At the time, the Lithtech engine proved to be quite formidable and was licensed for use in numerous products by other companies as well as Monolith products themselves. The engine has been upgraded and improved over the last couple of years, and Sanity is the latest result. The engine has changed dramatically and is used to detail a third-person game played from an isometric perspective. The power of the mind has been unleashed by the workings of Dr. Joan Aiken. Her work has uncovered a relic that she has used to create a serum that unlocks humanity's mental potential.
Psionic powers are available to people, potentially at the cost of their sanity.
The DNPC, or Department of National Psionic Control, is a police force that maintains peace against any psionic threat. The DNPC has those with the power on staff, and faces off against those who use their power for less than peaceful purposes. You play as Agent Cain, one of the first to have possessed the psionic power. At one time, Cain lost control and massacred a number of innocent bystanders with his power, and you take on the role of Cain as he is called back into duty. To make sure an incident like that never happens again, Cain has had a chip installed that will shut down his mind if he goes out of control again.