About the Game
Transform a Barren World into a Thriving Planet
Plan B: Terraform is a calm and contemplative sci-fi simulation game set in a near future where humanity must look beyond Earth for survival. Your mission: shape a newly discovered planet into a habitable world. Explore a vast, hex-based terrain with over a million tiles and harness a full ecosystem simulation.
Shape Climate, Water, and Life
Raise global temperatures with greenhouse gas generators, unlock underground ice to form flowing rivers and vast oceans, and restore vegetation across the land. Experience dynamic weather systems, including evaporation, wind patterns, and rainfall. Turn a lifeless rock into a living world covered in forests, rivers, and oceans.
Build Supply Chains and Grow Cities
Extract minerals, manufacture goods, and move them with trucks, trains, drones, and ships. Establish automated supply lines to support expanding cities, transforming small outposts into thriving metropolises with populations in the millions. Every stage of growth depends on your ability to manage logistics, optimize infrastructure, and keep automation running smoothly.
Screenshots
7 images
Version Information
Steam Patch Notes
Official update history
Hi
Here is a small 1.0.6 update. It mainly fixes a serious issue we had missed: clouds were no longer slowed down by mountains. This update restores the intended behavior: clouds now produce much more rain when passing over mountains (so they lose their water and disappear faster).
Please note: some areas “behind” mountains, depending on the wind direction, may turn back into desert. As a result, some vegetation and farm fields might die. If you’d rather avoid this, we’ve created a Steam branch so you can keep playing with 1.0.5: go to the game’s Steam properties, open the Betas tab, and select the "v1.0.5_before_clouds_fix" branch.
Now for other news: we can confirm we are working on something nice for Plan B: Terraform, but it’s still too early to share more details, sorry!
Also, Plan B: Terraform has been nominated for the Pégases (French video game awards) in the "Best Technological Innovation" category. We’ll know the results tomorrow, on March 5th! 🤞
To stay updated (no spam, ping only for new EA launches or releases):
- Discord: https://discord.com/invite/EGZuBNXGdt
- Mailing list: https://mailchi.mp/4f96adb7ac89/gaddy-games
Plan B - v1.0.6 build 1260
Bug fixes:
Fix clouds that were not slowed by mountains anymore
Fix & improve water texture update (performances & refresh)
Global Stats: fix values of Harvest / Field seeds / Supply center items
Global Stats: fix columns with when UI scaling
Fix stats on custom UI scale
Minor:
Update localisation. Fix issue with FPS target tooltip, and with credits in traditional chinese.
Plan B - v1.0.6 build 1262 HOTFIX (2026-03-12)
Bug fixes:
fix a freeze when reloading with a newly created mod
Here comes version 1.0.4!
Quite a lot of features in this update, mainly the long-requested global production screen, and a much better visualization of the map’s elevation, which should greatly help with water management.
There’s also a revamped city expansion algorithm, automatic recomputing of train lines, a button to upgrade all selected depots at once, and another to instantly create the maximum number of trains a line can handle before becoming saturated.
It should be the last update for some time, as we’ve now cleared all the tasks we had planned (and many more we have added thanks to your feedbacks).
However, we still have big ideas for the game, that would change the game a lot. No announcement yet, but the design is nearly done, and now we are going to run some tests on the biggest changes.
Join the Discord to stay updated on development progress or to discuss the game. No spam, members are usually pinged only once every few years, for a new Early Access launch or a release.
Same for the mailing list : https://mailchi.mp/4f96adb7ac89/gaddy-games
[img src="{STEAM_CLAN_IMAGE}/43157461/cbb09bce3674af03a5be564002a3ff8389ae89a3.png"]
Plan B - v1.0.4 build 1237
Improvements:
- New global production screen (cf. new bottom-left button)
- Enhanced view: elevation lines every 20 m
- Selection stats: display current values for city supply/waste stats, with color coding
- New city expansion algorithm: never jump over a road/building if there are free slots. Can jump over a river occasionally. If no free slot, try to jump 1 hex, then 2, etc.
