The Headquarters is the cornerstone of your city. Upgrading the Headquarters allows you to build and upgrade other buildings, so it's important to do so whenever you have the available resources.
Building and upgrading any building will ALWAYS grant you with XP points to level up your city. In turn, your city level will unlock further upgrades of your Headquarters, thus making it possible to perform even more upgrades on the rest of your buildings.
The Headquarters is available from the beginning of the game.
Progression Table Edit
|Headquarters Progression Table|
|Level||Unlocks||XP||Upgrade Cost||Upgrade Time||Upgrade Now|
|1||Gladiator Residence, Marketplace, Sawmill, Infirmary, Sword and Shield Training Ground||0||500||5m||4|
|2||Gold Warehouse, Armory, Caravan||1||2000||1h||27|
|4||Marketplace (x2), Two Hands Training Ground, Residence||7||12000||5h||89|
|6||Stone Warehouse, Dual Weapons Training Ground||21||33000 6000||7h||151|
|7||Marketplace (x3), Quarry||31||50000 10000||8h||233|
|8||Wood Warehouse, Gold Warehouse (x2), Sculptor||43||80000 17000||10h||256|
|9||Iron Warehouse, Sword and Shield Training Ground (x2)||57||125K 30000 5000||12h||406|
|10||Stone Warehouse (x2), Two Hands Training Ground (x2), Dual Weapons Training Ground (x2)||73||200K 50000 8000||14h||436|
|Marketplace (x4), Quarry (x2), Spear Training Ground||91||270K 100K 16000||18h||667|
|12||Gold Warehouse (x3), Dual Weapons Training Ground||111||400K 190K 30000||22h||766|
|13||Iron Warehouse (x2), Sword and Shield Training Ground (x3)||133||570K 350K 97000||1d||1027|
|14||Iron Mine (x2), Wood Warehouse (x3), Spear Training Ground (x2)||157||800K 700K 189K||1d, 4h||1422|
|15||Marketplace (x5), Two Hands Training Ground (x3)||183||1350K 1000K 300K||1d, 8h||1848|
|16||Stone Warehouse (x3)||211||1900K 1700K 780K||1d, 12h||2294|
|17||Spear Training Ground (x3)||241||2700K 2250K 1400K||1d, 16h||3143|
|18||Iron Warehouse (x3), Gold Warehouse (x4)||273||3300K 3000 2000K||1d, 20h||3608|
|19||Marketplace (x6)||307||3700K 3600K 2800K||2d||4111|