Ver.2026-08-18
In-Game Manual The in-game manual has been overhauled to cover everything from the controls to reading your orbit. The same manual opens from both the Mission Control Center and…
Keplerian Space Discovery
Travel through the solar system in your own spaceship! The motion of each celestial body is accurately reproduced by the Kepler equation.
SimulationEarly Access
About This Game
Keplerian Space Discovery is a realistic spaceship trajectory simulator game.
Our solar system is built to scale and rendered with lifelike graphics.
Furthermore, the motion of each celestial body is precisely simulated using Kepler's laws.
Players can construct their own rocket by assembling various components.
Fly Me to the Moon
First, let's go to the moon, the moon.
That's one big step for us.
No rabbits.
Video Policy
The game can be streamed or have videos posted without prior permission, whether you are an individual or a company.
There are no restrictions on monetization or which parts of the game you can showcase.
Community Activity
Keplerian Space DiscoverySteam announcement- Keplerian Space DiscoverySteam announcement
Monthly Report July 2026
Thank you for your continued support of “Keplerian Space Discovery.” Here is an update on our progress in July and our goals for August. July Progress We’ve implemented detailed…
- Keplerian Space DiscoverySteam patch notes
Ver2026-07-28:Hotfix
・Fixed an issue where the game became unstable after launch. ・Corrected a spelling error.
- Keplerian Space DiscoverySteam announcement
Ver.2026-07-20 - "The Eagle has landed"
Lunar Landing Today, July 20, 2026, marks the anniversary of Apollo 11’s historic first human landing on the Moon in 1969. To commemorate this event, we’ve made it possible for…
- Keplerian Space DiscoverySteam announcement
Monthly Report June 2026
Thank you for your continued support of “Keplerian Space Discovery.” Here’s an update on our progress in June and our goals for July. June Progress We released two updates in…
- Keplerian Space DiscoverySteam announcement
Ver.2026-06-28
Improved ocean rendering We've improved the way the ocean is rendered, making the area around the horizon look more natural. *Excluding the Tanegashima Space Center and the…
- Keplerian Space DiscoverySteam announcement
Ver.2026-06-13
Launch Physics Improvements The flight dynamics calculation during launch has been changed from a rotating reference frame to numerical integration in an inertial reference…
- Keplerian Space DiscoverySteam announcement
Monthly Report May 2026
Thank you for your continued support of “Keplerian Space Discovery.” Here is an update on our progress in May and our goals for June. May Progress One major change we made was…