- Recompute all trains after building or destroying a rail, to try to find a better path (same for trucks)
- Depots: mass upgrade button (when multi-selected)
- Multi-selection improvements: add message “x items deleted”, drag stops, fix rotation of rail/road directions, open depot panel with E
- Added a “MAX: x” button on train lines to instantly set the max number of vehicles. Better calculation of the saturated vehicle number
- Item choice for transport lines: highlight items in range
- New modding functionalities (functions called after world generation and on each frame, new doc, default mod updated, initial vehicle count)
- Camera history now saves the zoom level
Balance:
- Double-click on a selection selects only depots/factories of the same item/recipe
- Farms: see the range of other farms when building. Fixed underground links
Bug fixes:
- Fixed various errors & freezes with copy-paste, drag & drop, and undo/redo, plus some improvements
- Fixed rails not refreshed after terrain elevation changes
- Fixed polar bears not on ice
- Prevent water achievement in creative mode
- Stops unloading: fixed depot order and improved performance
- Fixed achievement population stats (now shows global population instead of city population)
- Escape closes Info panel
- Fixed Info page not starting at page 0 after a new game, or not resetting after closing/reopening the panel
- Fixed rare cases of space-lift being built in areas very difficult to reach due to water level
- Do not (hidden spoil) at population condition if level 23 dialog has not yet happened
- Fixed bug with dead buildings when city size decreases
- Fixed bug with rectangle selection during missile animation
- Fixed bug with corrupted city tiles
Minor:
- Updated localization to/from Crowdin
- Spawn buildings slightly higher on steep slopes
- UI scale can now be set down to 50%
- Improved train info page image
- Rail building: do not close the item when cancelling a placement
- Dump removed from selection when copy-pasting
Here comes version 1.0.4!
Quite a lot of features in this update, mainly the long-requested global production screen, and a much better visualization of the map’s elevation, which should greatly help with water management.
There’s also a revamped city expansion algorithm, automatic recomputing of train lines, a button to upgrade all selected depots at once, and another to instantly create the maximum number of trains a line can handle before becoming saturated.
It should be the last update for some time, as we’ve now cleared all the tasks we had planned (and many more we have added thanks to your feedbacks).
However, we still have big ideas for the game, that would change the game a lot. No announcement yet, but the design is nearly done, and now we are going to run some tests on the biggest changes.
Join the Discord to stay updated on development progress or to discuss the game. No spam, members are usually pinged only once every few years, for a new Early Access launch or a release.
Same for the mailing list : https://mailchi.mp/4f96adb7ac89/gaddy-games
[img src="{STEAM_CLAN_IMAGE}/43157461/cbb09bce3674af03a5be564002a3ff8389ae89a3.png"]
Plan B - v1.0.4 build 1237
Improvements:
- New global production screen (cf. new bottom-left button)
- Enhanced view: elevation lines every 20 m
- Selection stats: display current values for city supply/waste stats, with color coding
- New city expansion algorithm: never jump over a road/building if there are free slots. Can jump over a river occasionally. If no free slot, try to jump 1 hex, then 2, etc.
- Recompute all trains after building or destroying a rail, to try to find a better path (same for trucks)
- Depots: mass upgrade button (when multi-selected)
- Multi-selection improvements: add message “x items deleted”, drag stops, fix rotation of rail/road directions, open depot panel with E
- Added a “MAX: x” button on train lines to instantly set the max number of vehicles. Better calculation of the saturated vehicle number
- Item choice for transport lines: highlight items in range
- New modding functionalities (functions called after world generation and on each frame, new doc, default mod updated, initial vehicle count)
- Camera history now saves the zoom level
Balance:
- Double-click on a selection selects only depots/factories of the same item/recipe
- Farms: see the range of other farms when building. Fixed underground links
Bug fixes:
- Fixed various errors & freezes with copy-paste, drag & drop, and undo/redo, plus some improvements
- Fixed rails not refreshed after terrain elevation changes
- Fixed polar bears not on ice
- Prevent water achievement in creative mode
- Stops unloading: fixed depot order and improved performance
- Fixed achievement population stats (now shows global population instead of city population)
- Escape closes Info panel
- Fixed Info page not starting at page 0 after a new game, or not resetting after closing/reopening the panel
- Fixed rare cases of space-lift being built in areas very difficult to reach due to water level
- Do not (hidden spoil) at population condition if level 23 dialog has not yet happened
- Fixed bug with dead buildings when city size decreases
- Fixed bug with rectangle selection during missile animation
- Fixed bug with corrupted city tiles
Minor:
- Updated localization to/from Crowdin
- Spawn buildings slightly higher on steep slopes
- UI scale can now be set down to 50%
- Improved train info page image
- Rail building: do not close the item when cancelling a placement
- Dump removed from selection when copy-pasting
This time it's a small update, released earlier than planned, to quickly include the important Unity fix for the "CVE-2025-59489 security vulnerability".
