The 72-year-old lore of the Batman universe is about as immutable as comic book icons come. If Batman: Arkham Asylum was evidence of Rocksteady's comprehension of the franchise, then Arkham City is proof of their understanding of its quiescence.

The chiropteran hero hasn't introduced many substantial changes to his modus operandi since his last, incredibly well-received video game outing. The world's greatest detective still spends a fraction of a fraction of his time doing actual detective work, and a vast majority of his time alternating between brutalizing and terrorizing different factions of armed and unarmed goons. Sure, he's got a few new gadgets this time around, but the methods remain the same.

What's changed in Rocksteady's second stab at the timeless DC franchise is the world that surrounds Batman -- the titular prison colony Arkham City. Conceived by the foolhardy, the prisoner-run district may not be the largest open world ever explored in a game, but with an ecosystem of sidequests, challenges and secrets that blanket every square inch of the region, it might just be the densest.