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Zombie Air Force Guide: First things to do when you load in
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About
OverviewZombie Air Force is a cooperative shooting game by fresh green beans where you and your squad fly against waves of zombies and giant Behemoths, fighting to push the front line as far as possible. This guide covers how credits and upgrades work, how to handle the enemies you will face, and what it takes to reach each of the four endings in the HOLLOW NIGHT event.
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Contents
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✈️ Zombie Air Force
01
First things to do when you load in
StepIn short
Redeeming codes before anything else gives you a free head start.
The moment you are in the game, head straight to the store and redeem your codes before you forget. Each code can only be used once per account, so the sooner you enter them the better.
- Open the store find the store screen inside the game.
- Enter the codes SPIRIT and HOLLOW for free gifts.
- Join the official group doing this gives you a permanent +10% boost to both XP and credits.
02 Working codes
Codes
3MIL
4MIL
SPIRIT
HOLLOW
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03
Credits, upgrades, and earning faster
TipsIn short
Stacking the group bonus, the weekend buff, and friend invites builds up credits faster.
Credits drop from every enemy you destroy, and they are the resource that unlocks the 180-plus upgrades on offer. Three boosts stack on top of your base earnings.
Tips worth knowing
- Joining the developer's official group adds 10% to every credit and XP drop you earn.
- Logging on during the weekend activates an automatic x2 earnings buff.
- Inviting friends grants you an XP and credits buff on top of everything else.
04 Live and upcoming events
Events
Events running now or coming soon. They have fixed dates, so check them first.
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05
Weapons and enemy types
Table
In short
Matching your weapon to the enemy type keeps the front line from collapsing.
Your aircraft carries three main tools: rockets, a chain gun, and air strikes. Zombie hordes and massive Behemoths require different approaches, and defence-lowering skills change what your whole team can deal out.
| Rockets | rain down on hordes of zombies. |
| Chain gun | chain gun fire for sustained pressure. |
| Air strikes | focused on Behemoths and large targets. |
| Defence-down skills | drop defences to hold the line with allies and amplify team damage against Behemoths. |
06
The four HOLLOW NIGHT endings
Table
In short
Each ending has a distinct condition and awards its own badge.
HOLLOW NIGHT is an in-game event with four possible outcomes. Each outcome awards its own badge when you meet the condition.
| Ending | Badge name | What has to happen |
|---|---|---|
| True Ending | First Dawn | The heart goes dark and the sun rises over the Hollow. |
| Good Ending | Hold The Line | Gallows Hill holds until the Wyrm falls. |
| Neutral Ending | The Hunt | The scarecrow burns and the Wyrm falls, but the horde does not scatter. |
| Bad Ending | Lost Night | The Wyrm falls, but the floodlights on Gallows Hill never come back on. |
Glossary
Glossary- Credits
- The in-game currency you earn by destroying enemies, spent to unlock upgrades.
- Behemoth
- A giant enemy that appears among the zombie horde and requires focused team fire to bring down.
- HOLLOW NIGHT
- An in-game event whose outcome produces one of four distinct endings.
- x2 Buff
- An automatic bonus that doubles credit and XP earnings for everyone who plays on weekends.
Common questions
FAQWhere do I enter redeem codes?
Open the store screen inside the game and type your code there. Each code works only once per account. Use codes SPIRIT and HOLLOW for free gifts.
How do I reach the True Ending in HOLLOW NIGHT?
You need the heart to go dark and the sun to rise over the Hollow. The other endings happen when different conditions are met, such as the floodlights on Gallows Hill failing or the horde refusing to scatter after the Wyrm falls.
What is the fastest way to earn credits?
Join the developer's official group for a permanent +10% to credits, play on weekends for the x2 buff, and invite friends for an additional boost.
Updated Nov 8, 2026
Game updates can change what is on this page. If you spot something, get in touch and let us know.
Game updates can change what is on this page. If you spot something, get in touch and let us know.
