Spacebase DF-9 Wiki
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Version Introduced Alpha 1
Required Zone Any
Size 1x1
Wall Replacing
Footprint 1x1
Cost 12 Matter
Demolish Unknown Matter
This page was last updated for version Alpha 2.1 and may contain dated information. Current version is Alpha 6c

Can be sealed (locked) to prevent citizens and invaders from passing. Doors will slow, but not stop the spread of oxygen between two rooms unless one of the two rooms has been set to "Seal O2". (To do this, select the room, not the door).

Ingame Description

Allows passage between walls. Crucial for room navigation.