The Rule That Makes an Empty Slot Buildable
An empty module slot becomes available for construction when a completed module is next to it. If you are searching for Hull Rupture how to unlock module slots, that adjacency rule is the key distinction: creating space and making that space buildable are related but separate steps. Hull Construction supplies new slots, while your existing modules determine where you can start building within them.
This is the system introduced in the September demo update. The official Hull Rupture construction and update notes explain the neighboring-module requirement and the later October deep dive adds practical placement constraints.
Add Space Through Hull Construction
Enter Hull Construction while the ship is in flight. Flight pauses, and the game offers a hull block containing empty module slots. Choose a legal position that gives the modules you want a useful place to go.
A practical sequence is:
- Identify the kit or production expansion you are trying to accommodate.
- Look at where completed modules already sit on the ship.
- Place the offered hull block so the new space can connect usefully to that existing construction.
- Build in an empty slot that has a completed module next to it.
- Check the next intended position after the new module is completed.
Do not treat a large empty section as automatically ready for any module. The documented unlock condition requires a completed neighbor. If the slot you want is separated from your built-up area, plan the intervening construction rather than assuming the hull block alone removed that requirement.
Check the Block Before Spending Resources
The September notes say an offered block cannot be rotated. It can attach to a side of the hull or sit slightly away from it on supports, creating a corridor aliens can use. The October devlog also says you must not obstruct the Airlock or engine and cannot destroy a block after placing it.
Those restrictions make the module's footprint important. A block can be legal for the ship while still being an awkward choice for your next kit. Before placing it, check both the room available for the module and the path that leads outward from your completed construction.
The documented system has 15 construction block types, presented in randomized order without repeating until the set has cycled. An unsuitable block can be skipped, but skipping costs resources. Construction uses Energy at first and Plasteel later, so the process is not a free way to keep testing different shapes.
Separate Slot Access From Other Building Problems
A newly available slot does not solve every requirement for a new production module. Keep these questions separate when diagnosing a stalled expansion:
| Question | What to check |
|---|---|
| Is there physical space? | The block layout must accommodate the intended module. |
| Is the slot available for construction? | It needs a completed module next to it. |
| Do you have a suitable kit? | The post-battle shop and Despot's Chamber supply kits under the updated demo systems. |
| Can the economy support the expansion? | New modules add demands to production, staffing, and ship mass. |
Hull placement also redraws the battlefield. Open corners can give long-range turrets useful firing positions, while gaps and corridors can change alien routes. Choose an expansion that supports the ship's production plan without creating a defense problem at the Airlock.
The older shipyard-based expansion method appears in early material, but the September update replaced that approach with Hull Construction. For the updated demo, use the block-and-adjacency rule rather than waiting for an old preset expansion to unlock the next room.
FAQ
What unlocks an empty module slot?
A completed module next to the empty slot makes it available for construction. Merely adding a hull block does not make every new position immediately buildable.
How do I get more module slots?
Use Hull Construction to place a hull block containing empty slots. Consider where those slots connect to the modules already completed on your ship.
Can I rotate a hull block to make a module fit?
The September demo notes say blocks cannot be rotated. Check the offered shape before placing it or spending resources to skip it.
Should I build the largest expansion possible?
Build space that serves a specific kit, production need, or defensive layout. More space is less useful if you cannot connect the intended module or support the added economic burden.