Totally Insane is a combat challenge map in Batman: Arkham Asylum. The challenge consists of an unlimited amount of enemies, which range from regular Blackgate prisoners to lunatics. It was originally part of the free Insane Night DLC, and is now part of the GOTY edition.
Due to it being marked as Extra content, only Batman can be used on this challenge.
There are no medals, with the only objective being racking up points while surviving as long as possible.