Obtained from: The Voice
Difficulty level: Hard
Reward: 6000 Exp
Drive the truck with Jin to the Jungle Tunnel
After short conversation with Jin, she will point you a way to the jungle. Get into a car and set out on a journey (1) #1. Once you reach the tunnel you have to leave a vehicle and follow Jin, while protecting her from waves of infected repeatedly attacking you #2.
After getting to the bunker (2) walk to its door and set on them the bomb obtained from Mike #1. Get away to a safe distance and wait for the explosion. Now get inside and use sewers in order to get to the jungle #2.