From the PlanetXbox360.com feature top 10 list:
"Since the dawn of gaming, players have spent most of their time doing harm to creatures of various sorts. Some of the original games saw you chomping ghosts or blasting invading aliens from the sky. In most games it’s done for some noble or legitimate purpose, i.e. rescuing others or yourself from certain doom, saving the planet from a hostile takeover or foiling a villain’s plans for universal domination. The various minions you might have to defeat in droves over your quest are many and varied, so we thought it’d be good to give them some recognition. Without further ado I present the top 10 video game enemies we like to kill."