The video above is the Dying Light The Pit Quest Walkthrough and shows how to complete The Pit, the mission featured in Dying Light, the video-game.
The video walkthrough covers the following objectives:
Defend Dr. Zere and His Lab
Find Dr. Zere
Check the Back of the Garrison
Find the Entrance into the Building
Look for Dr. Zere
Get to the Underground Parking Garage
Survive the Arena
Escape the Garrison
Report to Brecken
