Building upgrades

Once per day, certain Construction Sites Construction Sites can be upgraded free of charge (without or resources) : this is called the project of the day.

Just before the midnight attack, the upgrade which has received the most votes is accepted and constructed immediately.

Each upgrade can be improved up to 5 times. Each upgrade brings various advantages (improved defences, increased water reserves, reduced construction costs, detection of zombies, special abilities...).

Note: If 2 upgrades have the same amount of votes, the one higher up on the list will be upgraded.

Defensive Focus

Without Defensive Focus Defensive Focus defensive items are worth 2.0 points each. Defensive Focus without upgrades makes defensive items worth 2.5 points each.

1. Defensive items are worth 3.2 points each.
2. Defensive items are worth 4.4 points each.
3. Defensive items are worth 5.6 points each.
4. Defensive items are worth 6.8 points each.
5. Defensive items are worth 8.0 points each.

Great Pit

Base value: The Great Pit Great Pit gives an additional 20 defense points.

1. Increases defense of the Great Pit from 20 to 33. (+13)
2. Increases defense of the Great Pit from 33 to 54. (+21)
3. Increases defense of the Great Pit from 54 to 86. (+32)
4. Increases defense of the Great Pit from 86 to 119. (+33)
5. Increases defense of the Great Pit from 119 to 170. (+51)

Pump

Pump Pump. Base value: 10 rations of water are added to the Well (one time only).

1. 20 rations of water are added to the well (Once only)
2. 20 more rations of water are added to the well (Once only)
3. 30 more rations of water are added to the well (Once only)
4. 30 more rations of water are added to the well (Once only)
5. 40 more rations of water are added to the well (Once only)

Search Tower

The Search Tower Searchtower originally starts with a 25% chance to undeplete an area.

1. 37% chance to undeplete an area.
2. 49% chance to undeplete an area.
3. 61% chance to undeplete an area.
4. 73% chance to undeplete an area.
5. 85% chance to undeplete an area.

Upgradeable Wall

Base value: The Upgradable Wall Evolutive Wall gives an additional 15 defense points.

1. Increases Defense from Upgradable Wall from 15 to 51. (+36)
2. Increases Defense from Upgradable Wall from 51 to 86. (+35)
3. Increases Defense from Upgradable Wall from 86 to 123. (+37)
4. Increases Defense from Upgradable Wall from 123 to 182. (+59)
5. Increases Defense from Upgradable Wall from 182 to 243. (+61)

Water Turrets

Water Turrets Water Turrets provide 60 Defense by themselves. Please note that if you do not have enough rations in the well to operate the turrets, the turrets will only provide 60 Defense.

1. Increases Defense from Water Turrets from 60 to 108, but consumes 2 rations of water from the well every day.
2. Increases Defense from Water Turrets from 108 to 156, but consumes 4 rations of water from the well every day.
3. Increases Defense from Water Turrets from 156 to 204, but consumes 6 rations of water from the well every day.
4. Increases Defense from Water Turrets from 204 to 252, but consumes 9 rations of water from the well every day.
5. Increases Defense from Water Turrets from 252 to 300, but consumes 12 rations of water from the well every day.

Watchtower

Watchtower Watchtower

1. Every morning, all the zombies within 3 zones of the town are detected.
2. Every morning, all the zombies within 6 zones of the town are detected.
3. Every morning, all the zombies within 10 zones of the town are detected.
4. Every morning, all zombies within 10 zones of the town are detected + Allows citizens within 1 km of the town to return without using any APs.
5. Every morning, all zombies within 10 zones of the town are detected + Allows citizens within 2 km of the town to return without using any APs.

Workshop

Workshop Workshop

1. The cost (AP) of all construction projects is reduced by 7%.
2. The cost (AP) of all construction projects is reduced by 14%.
3. The cost (AP) of all construction projects is reduced by 21%.
4. The cost (AP) of all construction projects is reduced by 28%.
5. The cost (AP) of all construction projects is reduced by 35%.