- Requirement: 5 woods.
- Notes: Wooden Jamb required. Doors can be destroyed by melee weapons.
- Destruction Panel (F7): 7 Woods
Upgrade 1 (F6): Bronze Door
- Utility: Stronger that wooden door
- Requirement: 5 woods + 15 Bronze ingots
- Notes: Wooden Jamb upgraded required. Bronze Doors can be destroyed by bronze melee weapons and siege weapons.
- Destruction Panel (F7): 5 Bronze ingots + 6 Woods
Upgrade 3 (F6): Steel Door
- Utility: Stronger that bronze door
- Requirement: 50 Steel ingots
- Notes: Wooden Jamb upgraded required. Steel Doors can be destroyed by steel melee weapons and siege weapons.
- Destruction Panel (F7): 15 Steel ingots + 5 Bronze ingots + 6 Woods