If the houses are red, that means you haven’t played enough missions to unlock that area of the game. Question for Grand Theft Auto: San Andreas Forgoten_Scars answered: There is no cheat to do that. How to unlock red houses in gta san andreas? RMB means click or press the right-mouse button. LMB means click or press the left-mouse button. 2 r type “Rocketman” then type “Aezakmi” then fly through you want. What is the cheat code to unlock all cities in gta san andreas?ġ:If you want to unlock all cities and complete all missions,then get a save game from anyone,which has all things done. How do you open the lock in GTA San Andreas?