Game Revolution writes: "UFC 2009 Undisputed is exactly what the UFC series needs, after a long hiatus since the mediocre UFC: Sudden Impact in 2004, and what THQ needs to get back on its feet. As unfriendly as it is for beginners and, well, anyone that isn't used to pressing every button and moving the joystick on the controller in every which way, that's just perfect for a brand that is "as real as it gets". The first year of THQ's contract with the UFC concentrates on shaping and refining the gameplay without any bells and whistles, and while it's successful, it sacrifices a bit too much for the sake of keeping it real. But as a foundation for what is to come, it ranks as one of the most important revitalizations of a series - and I would even say - in video game history. Really? Really".