lol, when was Metroid Prime 3 made a linear first person shooter? After I bought it and started playing it?
MP3 is just as adventurest as the other Metroid games. It just replaced MP's clunky old control scheme with one that happened to be perfect for shooters, but the game itself isn't anymore first person shooter then the other Prime games. Have you even played it?
Edit: Oh wait, you haven't. No wonder...
I don't know where you got the idea that they turned Prime into an FPS, but's wrong. Like the original Prime, it started out very simple, with lots of shooting in mind and not much else. But it doesn't take more then an hour for the adventure aspects to kick in. As long as you start on Veterans mode, you will not be dissapointed, as it is easily the best Prime in the series, or at least better then Echoes and Hunters.