Well, I rented BioShock. It's pretty neat, but I doubt this game is as epic as Metroid Prime 3 will be. I'm not particularly fond of the combat in BioShock. Ammo is limited, and with the wrench, you pretty much have to get damaged 'cause there's no way to avoid or block melee attacks from what I've played. Plasmids are cool, but EVE (Plasmid ammo) is also limited.
Right now, I just beat the first boss and encountered my first Big Daddy. The guy is a biz to kill, and I haven't actually killed him yet. But the thing about this game, is that it should be easy to kill anything, because if you die, you're simply resurrected in a Vita Chamber, and there is no consequence to this. The enemies that you've damaged so far remain hurt, so you can hurt a Big Daddy a little bit, die, hurt him some more, die, hurt him some more, die, then kill him. So you could kill a Big Daddy with a wrench if you wanted to, it'd just take a lot of time to walk from the Vita Chamber back to the enemy. I've also heard that people like to regain EVE by killing themselves whenever they're near a Vita Chamber, so they can respawn with more EVE.
But whatever.
Heh...the game is pretty creepy. God...there was this one part that was pretty damn scary (or just startling). You walk into this room with an empty chair, and it gets all foggy. When the fog clears, there's a dead body in the chair. Not scary. Pretty boring actually. So you walk to up this item sitting on a counter, and the screen fogs up again. Blah blah blah. You get the item, turn around an-- HOLY CRAP, THERE'S A GUY STANDING RIGHT BEHIND YOU! And I whack him with my wrench repeatedly. I don't know if he attacks you or not, 'cause I was quick to kill him 'cause he surprised me. ^-^;
But yeah, the game is neat.