(2nd island) kill the shopkeeper with a shotgun,
steal a mafia sentinel and run over 20 mafia members then go through the tunnel next to 8 balls bomb shop
(1st island) and type;
R1,L1,R2,L2,left,right,up,down,left,right,up,down. And she will appear in the tunnel
Save 70 pedestrians and an adrenaline pill will appear outside any of your save points.
Complete the Ambulance level 12 and Infinite Run will be granted.
NOTE:You do not have to save the pedestrians consecutively. You can do it as you go through the game