When the inmates take over Arkham Asylum, it's going to take more than Batman to save the day...

And you're going to need more than a year to sort things out -- you'll need at least 16 months.

This glorious calendar features 16 images of  your favorite heroes and villains from the hit Batman Arkham video game series.

Spend 30 days (or less) alongside Batman, Robin, Batgirl and Nightwing as they look to keep the streets safe from The Joker, Harley Quinn, Penguin, Mr. Freeze, Riddler, Two-Face and Poison Ivy.

Yes, Catwoman's there, but her allegiance is currently undetermined.

The Batman Arkham 16-Month 2018 Calendar is a must for any fan of the Arkham series who has a 16-month timetable for liberating Gotham City from its colorful malcontents.