This is one of the great games that make it work in 3D after being in 2D. Some of the awesome things you can do with this game is making your own rides, and then actually RIDE THEM. You can make a little you, and tailor there likes of rides to yours, so you can see how you would feel in the park, or just make up famous people like Tom Cruise or do completely mad up ones like Harry Potter. Probably the best thing about it is that there is a free mode, with the ability to just play the game. There are also tools so you can make your own custom levels to test your friends. There is also an option to import your own music in to the game, and use it as just background music, or music on particular rides. There are a few wired things that can happen, but most of them are just funny, and none game braking. Worth buying if you want to make your dream theme park, or just go nuts with building the most extreme rides you can think of.
Assassins Creed is not so much a game, than it is a proof of concept. The concepts its trying to get across are best left to you to find out, as they are key to the story in a way as well. The main thing you have to remember here is that this is the Directors Cut of the game. In the original, there were 3 tasks you did then you did the assassination. However, in the DC edition, there are an extra 3 things you can do, giving you six things to do before an assassination. However, you still only need 3 of them to actually do the assassination, so you can mix it up if you want. :) The other thing with Assassins Creed is that this is only the first game. Assassins Creed 2 is far and away a better game than AC1 ever was, so it is worth getting though AC1 so you can comprehend what is going on in AC2, as AC2 literally picks up where AC1 left off. To Conclude, AC1 is a good game, and worth playing once. However, seconded and third plays are probably not going to be.