Batman Arkham City Official Map App
from Dorling Kindersley, originally released 21st October, 2011
Please note: This is the official reference app to Batman: Arkham City, not the game itself.
“I just love being able to relegate task manager-type duties to a separate device... Also, this is totally Batman. Dude would use this if he could.” - TouchArcade
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discussion by Sidelines.