Well, so I started playing the first Prime again, and now I remember why I liked it so much in the first place. It just had incredible level design, and a lot of exploration. In my opinion, it's still the best of the bunch. Anyone remember that it told you about a new save station whenever there was one close by?

It seems like the jumping in it is a lot more "floaty".
Then I pop in Echoes, and man, I started to remember how difficult the game was. You were never safe, because pirates would randomly appear when you wouldn't expect them. That added a lot to the gameplay. Not only that, but each time you went to a new area in the dark world, it would give you a feeling of nostalgia...
Going to Corruption, I think all the elements that were in previous games were dumbed down; level designs not as complex/unique (c'mon, Norion is very symmetrical in a lot of ways), not as much exploration, etc. It was done to be a lot more linear, and to focus on the Wiimote. It seems like the whole game is based on the Wiimote.

Not a bad thing, but it definitely took the team off the focus from the original formula.
Is it just me, or do the planets seem way too small? I think each area in the first two Primes are a lot bigger than each planet in Corruption! I could be wrong, but the planets felt unusually small...Oh well, enough yapping for the night.
