Equip some armor.
Find a Tommy Gun.
Enter the underground laboratory.
Blind yourself with night vision goggles.
Find some painkillers.
Kill your first Zombie.
Build a campfire.
Survive for 28 days.
Find the church.
Find an axe.
Craft a zombie cloak.
Light a campfire.
Find a revolver.
Find a Knife.
Enter the quarantine zone.
Harvest wood from a tree or log.
Craft a bow.
Harvest guts from a zombie.
Find a broadsword.
Harvest Stone.