What makes the game so fantastic is the realistic way that it portrays MMA. A large part of that is due to the graphics, which are stunning. All your favourite fighters are rendered true to life, right down to the tattoos and cauliflower ears. Mike Goldberg, Joe Rogan and Bruce Buffer are all along for the ride, so the audio is true to life also. And, most importantly, the action is about as realistic as you can get, without actually getting your face punched or kicked in. Of course there's blood and cuts and contusions, and the knockouts are as gruesome as they are in real life, with limp, twisted bodies hitting the canvas. Transitions, clinching, striking and submissions are just as realistically rendered and fairly easy to pull off and get the hang off. But, like in real life, it's the knockouts that are the real seller here.
While most of the big name UFC fighters are in the game (as well as some surprise additions like Tito Ortiz and Andrei Arlovski), the career mode is the feature of the game you'll probably get the most enjoyment out of. You create your own fighter, decide on what disciplines he will specialize in, and then hop into the Octagon and fight your way up the ranks until you get a title shot.
Of the top of my head, there really isn't anything wrong or needs improving in the game - it is about the best representation of MMA that a video game is capable of at this point in time (I'm sure after a couple of more years of innovation this game will look archaic). UFC Undisputed is an addictive game - the type of game that you can pop in one evening and before you know it the sun has come up the next morning (or so I've been told). And of course I'd want my faithful readers to become addicts also, so I've included helpful links below to go and grab a fix yourself.
Amazon.ca - PS3: UFC 2009: Undisputed
Amazon.ca - XBox: UFC 2009: Undisputed
Amazon.com - PS3: UFC 2009 Undisputed
Amazon.com - XBox: UFC 2009 Undisputed