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Perihelion
Perihelion lets you run your own rocket engine shop. Take over an abandoned desert airfield, design realistic, unique engines, then test them!

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Coming Soon To Early Access

The developers of this game intend to release as a work in progress, developing with the feedback of players.

Note: Games in Early Access are not complete and may or may not change further. If you are not excited to play this game in its current state, then you should wait to see if the game progresses further in development. Learn more

What the developers have to say:

Why Early Access?

“We chose to launch Perihelion into Early Access because we feel that it will shine the brightest light on the issues that we need to fix to make the game as fun as possible. Iterating on the game through Early Access will help us create a stronger base for the final release. We believe the best way to make a quality product is to put it in front of real people as early as possible.”

Approximately how long will this game be in Early Access?

“Our goal to release out of Early Access roughly by May 2027. ”

How is the full version planned to differ from the Early Access version?

“We plan for the full version of Perihelion to include Career Mode, Engine Export to other titles, Steam Workshop support, custom parts, updated models, further polished mechanics and other core components. We will make sure to inform the community if plans change.”

What is the current state of the Early Access version?

“The Early Access version currently has: The entire sandbox game loop, from planning to test firing, Full mathematical simulation, Failure modes, and Engine Export to Kitten Space Agency.”

Will the game be priced differently during and after Early Access?

“We have no plans to raise the price when we are out of Early Access. There may be an increase if enough further content is added after the release of 1.0.”

How are you planning on involving the Community in your development process?

“The community has direct access to us and can report any of their bugs on our official forum, and in our Discord server, both of which are linked on the store page.”
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About This Game

Build it, blow it up, and build it again

Perihelion lets you run your own rocket engine shop from the ground up. Take over an abandoned desert airfield and design realistic, unique engines. Test them (until you fly too close to the sun) while racing companies to land contracts from in-game aerospace companies. Or, you could just export it straight into your favorite space game and see it fly for yourself.

Make your company whatever you want it to be

Build ridiculous multi-meganewton heavy-lift engines, or weedy engines made just for small-satellite launchers. There’s no definitive answer, only what works. Size your own chambers, define your own nozzle cooling methods, pick a propellant combination, assemble turbopumps, optimize for a specific altitude, and more.

Compete to be the best

Coming next year as a part of the 1.0 release, be the best in the business and compete for lucrative, varied contracts. You decide what to do to win!

Export your engines to other games

Space games can feel limiting when the engine choices are predetermined, not what you want, and not optimal for the rocket you are looking to build. Perihelion's Engine Export feature, along with a standalone companion mod for each supported game, lets you be as creative as you like while also helping you design engines that are optimal for what you're trying to do.

System Requirements

    Minimum:
    • Requires a 64-bit processor and operating system
    • OS: Windows 10 64-bit
    • Processor: AMD Ryzen 5 1500X or Intel Core i5-8400
    • Memory: 8 GB RAM
    • Graphics: AMD Radeon 610M or equivalent
    • DirectX: Version 11
    • Storage: 2 GB available space
    Recommended:
    • Requires a 64-bit processor and operating system
    • OS: Windows 10 64-bit or Windows 11 64-bit
    • Processor: AMD Ryzen 5 3600 or superior
    • Memory: 16 GB RAM
    • Graphics: AMD Radeon RX 570 / NVIDIA GTX 780 or superior
    • Storage: 2 GB available space
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