Among some of the PlayStation's first-party exclusives, Guerrilla Games' Killzone andResistance byInsomniac Games were two of the most memorable series to hit Sony's consoles. During their time, both IPs were major selling points for the PlayStation, being largely well-received and reviewed with successful sales numbers. They also represented evolutionary steps for first-person shooters in their respective generations, with an increasing focus on impressive graphics and cinematic presentation on top of the tight action; elements that have since become expected staples of AAA FPS titles.