You unravel clues behind a conspiracy of epic proportions in an environment that breathes a comic book ambiance. Footsteps and shots are visualized in text and actions such as head shots are shown in a series of still images. Aside from that XIII has all the typical FPS elements: both stealth and action more than 15 weapons (shotguns crossbows rifles ...) interaction with environmental objects and a whole load of baddies in levels all over the world. During the game you can learn a number of skills such as silent walking lockpicking and dual weapons handling.