Sol Trigger is a role-playing game for the PlayStation Portable set in the dystopian city of Kaiserhald, under the control of the Machine Church. This organization harnesses a powerful energy source called Sol, derived from humans. Players join La Résistance, a group aiming to thwart the Church's exploitation and prevent the development of a sinister new technology that threatens the populace.
Sol Trigger is the La Résistance to the Machine Church which rules the dystopian city of Kaiserhald. The Machine Church is using a miraculous energy source known as "Sol" to raise the city to even greater heights, but Sol Trigger know that Sol is secretly made from people, and that the Church intends to ramp up their production with a new form of twisted technology.