Batman: Arkham Asylum Joker DLC will be free

What's with the goofy grin? Did you dip into the jar of Smilex, or are you just giddy that playing as the Joker in Batman: Arkham Asylum won't cost you a dime?

Eidos has confirmed that the PS3-exclusive DLC will be free, allowing players to frolic about in the game's challenge maps as the Clown Prince of Crime when Batman: Arkham Asylum swoops onto store shelves this August.