Berkley is a resident of San Fierro who is a rival of Zero. The two each own their shop, although their rivalry goes back to when Zero won the top prize at a science fair. The two are, in 1992, involved in a war involving remote control vehicles. Berkley, having just returned to San Fierro, launches 'a full scale attack' on Zero's shop and transmitters. Berkley's delivery men and vehicles are then targeted by Zero's ally Carl "CJ" Johnson, and then defeated in a remote control army battle. After losing the battle, Berkley is told to pack up his business and leave San Fierro.
The whereabouts of Berkley are unknown, although he continues his rivalry with Zero. He is informed by Zero of the casino heist planned by Carl, his friend Wu Zi "Woozie" Mu and Woozie's organization, the San Fierro Triads. He alerts the authorities, who storm the casino just as Carl is escaping. Berkley, however, is unsuccessful, and Carl and his team arrive back at the Verdant Meadows airstrip. Carl punches Zero for what he did.
- His name may be a reference to Berkley California.