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A Lithonaut in a yellow suit floating against a deep blue background, eyes lit on the visor

A spaceflight simulator. In development.

Lithobrake: Spaceflight Simulator. Coming
soon

Build a rocket. Fly it through a one-tenth-scale Solar System. Come down one way or another.

Status
In development
Launch
Holding
Engine
Custom-built
Co-op
Included

Glossary

Lithobraking

Noun. Stopping by hitting the ground. See also: recovery.

Lithobrake™ is a spaceflight simulator on its own custom engine. Build a rocket at Meridian, the space center, then fly it through the real Solar System at one-tenth scale.

The engine was written for this game, so craft and stations can get very large. Some flights end in orbit. The rest are lithobraking.

Coming soon. Early build. More to come.

In the game today

Features

Everything below runs in the current build. The pictures are drawn on the grid of the game's typeface, two screen pixels to a picture pixel.

  • 01 / 06

    Build anything

    Fly most of it.

    Parts from six makers, with symmetry, subassemblies and a craft library. Build as big as you like.

  • 02 / 06

    Real orbits

    The whole Solar System at one-tenth scale.

    Plan the maneuver, wait for the launch window, and warp time while you wait.

  • 03 / 06

    It breaks

    Every joint carries load, until one doesn't.

    Structures bend, break apart and burn up on reentry. Every piece that comes off becomes its own vessel.

  • 04 / 06

    Weather

    Simulated wind, rain and storms. Check the forecast.

    Every world with air has weather. Space has its own.

  • 05 / 06

    Co-op

    Fly with friends. One shared clock.

    Everyone flies in the same Solar System, from the same space center.

  • 06 / 06

    Scripting

    Flight computers, programmed in Lua.

    Write a program to fly the burn and stage for you, then send it to a probe out of reach.

A ringed giant planet seen from its night side, lit only at the limb

Rings
included.

A ringed giant, night side. In-game.

Crew

Lithonauts

They leave the capsule. Most come back.

Crew climb out on EVA, float, walk and carry cargo, and a helmet camera shows the view from inside the visor. The face on the visor is drawn in the game's own type.

  • EVA
  • Helmet camera
  • Cargo
  • Life support
A Lithonaut waving on EVA, a smiling face on the visor, stars behind
EVA. Waving.
A Lithonaut in a yellow suit on EVA with the sun behind, the brand mark and BRAKE on the visor
EVA. The sun, behind.
A small Lithonaut far from the sun in deep space
A long way from the capsule.

Conic
engine

Written for this game. Built to go big.

Lithobrake runs on CONIC, its own engine, made from scratch for spaceflight rather than borrowed from another kind of game. It is why you can build massive craft and stations, and keep a whole fleet flying.

  1. Massive craft

    Rockets with more parts than you will want to stage.

  2. Stations

    Dock module after module. The station keeps growing.

  3. Fleets

    Ships stay where you left them: in orbit, on the ground, or in pieces.

Milestones

Roadmap

Order, not dates.

The game is built in five milestones. Several are under way at once; the release waits for all of them.

  1. Milestone A: Foundation

    The engine, the interface and the simulation under everything.

    In progress
  2. Milestone B: First mission

    Build, launch, reach orbit, come home and save the game.

    In testing
  3. Milestone C: Lunar program

    Transfers, landings, docking, EVA and crews that stay out there.

    In testing
  4. Milestone D: Planets

    Other worlds, aircraft, rovers, stations, a career and mod tools.

    Started
  5. Milestone E: Release

    Performance, co-op over the internet, polish and accessibility.

    Holding

Asked, or expected

Questions

Pixel drawing of a rocket lifting off the pad at night

Launch news

Follow the build on YouTube and X, or leave an address for news of the store page and the launch.

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