RimWorld Odyssey Gravity Anchor Guide (Grav Anchor)
The Gravity Anchor in RimWorld Odyssey stops the game from deleting your current map when your gravship takes off. If you leave without one, the map is gone forever, and anything on it is lost.
What the Gravity Anchor Does
The Gravity Anchor is a structure you can build after researching Basic Gravtech. Once placed, it marks the tile as permanent. That means when you launch your gravship, the map stays saved.
This lets you return later with your gravship and everything will be exactly as you left it. Without one, the game deletes the map the moment your ship takes off.
You only need one anchor per map, and it works automatically once built.
How to Unlock and Build It
Unlock Basic Gravtech in the research tree
Open the Architect menu and build a Gravity Anchor
Place it anywhere on the map before launching
It has no fuel cost or maintenance. Just build it and forget it.
This is useful for asteroid mining, orbital salvage, setting up temporary outposts, or just testing different ship layouts without losing progress.
When to Use a Gravity Anchor
Use a Gravity Anchor before taking off if:
You want to come back later
You left behind pawns, loot, or workbenches
You’re salvaging a space station over multiple visits
You want to move your ship’s layout and reland in a better spot
You can remove an anchor later, but if you launch after that, the map will be wiped.
It also works well if you're detaching part of your gravship and returning to dock it later.
Final Blurb
If you care about anything on your map, build a Gravity Anchor before launch. Without one, the whole tile is gone forever. It’s one tile, no cost, and saves you from permanent regret.
FAQ
Q: What does the Gravity Anchor do?
It keeps the map saved when your gravship leaves.
Q: How do I unlock it?
Research Basic Gravtech.
Q: Does it cost fuel or power?
No, it’s passive once built.
Q: Can I move or reinstall it?
No, but you can destroy it and build a new one.
Q: What happens if I leave without one?
The map and everything on it is permanently deleted.
Q: Does it work on space maps too?
Yes, it works anywhere you can land your gravship.
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