The brand is advertised on the radio but it is not found in San Andreas as a business, although the business address (found in the official manual of the game) on the billboards read Dix Road, Los Santos. In GTA IV, de Koch has several shops, located on Albany Avenue, Lancaster and Columbus Avenue, Star Junction, Algonquin, Liberty City. In GTA V and GTA Online, the player can buy De Koch clothing accessories at Ponsonbys. In GTA Online, organizations can store and sell looted De Koch jewelry.
The company is a parody of De Beers.
|De Koch Diamond Studs||$4,590|
|De Koch Obsidian Studs||$4,100|
|De Koch Sapphire Studs||$3,850|
|De Koch Opal Studs||$1,850|
|De Koch Platinum Studs||$5,250|
|De Koch Garnet Studs||$2,700|
|De Koch Jasper Studs||$3,100|
|De Koch Aquamarine Studs||$5,050|
- The name is a play on "the cock".