http://retro.ign.com/articles/815/815011p1.html
Oh and I would just like to point out this paragraph on the third page.
Nintendo insisted Prime wasn't a shooter. Rather, it was a First-Person Adventure that successfully reinvented Metroid and added a second iconic game to the franchise. Prime has it both ways, seamlessly segueing from the power suit's HUD -- which registers everything from raindrops to blood spatters -- to third-person morph ballin' fun. Some gamers even catch a glimpse of the lovely lady herself in the multifunctional visor's reflection. Items and enemies can be scanned for more information, revealing story elements if you want them and hints if you need them. Item collection takes precedence over finish times to get the best ending. Everything makes sense. This is how Metroid is supposed to be.
Just for those who keep calling Metroid Prime 3 an FPS. 
