Payback 2 - Caught by the fuzz escape from the jail (English Subtitles)

When you disable the gate, turn right. You will have to drop from the catwalk to prevent the cop there from spotting you. Then, head through the doorway ahead and turn right after going past it. There will be several guards around, keep going until you find a room with a key in it. There's a guard in the room patrolling, it's possible to avoid him entirely and it's easily done by going behind him, sometimes dash-n-go strategies also work and will not alert him. There's a key in the room, steal it.

Go out without alert the guards, head for the pier in the left, and steal the boat or helicopter. If you act fast, you can enter the boat or helicopter before you get shot twice. Once inside, sail ahead, and when you land, go to Fry's garage house.

The key to the gold medal in the mission is to keep running consecutively - Especially when you reach the gates of the prison. If the cops police is walking away from you, you must quickly run through the gate without alerting him - In the newer version, a player can only take 1 shotgun blast before dying at a second, therefore, if he sees you, the remaining two cops that you could have dodged during the next part will always either cause you to lose, or not to get the gold/silver medal at all because you need to pick them off.