Written by Andrew Hammel

browse all RimWorld Yes, you can establish a colony on an asteroid in RimWorld: Odyssey, and it's one of the most effective ways to build a long-term settlement. All you need is a grav anchor, a gravship with at least one tile overlapping the asteroid, and sufficient life support systems to endure the vacuum. Once you land, you can construct buildings, extract resources, and even defend your orbital outpost despite the lack of atmosphere.

Here’s how to do it properly.

How to Land a Grav Ship on an Asteroid

Research Grav Anchors First

To colonize an asteroid, you’ll need to construct a Grav Anchor beforehand. You can now unlock this early through the basic grav tech research tree. It requires 5 advanced components, which can be crafted or salvaged.

Build the anchor anywhere on the asteroid or moon tile. Only one ship tile needs to overlap it for a safe landing.

Launch and Land with Precision

Fly your gravship to the asteroid’s world map tile. Land with one corner of the ship overlapping the anchor. The anchor prevents the tile from being deleted when you leave, and also stabilizes docking operations.

Once landed, you can extend platforms and even build a full space dock using heavy bridges, allowing construction beyond the edge of the asteroid.

What You Can Build on an Asteroid

Building in Zero Atmosphere

• All structures must be enclosed with walls and roofs
• Colonists outside require vac suits or spacer armor
• Use sun lamps and hydroponics to grow food indoors

You can also bring soil using biosculpting or modded methods if you want traditional farming inside domes.

Utilities and Defenses

• Power: Use solar or nuclear (no wind in space)
• Heat: Heaters are essential, especially during eclipse-style events
• Oxygen: Maintain with air recyclers or oxygen generators
• Raids: Drop pods and mech raids still occur, even in orbit

Some raids may land inside your base, so set up interior killboxes or turrets. Others land outside, where you can channel them through airlocks and traps.

Using Asteroids as Permanent Bases

Many players are transforming asteroids into resource outposts or mechanitor hubs. These locations are perfect for:

• Deep mining operations
• Space farms or gene factories
• Drug labs or crafting stations

You can link asteroid bases with your grav ship or shuttles, using them as logistics hubs. Shuttles allow travel between settlements without destroying the map like grav ships.

Tips for Managing Your Asteroid Colony

• Grav anchors must remain intact when you leave, or the entire map will be deleted
• You can place multiple grav anchors on moons, asteroids, and planets
• Day/night cycles exist, depending on whether the planet blocks the sun
• Space flares don’t affect asteroid maps, unlike on planets
• Build airlocks with double doors to minimize air loss

Some players are turning their asteroids into military HQs, storing gear, training squads, or launching mercenary raids.

Final Blurb

Asteroid colonies in RimWorld: Odyssey are one of the best ways to take control of your playthrough. You can mine, build, raid, and explore without being tied down to a planet full of yaks and alpacas. Be sure to remember to pack air, heat, and armor though, because your colonists will freeze, suffocate, or get attacked by drop pod raiders if you're careless.

FAQ

Q: Can you build a base on an asteroid in RimWorld Odyssey?

Yes, using a grav anchor and grav ship.

Q: How do you build on the edge of an asteroid?

Use heavy bridges to extend past the rock’s edge.

Q: Do raids happen on asteroids?

Yes. Drop pods and mech raids can still target your base.

Q: Do you need air and heat?

Yes. Asteroids have no atmosphere. Use life support systems.

Q: Can you return to the asteroid after leaving?

Yes, as long as a grav anchor remains intact on the tile.

Q: Can you grow crops on asteroids?

Yes, inside sealed rooms using sun lamps and hydroponics.

Q: Do solar flares affect asteroid bases?

No. They don’t shut down power or oxygen systems in space.

Q: What gear do colonists need outside the ship?

Vac suits or spacer armor are required when outside in space.

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