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Earned progression
Zombie Air Force Upgrades
Zombie Air Force upgrades turn earned Credits into a longer-term combat plan, with over 180 upgrades advertised by the developer. This category helps you choose an upgrade family, understand access versus progression, and put one useful goal ahead of a scattered shopping list. Begin with the question that is blocking your next purchase.
One progression goalGive the next purchase a specific combat purpose.
Start from a repeated job, then set the spending goal
An upgrade plan is easier to follow when it belongs to something you already do in battle. Pick the attack or defense responsibility you expect to repeat, then make your next purchase serve that role. Our upgrade order guide develops this approach for players who keep changing goals. The overview groups the familiar combat choices and named trees so you can narrow the plan before deciding on a price.
Access and progression are separate decisions. The official Little Bird pass gives instant access while leaving its Armoury upgrades to be earned, and Grimhawk access likewise leaves progression ahead. Cryo Emitter has its own dedicated upgrade tree. Use the tree guide to keep those distinctions clear, then read the displayed cost in the game before setting your Credits reserve. A paid unlock should not quietly replace the rest of your progression budget.
Which upgrade decision comes first?
Choose a family, understand its tree, or decide the purchasing order.
I need to narrow the upgrade options
Group combat families and the named earned trees.
Browse upgrade familiesI am mixing access with upgrades
Separate an instant unlock from the progression that follows.
Understand upgrade treesI keep changing my purchase goal
Pick an order based on the job you repeat in battle.
Choose an upgrade orderUpgrades articles
The upgrade articles cover family selection, access, ordering and weapon progression. Choose the one that answers the decision before you.
Guide
Zombie Air Force Upgrade List: Combat and Earned Trees
Explore combat and defense upgrade systems, compare the Little Bird, Grimhawk and Cryo trees, then choose one progression goal.
Guide
Zombie Air Force Upgrade Order: Earn Credits and Choose a Role
Choose an early upgrade around your combat role, separate squad problems from purchase needs and budget for earned aircraft progression.
Guide
Zombie Air Force Upgrade Tree: Access and Earned Upgrades
Find the Little Bird Armoury tree, distinguish aircraft passes from earned upgrades and keep purchases tied to one progression goal.
Guide
Zombie Air Force Weapon Upgrades: Little Bird Armoury Planning
Plan Little Bird weapon progression around its loadout and crew seats, and distinguish instant aircraft access from earned Armoury upgrades.
Keep the budget connected to combat
Choose the next purchase before collecting more goals
The upgrade order guide helps settle one role and one improvement. The tree guide explains how instant access and earned progression fit around that plan.