You've heard of Batman no doubt, but if you don't read comics, it's conceivable that you might be unfamiliar with Arkham Asylum. The iconic psychiatric hospital is essentially Gotham City's Alcatraz, and it has housed just about every villain Batman has ever tangled with at one time or another.
Story mode really sucks you in; Uncomplicated combat is fast-paced and looks fantastic; Tons of cool stuff to unlock; including Challenge mode maps; Audio and visual presentation is uniformly impressive; You won't want to stop playing even after you've solved all 240 riddles
Too tempting to play through the entire game in detective vision mode; Supervillains that you don't get to fight feel like missed opportunities