MMA FanHouse has an exclusive look at Undisputed's Classic Fights mode, which is more than just watching the fight being played out. Read the article here for more information, such as the rationale behind choosing those fights.
The development team had a lot more to say on this than would fit, but you can check it out if you continue reading here.
UFC 66: Chuck Liddell vs. Tito Ortiz II
UFC 47: Liddell versus Ortiz was the first UFC event I attended live. Since then, I’ve been to a number of shows, but I must say, I’ve never heard the crowd get as loud as it did during the flurry that Liddell finished Ortiz with to get the title. That place exploded. It was crazy, and it’s something I’ll never forget.