Fortress construction
Construct new buildings, upgrade them and expand your settlement outward from the ruins. Your layout and upgrade choices shape how quickly your empire grows.
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Game features
Everything you need to rebuild a ruined fortress, defend it against escalating sieges and rise to rule the realm.
Build
Raise and fortify your stronghold
Walls and gates
Rebuild and reinforce your defensive walls and gates. They are your first line of defence when raiders reach your fortress.
Defensive towers and cannons
Raise towers along your walls and deploy cannons to strike attackers before they break through.
Fuel your kingdom
Every wall, tower and soldier costs resources. Keep them flowing.
24h
Offline resource generation
Your production does not stop when you put the game down. Resources keep accumulating while you are offline, and progression upgrades extend that window up to a maximum of 24 hours. Return, collect and keep building.
Resource production
Construct and upgrade production buildings to generate the resources your fortress depends on. Higher output means faster construction and a stronger army.
Warehouses and storage
Warehouses hold the resources you produce. Expand and upgrade your storage to manage larger stockpiles as your empire grows.
War
Armies, enemies and sieges
Your kingdom will be attacked. How well you prepare decides whether it survives.
Army recruitment
Recruit soldiers and develop your army so you can defend your walls and counter every raid.
Enemy unit types
Face different types of enemies, each with specialised abilities that demand a different defensive approach.
Enemy commanders
Powerful enemy commanders lead the most dangerous assaults. Defeating them is a true test of your fortress.
Multi-wave raids
Raids arrive in waves. Hold the line through each one, and expect the pressure to build as your fortress grows.
Siege warfare
Withstand full sieges with walls, towers, cannons and troops working together, all the way to the final boss siege.
Grow stronger, go further
Long-term progression that rewards every hour you invest in your empire.
Research and upgrades
Research improvements and upgrade your fortress, economy and defences to stay ahead of stronger enemies.
Campaign progression
Advance through campaign missions that guide your journey from a ruined fortress to the throne.
Fortress Levels and achievements
Climb through 10 Fortress Levels and earn achievements as you conquer new challenges.
Optional ads and purchases
Empire Zero includes optional rewarded advertisements, which you can choose to watch in exchange for in-game rewards, and optional in-game purchases. Both are entirely your choice.
Ready for the siege?
Build your defences, raise your army and hold your fortress against everything.