenges.

It does not require any specific release. It's possible that you may have to have the Iceberg Lounge and Joker's Carnival Challenge maps downloaded as well. (Every DLC pack has these already.)

Just extract all the files to "...\Batman Arkham City\", THEN install the Harley Quinn DLC.