City Building
Build, upgrade, and expand your city. Strengthen your kingdom and unlock new systems as your power grows.
A Cross-Platform Medieval 4X Strategy Game
Server K0
Beta Experimental Kingdom
Opens June 26 · 17:00 UTC
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Cross-Platform
Play seamlessly on mobile and PC.
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Persistent Kingdom
A living world that evolves with every decision.
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PvE & PvP
Challenge players and monsters in epic battles.
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Alliance Warfare
Unite. Conquer. Rule together.
Build Your Fortress. Lead Your Alliance. Fight for the Throne.
Army Progression
Train infantry, cavalry, archers, and siege units. Upgrade your forces and prepare them for war.
World Map & Monsters
Explore the vast world, encounter dangerous creatures, and gather vital resources.
Resource Gathering
Gather food, wood, stone, iron, and gold to fuel construction, research, training, and war.
Alliance Warfare
Join an alliance, help your allies, launch rallies, reinforce cities, and fight together for dominance.
Throne War
Compete for the Palace, control the kingdom, and prove your alliance deserves the throne.
Server K0 Opens June 26
The Beta Experimental Kingdom begins on June 26, 2026 at 17:00 UTC.
K0 Beta Experimental Kingdom
K0 is the first persistent kingdom of Solderia. It opens before K1 so players can start early and help test balance, systems, and gameplay.
Opens June 26, 2026 at 17:00 UTC.
First 500 to Level 30
The first 500 players who reach Level 30 on K0 receive guaranteed access to K1 and a special K1 Starter Pack.
K0 Is Not K1
K0 is the beta experimental kingdom. K1 will be the first official kingdom and will have limited places.
Gold Match on K1
Gold purchased on K0 will be granted again on K1 when K1 opens.
Example: 20,000 Gold on K0 = 20,000 Gold on K1.
Kingdom Red Envelopes
Every Gold Pack purchased on K0 creates a Red Envelope shared as random Gold rewards with players in the kingdom.
Cross-Platform Progress
Play on Steam, Android, and iOS with the same account and continue your progress across devices.