Throwdown is a good game! I just played it for an hour, and It's excellent! The career mode is, by far, the best part of the game. You create a fighter from scratch, it's not like, "OK, take one of the guys we've loaded into the game and go," it's, "OK, create a fighter, train him to hone his skills, put him in sparring tournaments so you can gain more training points, train some more, etc."
There are also Pick and Go modes, like UFC Mode (A Five-Round tournament for the UFC Title), Tournament mode (3 Rounds), and Arcade mode (Beat ten opponents). And there's also a training mode to practice in before stepping in to the Octagon.
I Highly Recommend this game.