- Best seeds: Community favorites Banjo and Sugon offer close cities and open terrain.
- Seed impact is limited: The developer confirms seeds matter less than difficulty settings.
- Very hard mode: High mountain & water settings make some seeds noticeably more punishing.
- What to look for: Flat land between cities, ample ore, and no blocking cliffs or seas.
- Terrain planning tips: Landmark towers and spread-out depots make any map easier.
How Seeds Work in Plan B: Terraform
A map seed determines the layout of your planet in Plan B: Terraform: where cities spawn, where ore patches sit, and how much water and mountainous terrain you must work around. Before hunting for the best seeds, it helps to understand what a seed actually changes, and what it does not.
According to Gaddy Games (the developer) in the Steam community discussion on seeds, the seed alone won't change the difficulty that much, unless you play on very hard (high mountain & water), where some seeds might be more punitive. In other words: on normal settings, seed choice is mostly about convenience and aesthetics, not raw survivability.
Video Highlights:
- Spread multiple Supply Centers across a city instead of forcing one hub to do everything.
- Build depots as close as possible to whatever they are supplying to shorten delivery routes.
- Surround mining pads with extractors and MK2 pads for a build-it-and-forget-it drone network.
- Use cheap concrete Landmark Towers to mark key zones so you can find them again when zoomed out.
Changing certain settings, such as resource amount, may not affect map generation much. Focus your effort on the seed itself and the mountain/water difficulty sliders.
Best Seeds Recommended by Players
The community has tested a handful of seeds and shared the standouts. Both recommendations below come from player reports on normal difficulty settings.
| Seed / Planet Name | Cities Layout | Terrain Quality | Resource Notes | Player Rating |
|---|---|---|---|---|
| Banjo | All cities close together | No mountains or sea between cities, flat central land | Plenty of Fluorite ore patches right on the ice | ★★★★★ |
| Sugon | All cities close together | No blocking mountains or sea | Solid resource spread | ★★★★☆ |
Banjo - Community Favorite
- Huge flat land in the middle between cities for your main factory line after water rises
- No cliffs or rivers to route around
- Fluorite ore on the ice, easy early mining
- Memorable name, easy to share with friends
Sugon - Reliable Alternative
- Close city cluster cuts rail commute times
- Clean terrain with no sea crossings
- Great for players who want a second smooth run
The standout feature of Banjo is the large, obstacle-free central landmass. Once ocean levels rise, that central plain becomes the ideal site for a sprawling main factory line with no cliffs or rivers in the way.
What Makes a Good Seed
Not every player wants the same thing from a planet. Use this checklist of traits when evaluating any seed you roll.
| Trait | Why It Matters | Priority |
|---|---|---|
| Close cities | Shorter rail lines, faster city growth loops | High |
| Flat land between cities | Room for main factory lines after water rises | High |
| Fluorite near start | Smooth early tech progression | Medium |
| No sea between cities | Avoids late-game bridging headaches | Medium |
| Few mountains | Less terraforming effort on very hard mode | Situational |
Start a New Game
Enter your chosen seed (such as Banjo or Sugon) on the new planet screen before generating.
Set Difficulty First
Confirm normal settings unless you deliberately want high mountain & water, which makes seed choice far more important.
Zoom Out and Survey
Check city placement, central landmass, and nearby ore patches before committing to a build plan.
Mark Key Zones
Drop cheap concrete Landmark Towers at mining areas, train yards, and factory sites so you can navigate back to them quickly.
Reroll If Needed
If cities are split by mountains or sea and you're on very hard, reroll, the seed penalty compounds with harsh settings.
On very hard (high mountain & water), the developer notes some seeds are more punitive. Test the map before investing hours into rail infrastructure.
Playing Any Seed Efficiently
A great seed helps, but smart logistics carry any map. These tactics, proven across community playthroughs, turn even a mediocre layout into a smooth operation.
| Tactic | How to Apply | Benefit |
|---|---|---|
| Multiple Supply Centers | Place one per production type near its consumers | Shorter delivery paths, less rail congestion |
| Depot placement | Build as close as possible to the target building | Faster supply cycles |
| Extractor rings | Surround a mining pad with extractors plus MK2 pads | Drone "symphony" moves ore without trains |
| City waste control | Add trains to haul waste; middle-click clears a pad's backlog | Keeps cities growing |
| Landmark Towers | Concrete-only towers at key sites | Easy navigation when zoomed out |
Once you unlock MK2 pads, surround your central pad with extractors and MK2 pads. Drones distribute ore automatically, and the setup lasts a long time before you need to return and rebuild.
New Planet Startup Checklist:
- Enter a tested seed such as Banjo or Sugon
- Confirm difficulty settings before generating
- Survey city positions and central terrain
- Place multiple Supply Centers from the start
- Mark mining and factory zones with Landmark Towers
FAQ
Q: Do Plan B: Terraform best seeds really change the difficulty?
Not much on normal settings. The developer, Gaddy Games, has stated the seed won't change difficulty significantly unless you play on very hard (high mountain & water), where some seeds may be more punitive.
Q: What is the single best seed players recommend?
Banjo is the community favorite. All cities are close with no mountains or sea between them, and there is a huge flat central area perfect for a main factory line after water rises, plus Fluorite ore on the ice.
Q: Does changing settings like resource amount change the map generation?
Player testing suggests some settings, such as resource amount, may not affect map generation much. The mountain and water difficulty sliders are what interact most strongly with the seed.
Q: How can I make a bad seed more playable?
Use multiple Supply Centers near their consumers, ring mining pads with extractors and MK2 pads for drone logistics, and place concrete Landmark Towers to keep navigation simple when zoomed out.