The GoodThe weapons and the missions. There are 24 missions in the game, and almost all of them are challenging and fun. They are highly diverse, and each develops the theme for that mission. The weapons are good too- from the "big joe" (an awful bow and arrow type contraption) to the Panzerfaust (a tank destroyer) the game is hours of fun.
The BadThe ending was pathetic. What of the big climax? What of the celebrating in the streets? What of the replays of the best parts? The game itself was rather linear- if I did it and if my friend did it, we would have done the exact same thing. There is not much you can do to customize it. Also, you really don't get to know the characters. All in all though, it was a remarkable game.
The Bottom LineBUY IT. IT'S THE SECOND BEST GAME I OWN.