SEMI is a clothing manufacturer in Manhunt 2, Grand Theft Auto III and Grand Theft Auto: San Andreas. They mainly manufacture sports wear. SEMI clothing can be seen in Sub Urban stores in San Andreas, selling t-shirts and shoes.

Although no stores can be found in San Andreas and Cottonmouth, some shops in Liberty City can be seen selling SEMI products.

A SEMI t-shirt can be found in Daniel's Safe House.