Location not disclosed
Spend your first Talent Point.
Spend some rubies in the ugrade menu.
Play through the intro.
Finish all 10 missions
Get 50 headshots
Kill 100 enemies
Rescue and secure a civilian
Kill 100 zombies with your vehicle
While stopped during a task, don't let a single zombie reach your vehicle's hood
Weaken a hood grappling zombie with 1 weapon, then quickly switch to another weapon to finish it off with one shot