Of course it’s Metroid Prime 3 second after Bioshock.
#1 Bioshock: Bioshock is a brand new experience a shocking one. Much of the game is based on atmosphere which the formidable Xbox 360 dishes out and a shooting experience. I would say Bioshock is as good as it is not because it is a good shooter but because it is good art. By the way in Bioshock you can use many different weapons as well as magic.
#2 Metroid Prime 3 Corruption: Metroid Prime 3 is now the best wii game out shadowing Zelda Twilight Princess. The game is now based on different planets and Samus can use her ship to move around the planets and areas on those planets. The game has voice acting in all over a first for the metroid franchise. The biggest change is the controls, the wii is able to offer controls superior to xbox and ps3 and nearly as good as PC. The game has great design and is well balanced. Many parts are all about shooting others have none at all and solving puzzles is what you need to do. Samus also has new abilities such as hyper mode where she can use a pack on her back filled with phazon to “Corrupt herself” sort of like in bioshock it makes her attacks and health more powerful. The game is the best of the franchise but many parts will feel too familiar to Metroid fans.
I tried not to spoil the stories in each game.
Bioshock is set in an under water city called Rapture.
Metroid Prime 3 is set in Galactic Federation space on a federation ship, planet, space pirate homeworld and many more.
Two great games.