I've had a thought in my head of late. I'm slowly, slowly building my vault up, and I'm sat just under the threshold for Deathclaw attacks. My vault is well equipped room-wise, but I really need to invest in new dwellers now I've got my training rooms set up as my current ones are very weak (didn't have a high Endurance at low enough level). That said I thought it might be a good idea to gun for the one-hundred population mark with a massive population boom to unlock all the rooms so that when the inevitable Deathclaw attacks come and wipe out my vault I've still got access to all the rooms and can rebuild up accordingly.

Just one niggle: I don't know if rooms stay unlocked if you drop back below the unlock threshold. Does anyone have an answer to that?

Unlocked rooms will stay unlocked even if you drop your population under their threshold.

And about forcing a DC attack to clean your vault, as it's been said several times, better build a killroom somewhere in your vault so you can control population. A slower way is to send unwanted dwellers to the wastes for them to die.

Thank you. That's good to know. As for forcing the Deathclaws to kill my vault, that wasn't an intended part of the plan. I was going to keep as many Dwellers as I could whilst training up new ones (as they're already skilled up for their particular rooms). Deathclaws killing a lot of them was more of an accepted inevitability.

The real question is do Deathclaws stop coming after you've broken the dweller limit they appear at.

Do they stick around just like the room unlocks?

Or do they go away?

If they keep on coming you would be dooming your vault.

True. I have read around that if you're over the limit then a way to stop Deathclaws is to deliberately cull your vault back down so I'm guessing they do stop. We'll find out soon enough, won't we?