Haven\'t played SSX Tricky. Only the original. However, SSX Tricky, which from what I know, is pretty much just an improved version of the original, it will probably go like this. Fun for the first few months, but once it gets old, won\'t be seeing a lot of play time. Still, when I was playing it, tons of stuff to do and a lot of secrets to uncover (well, many not A LOT but there were secrets to lengthen the gameplay [which I expect that SSX Tricky to have a few more secrets then SSX]).
As for MGS2, great game. Story is a little far fetch in areas, but still, lots of gameplay and had a lot of fun with it. Which, unfortuenetly, concerning the gameplay, isn\'t fully untilized until the "director\'s cut" edition, MGS2: Substance. Which is, the moment, is $40. Again, great game.