First, finish the game with all the side missions, including the asset missions like working as a valet, as a courier, and in the quarry. Then, you have to beat all the available races, stadium events, vehicle challenges, and the driving, boat, and bike schools. It is also needed to beat all the vehicle missions, like the firefighter, vigilante, taxi driver, paramedic, freight train, and pimping missions. As well, you have to complete all the three imports and exports boards, beat all the challenges in Ammu-nation, get all the collectibles (tags, snapshots, oysters, and horseshoes), purchase all the available properties, learn all the moves in the gym, and getting at least 35% girlfriend progress with Millie Perkins.