But there’s also a nice little improvement: when you select multiple depots or factories of the same type, you can now change their item or recipe all at once!
We’ve also been discussing ideas for a possible big future update or DLC. Nothing decided yet, but some very exciting concepts are on the table! If you'd like to participate in these early discussions, join our Discord and opt in for the Advisor role. We regularly ask for their input on upcoming ideas.
But don't hesitate to join anyway: other Discord members are usually pinged only once every few years, for a new EA launch or release. And there is also a mailing list, also only used for those rare occasions.
Plan B - v1.0.3 build 1221
Major improvements:
- Added the Item/Recipe set button on a multi-selection of similar depots or factories items. Same for Backup Supply option.
Improvements:
- Undo a drag keeps containers (behaves as a drag - cannot be used to duplicate containers)
Balance:
- Cursor visibility: a little bigger, outline wider. Cursor build anim visible more often
- We can now click on minimap while building a road
Bugs fix:
- Updated Unity with its recent vulnerability fix
- Rectangle selection can go below the minimap
- Fixed rare issue with farms
- Cancelling a selection does not close an open item category build menu
Minor:
- Building error message delay set to 5s
- Fixed text spelling error
Here is a second update with a lot of urgent fixes and small improvements, but also some real gameplay additions ; especially the production stats of the current selection. Simply select a group of buildings and you'll see the total of what they can produce and consume (if there are enough depots to deliver/receive containers!).
We have also fixed and optimized several issues that improve performance, especially when zoomed out.
Plan B - v1.01 build 1211
Major improvements:
Display total max production/consumption of the current selection. 3 groups: factories/extractors/farms, cities (supply, waste, research center), vehicle lines.
Improvements:
Highlight items and recipes in range in the depots and factories selection panels
Improved performances in zoomed out views (especially in zoom 5, a lot)
Improved performances when zooming (sound optimisation)
Improved performances when multi-selecting, especially depots & farms
Double tab/alt to keep enhanced view
Modified some achievemnts so they show the progress in steam
Display all log in console, when F9 active
Bugs fix:
Added Ship info page
Multi selection: set an icon, and fixed dam pumps rotation & mirror
Fixed temperature refresh when loading a planet at 0°
Prevent drag buoys
Fixed issues with water simulation: it rains more over mountains, but not over underwater mountains anymore.
Fixed issue when building & dragging a factory before setting its recipe
Fixed that selection wasn't cancelled when starting a new rectangle selection
Fixed a bug that generated some ores (alu, sulfur) at a different position with the same seed, when generating a 2nd world a same session.
Minor:
Removed "DoNotShip" folder in build
The third main change is the highlight of items (and recipes) that are used in range, so you can find the one you need faster. In this example, fluorite and sulfur are highlighted on this depots pick screen, because it has in its range depots of fluorite, and factories with a recipe using fluorite and sulfur.
[img src="{STEAM_CLAN_IMAGE}/43157461/80fb0440de450c6741ab1d0c1a6b790b58272f99.png"]
And here is a detailed view of the selection stats, on a large area around a city:
[img src="{STEAM_CLAN_IMAGE}/43157461/048b9d76a2da346256b57ffef314120e7d0b83f1.png"]
Plan B - v1.01 build 1212 - Hotfix 2025-09-29
Fix issue with highlight of recipes
Here is a second update with a lot of urgent fixes and small improvements, but also some real gameplay additions ; especially the production stats of the current selection. Simply select a group of buildings and you'll see the total of what they can produce and consume (if there are enough depots to deliver/receive containers!).
