OnOrbit is a virtual space lab for craft that lets you assemble and operate space hardware as if you were actually in space.
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Early Access Game

Get instant access and start playing; get involved with this game as it develops.

Note: This Early Access game is 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?

“SATSIM requires community involvement to steer its development direction.
Our software is in alpha testing stage at the moment, if you're interested in alpha testing the game, we'd love you to use the 'Contact Us' page at our website.”

Approximately how long will this game be in Early Access?

“24 months, our intention is to add up to 10 missions, one each month,”

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

“The full version will contain more missions, more components, more hardware, and different levels of functionality. It's also intended that more realism be injected into the graphics system of the game.”

What is the current state of the Early Access version?

“The early access contains one game loop and one mission. The goal is to assemble a demo satellite. It includes an assembly phase, where the player can use a sandbox to create any spacecraft they desire, a test phase where the craft is tested against the criteria required, and then a basic operation phase where the designed craft will use its ability to complete the mission.
It is complete and self contained game. Depending on your skill level, and how much you wish to investigate the game, the current game will take about 30 minutes to complete.”

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

“Early access will be offered at a big discount.
Early access keys will be honored as the game develops.”

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

“We will be looking for feedback on the game premise and bug reports against the existing build.
We will run a Discord server for players to communicate with us. We would like to know what sort of craft and missions to add next to SATSIM. We also aim to create a modding community, run competitions to add different hardware to the game. Finally, we'd like our community to help us decide what functionality to pursue in the next iteration.”
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About This Game

Welcome Spacefarer, Join us On Orbit!

Try our sandbox, simulator and strategy PC game on STEAM or EPIC Games store from August 2024.
Its a high fidelity, real world and near future space simulator, featuring real world space enginerring and the latest and greatest models from all your favourite space companies. Investigate and explore the ISS, Axiom space station, Artemis Lunar Gateway, Blue Origin's Orbital Reef, Tianggon and the ISS. Refuel and repair Hubble, Chandra, James Webb, Starlink satellites and the other on orbit craft. Fly the Sierra Dreamchaser, the Boeing Starliner, SpaceXs Dragon Then build out your own fleet to head out there

Gameplay - What's under the hood

Build and repair spacecraft on orbit

Using real world, and near future space hardware, build your own craft from the ground up. Go from the smallest craft, to the craziest design you can think of in sandbox mode.

Operate your craft to complete missions

Use robotic arms, fire thrusters, mate with docking ports, spin reaction wheels, deploy aerials, move solar panels, take camera shorts ... operate any and all of your spacecraft parts to complete your mission, but watch out, they don't all work as expected.

Harvest Space Junk for Profit and Space Karma

Is it a rare part, or worthless space rust? Bring them back to the station and strip them for IS$ or reverse engineer them for reuse. Be warned though, you may have collected more than you bargained for.

Build and rent space on your own space station

Climb in the rankings and get to build your own space station. Take it to Mars, Venus or beyond. Lucky enough to own your own station? Rent a docking port to other players , sell them power, fuel, air and water and help them get their smaller craft in orbit around other planet

Catch a lift to Venus, Mars and Beyond on the O/O Interplanetary Transport Cycler Network

Modellers and modders please visit us at http://onorbit.online/parts.html#content4-cq We're looking for captains for our existing stations around Earth, Venus and Mars.

System Requirements

    • Requires a 64-bit processor and operating system
    • OS: Windows 10
    • Processor: Intel Core i3
    • Memory: 4 GB RAM
    • Storage: 700 MB available space
    • Requires a 64-bit processor and operating system
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