Various examples of these games can be found in the . Since "Track & Field", games have combined multiple sports into a single game. "Wii Sports" and "Wii Sports Resort" are recent examples. Multisport tournaments are becoming the basis for computer games. Sports-based fighting games are titles that fall firmly within the definitions of both the fighting game and sports game genre, such as boxing and wrestling video games. As such, they are usually put in their own separate subgenres. Often the fighting is far more realistic than in traditional fighting games (though the amount of realism can greatly vary), and many feature real-world franchises or fighters. Examples of this include the "Fight Night", "UFC 2009 Undisputed" and "WWE 2K" series.