Jessica, Jacob & the Big Unfriendly Monster is a 3D game that combines 3rd person platform with 1st person drive-through levels. You play the roles of both Jessica and Jacob in an attempt to defeat the BUM (Big Unfriendly Monster) through a set of levels, solving the series of puzzles, using various magic potions to stay undetected and navigating the steam vehicles in order to escape your prosecutors. J, J & BUM is a mind-riddling game with lots of puzzle-based chapters and dynamic drive-through levels that will force you to use both your logic and your reflexes. The main gameplay goal is to use simultaneously different abilities of Jessica and Jacob in order to get through the level, depending only on scattered potions and hidden keys, trying not to be detected by the level guards and archaic monsters that lurk behind dark corners.