I was one of the many who bought Dreamcast on the day it was released and along with the system I also bought four games: NFL 2K, Ready to Rumble Boxing, SoulCaliber, and House of the Dead 2.  About a month later I got NBA 2K, my expectations were high because NFL 2K was so good.  Well, I have to tell you, I've had this game for over a year now and I still can't stop playing it.  Everything about NBA 2K is so accurate and well presented that I keep coming back for more.  The gameplay is phenomenal, so life like that you sometimes feel as if your watching a game on tv rather than playing it.  There are also great options, including season mode, trades, fantasy drafts, and create a player modes.  The only negative thing I can say about this game is that in almost every game a player gets injured which is annoying.  But other than that, this game has great replay value and is a great addition to any Sega Dreamcast collection.