Complete the indicated task to unlock the corresponding ending.
Complete the game with the USB drive item.
Forgetting about or dying without the USB drive item acquired and used, then optionally retrieved.
Dying on the final area in Survivor mode.
Ammo Conservation
Ammo is obviously vitally important in ZombiU as the easiest and safest way to take out roaming zombies. You should preserve your ammunition for when taking on larger groups of zombies.
A great way to take out zombies without using ammunition is to use the surroundings to your advantage. If you find a fence that zombies have to crawl under or objects they have to clamber over, stand on the other side with a baseball bat and smash some skulls!
Be aware also that you can lure the bomber zombies towards others and then blow up the gas tanks that they carry to take out additional enemies without wasting extra bullets.
Rather than using bullets on huge crowds of zombies, deploy blanket weaponry such as flares to draw in the enemy, then grenades, molotovs and mines.
Brick Lane Flats: Dee letter
There is a Dee letter in Brick Lane Flats, Old Brick Warehouses behind a door that requires a code to enter. To find the code, step out of the room and look on the window to find an outline of the Raven Dee symbol on the glass. Line up that outline with the inside marking of the symbol on the wall with the cypher lock. Scan it with your tablet to get the code for the door.
Duplication Exploit
This duplication cheat may require a few attempts, depending on where you tap on the screen (see the directions below; you have to get it just right or it won't work). Note that the exploit seems to only work on the small and possibly the medium packs. The larger pack won't allow the item duplication.
1. Fill the loot chest in your safe house until you can see the very top right-hand slot.
2. Place the item you want to duplicate in that slot.
3. Check your backpack.
4. Tap to the right of the top right slot in your backpack (as if there is another slot next to it).
5. Your item should glitch its way into your hand and you can place it in the backpack.
Keypad Code Buckingham Palace
The keypad code at Buckingham Palace is 4324, this can be found written in blood on the wall next to the keypad.
Letter of Dee Victoria's Memorial Location
In the room at Victoria's Memorial where you get C4 you will find a dead body slumped against the wall. Loot this body to find the letter (don't bother zombifying the body).
Quick Turn
Make sure that you use the quick turn button (R) to check what is behind you. It is hard to get into the habit of doing this if you are used to other FPS games, but pressing it once, to check behind you, or twice, to have a quick glance and return to face the front, you will make sure you do not have anything sneaking up on you.
RADAR Tips
The RADAR is absolutely crucial in ZombiU. You need to use it to spot where enemies are but make sure you remember that it also picks up animals! Using it to pick up any zombies in a particular area can make it much safer for you to pass through, however.
Raven Door Code
For the Raven door code in the warehouse when you are going for the second book, you first need to complete the Tower of London mission. Then, you can find parts of the code spread out in the bunker. The first is in the mirror by the door, the others are found by scanning with the blacklight in the room - follow the blood trails to get them.
Re-open all manhole covers
During the final portion of the game, after you have retrieved the Doc's eye, return to the safe house (after going through the kitchen). Once you do this, the prepper basically closes off all fast track routes. From here in the safe house you can go back to each level, locate the manhole covers and re-open them. This will allow you to fast track to any level again, which can make escaping the palace a lot easier.
Uplay Rewards
These rewards can only be unlocked after being redeemed in Uplay.
Unlockable
How to unlock
Bonus videos
Redeem for 30 points.
Cricket bat customization
Redeem for 20 points.
The Last of Them Multiplayer Game Mode
Redeem for 40 points.
ZombiU Logo 80s style
Redeem for 10 points.
Warehouse: Raven door code
A door code is required in the warehouse you go through when finding the second book the royal bunker doctor needs. You will not be able to get the code until the Tower of London mission has been completed. You now have the ability to read the Enochian language. Return to the warehouse and clear the area around the keypad. Next, enter the office beside the keypad room. Look through the glass towards the keypad and notice that the Raven of Dee above the keypad door is incomplete. Also there are some incomplete pain marks on the glass. Move around so that they line up, then scan it to get the code. Note: There are four digits spread out in the bunker. Besides the one in the mirror by the door, you can find others by following the trails revealed by your blacklight.
Weapon Upgrades After Death
After you die in ZombiU your weapons will stay upgraded. If you die before you are able to loot your former-self as a zombie, then the weapons and items that you had will appear in sections of the game that you have previously visited.
If you scan CCTV boxes you can use the safehouse computer to spot loot that has respawned in areas that you have visited previously.