CheatCC says, "2010 Undisputed feels like a real sequel, and even though there are some similarities between this year's and last year's Undisputed (such as the roster and the format of the career mode) there are enough additions and improvements in this title that it feels completely fresh. If you liked last year's UFC title, then you will definitely love this year's, and if you have never tried the UFC Undisputed series, 2010 is definitely a great place to start."
However you game, celebrity cameos can always make the experience more interesting. Here is Bit Culture's Top 10 Celebrity Cameos In Video Games.
MMA is one of the most intense and exciting sports to watch, but notoriously violent. For those not up to the intense dedication and training that learning MMA take, PS3 and Xbox offer a number of games which are the next best thing.
GXC: "Have you ever heard that Trophy ding, that Achievement bloop to see a title jokingly referencing your favorite movie so cleverly that you bust out in laughter? Developers have creative minds, that is for certain, but when you see em take that creativity and toss in something witty and humorous, there’s something special about it. Taking the extra time to appeal to a much broader fanbase is always respected in the gaming community, so here are 15 awesome references seen in trophies and achievements."
I think Lego Lord Of The Rings at least deserves an honourable mention
Trophy - One does not simply...
Earned - Walk into Mordor.
Made me laugh :)