We have also fixed and optimized several issues that improve performance, especially when zoomed out.
Plan B - v1.01 build 1211
Major improvements:
Display total max production/consumption of the current selection. 3 groups: factories/extractors/farms, cities (supply, waste, research center), vehicle lines.
Improvements:
Highlight items and recipes in range in the depots and factories selection panels
Improved performances in zoomed out views (especially in zoom 5, a lot)
Improved performances when zooming (sound optimisation)
Improved performances when multi-selecting, especially depots & farms
Double tab/alt to keep enhanced view
Modified some achievemnts so they show the progress in steam
Display all log in console, when F9 active
Bugs fix:
Added Ship info page
Multi selection: set an icon, and fixed dam pumps rotation & mirror
Fixed temperature refresh when loading a planet at 0°
Prevent drag buoys
Fixed issues with water simulation: it rains more over mountains, but not over underwater mountains anymore.
Fixed issue when building & dragging a factory before setting its recipe
Fixed that selection wasn't cancelled when starting a new rectangle selection
Fixed a bug that generated some ores (alu, sulfur) at a different position with the same seed, when generating a 2nd world a same session.
Minor:
Removed "DoNotShip" folder in build
The third main change is the highlight of items (and recipes) that are used in range, so you can find the one you need faster. In this example, fluorite and sulfur are highlighted on this depots pick screen, because it has in its range depots of fluorite, and factories with a recipe using fluorite and sulfur.
[img src="{STEAM_CLAN_IMAGE}/43157461/80fb0440de450c6741ab1d0c1a6b790b58272f99.png"]
And here is a detailed view of the selection stats, on a large area around a city:
[img src="{STEAM_CLAN_IMAGE}/43157461/048b9d76a2da346256b57ffef314120e7d0b83f1.png"]
Plan B - v1.01 build 1212 - Hotfix 2025-09-29
Fix issue with highlight of recipes
Thank you all for the amazing reception and support for the 1.0 release!
Initially, we planned to release just a small 1.0.1 patch with a few fixes and improvements. But thanks to all your great and pertinent feedback, the todo list quickly grew much larger :-)
So here’s the first update, including some of the most urgent improvements. More will follow soon!
Meanwhile, we’re also discussing the next big steps for Plan B… and we have some pretty exciting ideas in the works!
Plan B - v1.0.1 build 1192
Improvements:
Added a resize button to Info page
Terrain tool creates less mountains (only for slope > 35° instaed of 20° before)
Improved depots auto-priority system so no single containers are left alone on a mineral field
Added a counter to warnings icon
Balance:
Pumping Stations work with up to 50m of water (instead of 20)
Space lift not blocked by water
Bugs fix:
Fixed a crash some people had with the space elevator story event
Fixed issue that could make the level 18 (give nano tubes to space lift) instantly completed
Depots drones don't work if more than 50m of water
Animal mode: fix error when pressing a city/landmark shortcut
Fixed flooded warnings (2s for all)
Set the max number of cities to 15, with an error message (creative mode)
Fixed corrupted saves that were preventing to load any other save or create a new planet
Fixed farms range overlay when pressing CTRL key
Fixed landmark tower selection bugged sound
Fixed tooltip in launcher
Minor:
Improve a few texts
Clean memory when opening pause menu
Updated planet image in home & load screens
Updated loc (CN)
And for info, here is the list of hotfixes that were added in the days following the 1.0 releases:
Fixed memory leak when copying lot of items.
Eagle sound much less often
Cursor distance to trigger rectangle selection moved to lua, fix variable change in console
Auto recompute a flooded line path, when remove the flooded rails/roads.
Fixed an awful framerate drop in previous build - strange error about ambiant occlusion, no idea what happened...
Current Release
12627561
Uploaded Nov 25, 2023
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How to Install
Plan B Terraform.exe to play
Troubleshooting tips
• Run Redist/_CommonRedist installers if game won't start
• Add folder to Windows Defender exclusions
• Run as administrator
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Download Plan B: Terraform for PC with a direct link or via torrent. Get the full version of Plan B: Terraform for free. Plan B: Terraform is a Indie released by Gaddy Games.