This is and amazing game. I'm not sure how long I played it yesterday, because I lost track of time while playing it, but I
[SPOILERS: PRESS CTRL+A]
just got the ice missiles after defeating the third boss, phazon-corrupted Rundas. I found him quite difficult on Veteran mode - nearly ten minutes of sustained fire.
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I never played MP2, but this reminds me in every way of the original MP, but with more immersive controls, slightly more linear (ie. no more getting lost) worlds that still make you feel like you like you can go wherever you want, and far cooler weapons.
One of my biggest concerns when buying this game was that it was going to be to action oriented, and the puzzles and exploration would be downsized, but it all shaped up perfectly. While wandering around the amazing, lush, environments (including effects such as fogged up visor and Samus's reflection), the unique puzzles will leave you stumped for a long time if you don't scan your environment in each new room. I originally wasn't going to go for 100% percent scans on my first play through, but now I still have my scan visor up frequently for all of the bosses, new enemies, and other strange items.
After first starting the game, I was a bit surprised by the controls, until I remembered to change to Advance mode, where I was awestruck at the fluid, easy aiming. By the time I exited the ship I had the controls down fine. Eventually I even got down those precision shots required to open those doors on the first planet (Norion?). The free-aim while locking is also extremely welcome, as well as the auto-hop in morph ball by flicking the Wii Remote.
I honestly am amazed at this game, with its stunning locations, creative level design, and fantastic puzzles, and pacing. Thinking hard about anything negative I could say about this game, the only things are minor, such as the meteor obviously being painted onto the sky, looking out of place among the excellent graphics, the countdown timer not being on screen (it's annoying, but useful), and the situation that occurred in the third boss fight (read spoilers).
This game is an outstanding title for the Wii, and it not only lived up to all of the hype, but surpassed it, while thankfully putting down all of those who wanted an FPS with multiplayer that was on par with Halo (stupid MPH...).
Eh, all my rambling couldn't possibly do the game justice.