Innocent Rage, like the previous PS2 Spectral Force titles, takes place in fantasy world of Neverland, detailing the First Neverland War. You play as a young soldier in a mercenary group that's not affiliated with any particular government, instead opting to take on jobs from any of the 10 countries that divide Neverland. The game presents the Neverland story from a new perspective. Playing as this young mercenary, you get to make decisions about which jobs you'd like to undertake. Based on your performance, you can actually effect the power of the country that hired you. Eventually, you'll earn a name for your prowess as a mercenary and will be entrusted with more advanced missions, such as raiding a castle. Gameplay resembles the simulation-based gameplay of Spectral Force Chronicle, with three levels of attack strength and combination attack moves.