Late summer blockbuster Batman: Arkham Asylum receives another dose of free DLC with the "Prey in the Darkness" map pack tomorrow on Xbox 360 and PS3. The "Heart of Darkness" map will have Bats battling baddies at the Arkham Pumping Station, while "Hothouse Prey" has the detective using his predator skills to silently dispose of henchmen in the conservatory (i.e., the Abandoned Glasshouse). Remember to pick up the free "Insane Night" map pack if you somehow missed it last night ... oh yeah, and don't forget to check out the game if you've somehow missed out on that, too.