Kill 50 zombies

Kill 100 zombies

Kill 200 zombies

First Headshot with a gun

Kill your first Zombie with a Molotov Cocktail

First Kill with the Crossbow

Make it to the Safehouse

Pick up a backpack (Bug-Out-Bag)

Get into the Supermarket

Get into Buckingham Palace

Get into the Tower of London

Get into the Nursery

Survive the Ambush at the Church

Get the XL BOB

Get the XXL BOB

Hack all of the CCTV junction boxes in London

Reach a Survivor Score of 2000 points

Finish Game in Chicken Mode

Finish Game in Standard Mode

Finish Game in Survival Mode