A sequel to I.Q. was released as I.Q Final for Japan in 1998 and Kurushi Final: Mental Blocks for Europe in 1999. The gameplay is similar to the first game, but there are several differences in terms of design, and new challenges are added such as 100 Attack, Survival Mode, and Create. In this game, the new default character is Abel. Unlike the first game, there are different unlockable characters, including the original characters from I.Q.: Intelligent Qube. New unlockables include Kimti (a cave man), April (a nurse), Morgan (a military man), Dickson (a basketball player), and Atlas (a polar bear).