Expanding the size of the in-game map from previous GTA titles , GTA : San Andreas is set in the semi-fictional state of San Andreas ( based on California and Nevada and named after the San Andreas Fault line ) and its three metropolitan cities : Los Santos ( based on Los Angeles ) , San Fierro ( based on San Francisco ) , and Las Venturas ( based on Las Vegas ) .
The game takes place in a fictional state called San Andreas , which has three cities : Los Santos ( Los Angeles ) , San Fierro ( San Francisco ) , and Las Venturas ( Las Vegas ) .