Choose-your-own-adventure type stories evolved into the excellent Fighting Fantasy book series, and 'The Way of the Tiger' gamebook series, but Diceman took it to the stratosphere, and stands as one of the best things under the 2000ad banner.
Playing as Torquemada running around in a Bosch painting, or selecting your Blitzspear speed in the Torture Tube, each story has an allround fun feel about it.
Highly recommended.