Around three days ago, Eidos got around to confirming -- and detailing -- that whole “free Batman: Arkham Asylum” thing we kept talking about on Destructoid. Now that downloadable content has arrived. Earlier on the 17th, the post-release content was released across the two console downloadable services, Xbox LIVE Marketplace and the PlayStation Store as well as Games for Windows LIVE. (People are having trouble downloading it from the latter.)

Dubbed the “Insane Night Map Pack,” and carrying a price tag of “free,” the content adds two Challenge Mode maps to the core game. One of the new maps is “Admin Secure Records Facility,” a FreeFlow combat arena. The other is the “Arkham Prison Watchtowers,” which is a map you can get your “Nocturnal Predator” on.

Have you guys tried this thing out yet? Tell us what you think about it.