Breakdown is unique in that it is technically categorized as a first-person shooter, but integrates the experiences of a fighting game into the experience as well as using auto-lock-on for shooting enemies. The viewpoint never leaves the perspective of the player, and interaction with objects, reloading of guns, and the impact of hitting the floor are all seen through this first-person perspective. Unlike other first-person shooters, interaction with objects is also all done in a realistic manner in Breakdown; ammunition is picked up by looking down and grabbing it with your arm instead of walking over it, similarly doors are opened by grabbing the handle, key cards used by swiping them over a scanner, ladders by using the arms for climbing and many others. Health and energy are replenished by consuming energy bars, sodas and hamburgers, which the player must eat while remaining in first person.
Source: Wikipedia, "http://en.wikipedia.org/wiki/Breakdown_(video_game)," available under the CC-BY-SA License.