Two player mode in Los Santos
Note: You must have a second controller inserted in port two. In the Ganton area, start from Grove Street where the Johnson house is located. Drive under the first bridge and continue to go straight. Next, youshould drive over some railroad tracks. After this, you should drive under a second bridge. Take the first right turn you see. It should be a dead end. Drive until your car hits the grass, then look to your left. You should see an open doorway. Walk through it and you should see a small "2 Player" icon. Press any button on controller two to begin. Additionally, when you are on the missions from Big Smoke go north of his house. You should see some wrecked buildings. Go through them to find a two player free roam icon.