How does gta5 recruit younger brothers to fight the police together?

1. First of all, in GTA5 game, you will encounter some NPCs (non-player characters), which will have an impact on your task or behavior. Choose some of them as your brothers.

Secondly, by completing some tasks, giving them gifts or trading with them, we can establish contact with these younger brothers.

3. Finally, in the game, I called these younger brothers to the police station, angered them and beat the police together.