For a Fistful of Zombies

Tier 1

Objective: Kill zombies in the area around Jack’s camp

Groups of recently turned zombies can be found in the vicinity of Jack's camp near many of the vehicles on the road as well as in the forest on the other side of the road. Those zombies will not attack you unless you attack them first.

TIER 2

Objective: Jump on cars to trigger alarms

Continue down the road and you will notice some cars which have a blinking red light in the front window. Simply jump on one of them, this will trigger an alarm which in turn will attract zombies, so be sure you are ready for a fight. Kill six zombies in this manner and your mission objective will update.

Tier 3

Objective: Ignite gas cans and draw zombies into the fire

Keep walking down the road and you will notice some gas cans on the ground as shown in the screenshot below. Use one of the cans to light it on fire.

After that you must then draw six zombies into the fire. You may want to jump onto a nearby car to quickly get the attention of some nearby zombies.

Tier 4

Objective: Examine the half-eaten corpses

Continue further along the road and you will notice small groups of zombies on both sides of the road eating corpses, like the ones shown in the picture below. Kill the zombies and examine the corpse to proceed. This will update your objective and trigger a fight so make sure you are ready.

Objective: Kill the corpse gorger

Kill the newly spawned Corpse Gorger in order to proceed. Watch out for its big area-of-effect attack (telegraphed as an expanding circle on the ground).

Tier 5

Objective: Look for survivors in Kingsmouth town

Keep following the main road and eventually you will arrive in the town itself, around (195,305). Mission accomplished!