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Trappist

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Trappist

Sirrah · Published by Sirrah

Very Positive — 90% positive (73 reviews) · 14 achievements

Last updated 28 Sept 2026

Welcome to Trappist-1, 40.7 light-years from Earth. Fly your Ark, a colossal spaceship and mobile base. Explore the solar system and establish thriving colonies. Uncover the mysteries of Trappist in this story-driven colony builder.

DJCTQ lFull Controller Support

£12.49

Lowest price we've ever recorded

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Price history

4 Sept 2026Lowest: £12.49 · Highest: £12.497 Oct 2026

Indie, Simulation, Strategy · 2024 · More £5 - £15 games

Embark on a story-driven journey to establish colonies on Trappist-1. Fly your Ark, a mobile base, as you explore the solar system and uncover secrets in this unique simulation experience from Sirrah.

About this game

As soon as humanity had the means we sent out an interstellar colony ship. Its design was basic but elegant. And it made it all 40.7 light-years to Trappist-1.

— Ship data files


On arrival at Trappist-1 you control the Ark. A large spaceship/movable colony and trading hub for your exploration of Trappist-1.

Trappist is a story-driven colony builder with resource management in the Trappist-1 solar system, and a focus on care-free building and story.

It's easy to play and respectful of your time. You'll create and grow multiple colonies in the Trappist-1 solar system, meet new alien friends and explore the mysteries of Trappist.

Trappist is fully playable from beginning to end and is under active development with more stories, colonies and improvements coming.

Explore the Trappist-1 solar system

Fly through the Trappist-1 solar system and survey each planet to find the best locations for your colonies.

Discover and excavate alien artifacts hidden in the system and uncover the true purpose of Trappist-1.

Build your colonies

Build colonies on the planets and moons of Trappist-1. Each colony has distinct resources and buildings that are necessary for success.

Fill your cargo ships with the extracted resources and fly them to your manufacturing or population centers. Create automated trading routes for stable production chains across your colonies.

Fly your Ark as a mobile colony or place it strategically as your central trading hub.

Current features

  • Relaxing gameplay
  • Freely explore the Trappist-1 solar system
  • Meaningful progress even in short game sessions
  • Multiple storylets woven into the main story line about the nature of Trappist-1
  • 10-15 hours or more to finish all current stories
  • 6 distinct colony sites spread over the Ark, two planets, and two moons
  • More than 50 unique buildings
  • Over two dozen construction and consumption resources
  • Replace your workforce with robots
  • Place buildings on a grid or go gridless at the flip of a switch!
  • No money and no road placement, just base building without unnecessary distractions
  • Automated trade routes between your colonies and the Ark
  • Quick to start and no loading screens when switching between colonies
  • Cheat codes and console commands
  • (Skippable) tutorials to explain the controls and game play
  • Different starting conditions. Including a New Game+ where you can start a new game and continue with your customized Ark from a completed game.

Planned features and continued development

These are some of the features I hope to implement:

  • More colonizable planets
  • More aliens
  • More research projects
  • Improved models and sound effects

Trappist is under active development. But as a solo developer I can't guarantee everything will be implemented, or will be implemented to an extent you might want or expect. I recommend you consider purchasing this game based on its current state alone.

Controls

  • Keyboard and mouse
  • Left-click to select, right-click to give orders
  • Move the camera with wasd or arrow keys, moving the mouse to the screen edges or click-and-drag
  • Touchscreen, including drag and pinch-to-zoom
  • Tutorial and documentation are available from within the game
  • All controls can be configured in the options menu

System Requirements

Will my PC run this? →

Minimum

Minimum:
  • Requires a 64-bit processor and operating system
  • OS *: Windows 7
  • Processor: Intel Core 2 Duo or AMD Athlon 64
  • Memory: 4 GB RAM
  • Graphics: Intel HD Graphics 4000 (Low Quality) or Intel HD Graphics 620 (Medium Quality)
  • DirectX: Version 11
  • Storage: 1 GB available space

Recommended

Recommended:
  • Requires a 64-bit processor and operating system
  • OS: Windows 10 or 11
  • Processor: Intel Core i5 or AMD Ryzen 3
  • Memory: 8 GB RAM
  • Graphics: Any dedicated GPU
  • DirectX: Version 12
  • Storage: 1 GB available space

Supported Languages

English

Latest news

  • AnnouncementsOfficial

    Celebrate spring at Trappist-1 with the Spring Sale!

    Finally, it is spring time again! But, if Earth's sunshine isn't convincing enough, try a different star. Maybe Trappist-1, a friendly red dwarf, with a couple of habitable looking planets. {STEAM_CLAN_IMAGE}/44883835/8e2fd0d24665cc4c25cd666bc316edb19e053248.png Or try out the free demo. Don't worry, you can take your save games into the full game! {STEAM_CLAN_IMAGE}/44883835/6c85e25f0d51c51029b07d2adb12e42f04a185c9.gif
    Read full article on Community Announcements (Sirrah)
  • AnnouncementsOfficial

