Underground city

You don't know what to do with all your and the attack estimation is high? Here's the solution!

Underground city
By burying a large part of the city under the ground, you will free up new space for the defenses above your heads. Look on the bright side, you will be protected from the sun.
Category	Buildings
Sub Category	Foundations buildings
Unlocked by	Foundations
Blueprint	rare
Defence	400
Action Points cost	500
Resource cost	×3 ×5 ×10 ×20 ×20
Ville souterraine
Unterirdische Stadt
Pueblo subterráneo

Use

• Building it gives 400 to the town.

Notes

• In Season 16:
  • Underground city was added.

Construction Sites Wall Upgrade v1 Great Pit • Great Moat • Spiked Pit • Old-school traps • Scavenger's Gallery • Wall Upgrade v2 • Inner Wall • Third Wall • Überwall • Evolutive Wall • Metal Patches • Spiked Wall • Slip 'n' Slide • Shredder Wall • Zombie-shredder • Screaming Saws • Wooden Fencing • Small Fence • Barbed Wire • Bait • Plywood • Concrete Reinforcement • Armour Plating • Armour Plating v2 • Armour Plating v3 • Extrawall • Portal Lock • Automatic Piston Lock • Last-minute Lock • Reinforced Gates • Ventilation System • War Mill • Saniflow Macerator • Emergency Supplies • Wood Plating • Guerilla Traps • Rubbish Heap • Mount Killaman-Jaro • Spikes • Pits • Bomb Factory • Abject Panic • Frat House Pump Water Catcher • Drilling Rig • No Holes Barred • Divining Rocket • Eden Project • Mechanical Pump • Divining Rods • Water Purifier • Water Filter • Vaporiser • Boiling Fog • Acid Spray • Gas Gun • Sprinkler System • Mist Spray • Water Turrets • Shooting Gallery • Hydraulic Network • Faucet • Decon Shower • Sluice • Shower • Nature area of the Survivalists • Vegetable Plot • Fertilizer • Grapeboom • Grenade Launcher • Vitamin Mines • Apple Tree • Ravaged pumpkins • Scarecrows • Mines Workshop Factory • Building Registry • Defensive Adjustment • People's Court • Technicians Workbench • Ministry of Slavery • Altar • Butcher • Abbatoir • Cremato-Cue • Pigsty • Henhouse • Central Cafeteria • Small Café • Central Laboratory • Gallows ( Chocolate Cross during Easter Festivities) • Meat Locker Watchtower Observation platform • Scanner • Upgraded Map • Scouts Lair • Predictor • Lighthouse • Battlements • Guard Tower • Guardroom • Miniature Armory • Swedish Workshop • Manual grinder • Pet Shop • Filtering gutters • Tamer Experiment Center • Catapult • Upgraded Catapult • Small Trebuchet • Searchtower • Cannon Mounds • Rock Cannon • Railgun • Plate Gun • Brutal Cannon • Public lights Foundations The Big Rebuild • False Town • Underground city • Labyrinth • Garbage Dump • Organized Dump • Dump Upgrade • All or Nothing • Fortifications • Community Involvement • Urban plan • Defensive Focus • Cinema • Air Strike • Firework Foray • Bonfire • Hot Air Balloon • Giant BRD • Buzzard's Wonder Wheel • Giant Sandcastle • Reactor Sanctuary Soul Purifying Source • Hammam • Pool • Small Cemetary • Coffin Catapult • Infirmary • Architect's Study • Builder's Merchant • Crow Statue • Blue Gold Thermal baths