Mafia

Hit SHIFT and the tilde key (above the TAB key) when the game is running and enter the following cheats.
badgangsters - invulnerability
deadguns - restock guns and ammunition

When in the Extreme Freeride mode, you can go to the lighthouse for hints. Go to the door of the lighthouse and equip your map. With the map equipped, right-click the door. With the map on you will be able to see exactly where the mission can be found.

You must complete every mission in Free Ride Extreme Mod.

To unlock Free Ride Extreme Mode, beat the game once. In this mode, there are new cars and no cops in sight.