Extreme

Extreme is a difficulty in KET that is represented with the color Light blue. This difficulty level is the 2nd difficulty level that falls into the soul-crushing category. Obstacles in towers of this difficulty are harder than those in Insane. This difficulty used to be combined with Insane and Terrifying to form Fatal difficulty.

For most players, this is considered the hardest possible difficulty as far as human obbyists go at the moment.