Xero is a company in Grand Theft Auto IV and Grand Theft Auto V presumably specialized in petroleum. Unlike its competitors, Xero does not appear to have set up any gas stations in Liberty City, although it does operate a refinery at the southwestern corner of the Acter Industrial Park in Alderney. Xero storage tanks and faded advertising of the brand can also be found in selected parts of the city, and Xero sponsorship vinyls are visible on certain Bati Customs designs. Xero is a BAWSAQ-listed company.
- Xero was the original name of the American rock band Linkin Park.
- Additionally, it was the name for an Australian punk band in the late 1970s to early 1980s.
- It is unusual for a petroleum company to use large cooling towers - the official BradyGames guide for The Ballad of Gay Tony calls the refinery a nuclear plant, implying that was its original purpose.