The fourth installment in the Ultimate Knockouts series brings even more hard-hitting action. Picking up right where Ultimate Knockouts 3 left off, Ultimate Knockouts 4 features all the best knockouts from 2004-2005. Includes UFC superstars Chuck Liddell, BJ Penn, Andrei Arlovski, Georges St. Pierre, Paul Buentello, Dave Terrell, Nick Diaz, and many more