Terraforming converts a captured or settled planet's type to match your homeworld type. A Lava player turns Desert worlds, Oceanic worlds, Gas Giants — whatever they grab — into Lava worlds; a Temperate player turns everything into Temperate. It's the slow, expensive way to make a foreign planet pull its weight in your empire.
Terraforming is run from the Resources view (Terraform layer).
| Changes? | |
|---|---|
| Planet type | ✅ Becomes your homeworld type. |
| Planet size | ❌ Stays the same. |
| Population | ❌ Stays the same — no penalty, no boost. |
| Buildings | ❌ Intact, including the Terraforming Command Center that ran the job. |
| Primary / secondary ore | ❌ The planet keeps the ores it had before terraforming. |
| Habitability & match bonuses | ✅ Once the type matches your homeworld, you start getting the +50% production and +50% science planet match bonus on every yield. |
This means terraforming doesn't replace a foreign world's ore — a Lava world full of Bezantium that you Temperate-ify will still produce Bezantium afterwards. The point is to put the match bonuses on top of that yield.
To terraform a planet you need three things:
Without all three, the project doesn't start ticking.
Terraforming is paid in your homeworld's Level 2 ore, drawn weekly from your empire stockpile:
| Homeworld type | Level 2 ore consumed |
|---|---|
| Lava | |
| Desert | |
| Temperate | |
| Oceanic | |
| Gas Giant | |
| Ice Giant |
Each planet under active terraforming consumes 1 unit of that ore per week. A full terraform takes 25 weeks, so the total cost per planet is 25 ore.
That ore comes out of your empire-wide stockpile, so running ten terraforms in parallel costs ten units per week — you need a serious refining base if you want to terraform an empire's worth of new colonies at once.
If a planet's terraforming is enabled but you don't have any of the right ore in stock, nothing happens that week — no progress, no consumption. The job pauses cleanly until you have ore again.
| Planet | Terraformable? |
|---|---|
| Lava, Desert, Temperate, Oceanic, Gas Giant, Ice Giant | ✅ Anything that isn't already your homeworld type. |
| Your homeworld type already | ❌ Nothing to convert — they already match. |
| Ringworld | ❌ Ringworlds are a separate end-game path, not a "planet" in the terraforming sense. |
| Ferion / destroyed planets | ❌ Special types, not terraformable. |
There's no step-by-step requirement — a Lava player can terraform an Ice Giant directly to Lava in one project. No need to go through intermediate types.
You can lose progress in two cases — and the ore you've already spent is gone:
Both are good arguments for terraforming only planets you have a serious chance of holding for the next half-year of game time.