The Sumo brand is most notable as the manufacturer of Claude's Sumo Wordman pager in GTA III, but can also be spotted in multiple locations in the aforementioned games. The company's slogan is "The Industry Heavyweight".
Sumo billboards are present in GTA III in Staunton Island and Shoreside Vale. In addition, the Sumo logo can be found on certain Yankee trucks in GTA III and use Bensons in GTA Vice City. In GTA San Andreas, Sumo is known to operate in a building at the LVA Freight Depot in Las Venturas, San Andreas in GTA San Andreas; Sumo sponsorship stickers are also present on Hotring Racers cars in GTA San Andreas, and Inside Track betting shops utilize Sumo televisions to televise horse races.