A great ending to a great trilogy.
The way you control Samus is by moving her with the Nunchuck and and shooting with the Wii remote. There is an option in this game in which you can choose to shoot with either Lock On/Free Aim or just locking on just like in the first 2 games. Unlike Prime 1 and 2, you don't lose any of your power-ups. Instead, you start out with all of them and find more on your quest. When you get a beam, it's like in Super Metroid in which they're all stacked. They all provide the same effects as each seperate beam but into one. You also get to use a P.E.D. suit which allows you to use your Phazon to shoot and use other Phazon abilites you eventually get.
There are in total 6 places you explore in this game. In each area, you will encounter bosses often which is good considering they all provide a challenge. You will often have to uncover their weakspot with something like a Grapple Lasso. The bosses are actually pretty easy sometimes since you have the P.E.D. suit. The Phazon inflicts more damage to enemies and bosses, though sometimes the only way to kill them is by using the P.E.D. suit. Unlike previous games on the Wii, this game actually makes use of all of it's technology and makes the planets, effects and people look more real. The details look great and smoke from missiles and explosions look very realistic. Also the way you control Samus with the shooting and running is done perfectly in this game. For some reason, other games that have tried to make shooters with the same controls were either very bad or just plain sucked. But Retro Studios manages to do it right.
Also new to this game are 2 other things. One of them is the difficulties in this game. You could choose from Normal, Veteran, and if you beat a file, Hyper Mode. This feature kinda makes you want to play this game again. The second new feature is the shop. For every new creature or lore scanned, you will get a token. You also get a token for defeating bosses and from trading friend vouchers with other friends. You can use your tokens to buy artwork, music, and bonuses that add to your game.
This game brought greatness to the Metroid Prime trilogy and though it's now over, Retro Studios might just surprise us one day with a new 3-D Metroid game. For now, enjoy this game which will give around 15 hours of gameplay.