    UX improvements, multi-monitor support and speed up text animations

    This update brings various UX improvements. Each improvement by itself might seem minor, but they do add up! The trade route lines are now clickable. If you want to adjust a trade route, or locate the corresponding cargo ship, you can now click on any of the trade routes while you're zoomed out in space. Many of you have requested improvements to the trade routes and this won't be the last of the improvements. And I hope this will help while I continue working on future improvements. You can now configure how the game behaves when the application loses focus. The Options menu now has a Run in background setting. I leave this at the default "Never", so the game doesn't overheat my laptop when I'm not playing. But if you regularly open a browser or switch to a second screen in a multi-monitor setup, you might prefer: "When not paused", "When not in main menu" or "Always". A second new setting is Dialog speed. When set to "Fast" the typewriter effect on incoming messages will be nearly instant. Finally, I've tweaked the camera so that after you go back into space from a colony, the camera won't jump to that planet, if the colony is already visible on the screen. The demo receives the same updates as the main game build, and you can continue your save game from the demo in the regular game. Check out the fixes and enjoy! The changelog for v1.0.17: Clicking a Trade Route now selects the corresponding Cargo Ship, even if the ship is out of sight or on a colony. When returning to space from a colony, don't jump the camera to that planet if the colony we left is already clearly visible on the screen. Fix the line length under the colony map label after loading a save game with specific conditions. Minor performance improvement by not iterating over non-existing child emitters when starting or stopping particle systems. At game start, don't automatically try to resume from an unsupported save file. This is mainly for my own testing as most save files from release builds are ...
    Read full article on Community Announcements (Sirrah)
  • Patch NotesOfficial

    Small bug fix for Storage Depots

    This is just a quick bug fix. The "optimizations" from last week caused an occasional (non fatal) exception when Storage Depots tried to determine the priority of factories to distribute and pickup goods. That should be fixed with this patch. This update also fixes some instances were the cargo drone was unable to plot a path to a building. This would result in the occasional immediate delivery to or pickup from e.g. the Coffee Roaster. The changelog for v1.0.16: Fix resource pickup issues around several buildings. Fix some issues with the target selection for cargo drones.
    Read full article on Community Announcements (Sirrah)
  • AnnouncementsOfficial

    Improvements to build system and declumped hud markers

    You might have seen the news about the security exploit in games built with Unity. Both Steam and Windows have measures in place to ward off most of the danger, but each Unity game should be patched, including Trappist. The markers for colonies and cargo ships at the edge of the screen used to clump together in the corners. Now they are better spread out which makes it easier to click on the right marker. Some recent feedback pointed out issues in building placement. This update addresses a bunch of these and I expect the building placement to feel much better now: The collider of the Storage Depot has been fixed so these can be placed side-by-side now. The size of the Automated Storage Depot has been adjusted, so it's still placed on the grid after rotating. Minor fixes to the navmesh and cargo drone path finding. The default keys for smooth rotation are now 'z' and 'x'. The smooth rotation speed has been increased. The "stickiness" of the building placeholder has been reduced. In most city builders, the building placeholder will always be directly under the cursor. In Trappist, the placeholder collides against other buildings, which feels slightly more "physical" and "realistic" to me. Did you know that you can push cargo ships with the building placeholder? I've also fixed the quality of the building outlines and removed a small stutter when the outline first appears for a building type. And there are a number of other minor performance improvements to smooth out the performance. The demo receives the same updates as the main game build. Check out the fixes and enjoy! The changelog for v1.0.15: Upgrade to Unity 6000.0.60f2. Fix security issue CVE-2025-59489 included in latest version of Unity. Fixes for various navmesh issues included in latest version of Unity. Adjust positioning of markers for off-screen ships and colonies to not clump together as much. The camera now zooms in, instead of out, when you click the indicator of a selected cargo ship a second time....
    Read full article on Community Announcements (Sirrah)
  • AnnouncementsOfficial

    Improved visuals, camera movement and more fixes

    This update has some smaller fixes, but some of these might be very noticeable. First is that HDR rendering is now enabled in Unity's URP rendering pipeline. This doesn't enable HDR output, but it does result in better VFX, including for emissive materials used on some buildings, lava and the Trappist-1 star. Overall the camera controls should feel less janky. Some tweaks will be most noticeable for those playing at 120 fps or more. The keybindings to continue building (hold shift) and to toggle the grid (hold ctrl) can now be modified. If the defaults don't apply automatically you can use "Options menu -> Keybindings -> Restore Defaults" to reset all keybindings to the new defaults. I've changed the "rotate" keybinding to "x" and "shift+x" to better match "rotate in steps" ("r" and "shift+r"). This is less awkward than the original "ctrl+shift+r". But on writing this changelog, I realize it would have been better to change it to "z" and "x" instead. I'll change that in the next update, and you can modify that yourself in the Options menu. Do you prefer building on a grid or in free mode with free rotation? And thank you all for your feedback, bug reports and reviews. It's great to hear from anyone playing Trappist! The changelog for v1.0.14: Enable HDR rendering. This doesn't enable HDR output but does improve various visual effects for e.g. lava, Trappist-1 and various buildings. Fix the consumption rate for Wheat in various tooltips. Improve camera movement and zoom controls when the game runs at high fps (> 120 fps). Prevent camera zoom going out of control when entering the main menu while zooming in or out. Don't unintentionally zoom the camera when starting to track a cargo ship or opening the construction menu on the Ark. Don't store the active camera rotation speed in save games. Allow keybinding for "continue placing building" (hold shift) to be modified. Allow keybinding to temporarily toggle the grid while placing buildings (hold ctrl) to be modified. Ch...
    Read full article on Community Announcements (Sirrah)

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