Mobstopper
In game modes 1-3, there are various gangsters who will chase Sam with the intent of throwing him off the roof of a building if he gets too close to them. To make these gangsters completely unaware of Sam's presence:
In game mode 4, after Lana has been put in jail, Sam is chased relentlessly by one of the mob, who will keep dumping him off the roof of the apartment building next to no. 19 until he runs out of money. To disable this gangster and enable Sam to walk freely around the city with the budgie:
All keys
To give Sam the keys to no. 15, no. 19, no. 27, no. 31 and no. 74 while a game is in progress:
Keep the lights on
People have an annoying tendency to flip light switches off as they walk past them, which can make it tricky to navigate inside a building. To ensure that the lights stay on (even when a fuse is blown):
POKE 63465,0: POKE 63468,175