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SpaceSim: Pale Blue Dot
Build rockets, launch payloads and explore the Solar System in a physics-based space simulation. Unlock parts through launch objectives, develop stations and planetary outposts, then discover orbital mechanics, astronomy and the light-bending gravity of a black hole.

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Features
Single-player
Family Sharing
Profile Features Limited 
Languages:
Interface Full Audio Subtitles
English ✔

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?

“SpaceSim: Pale Blue Dot combines rocket construction, launch objectives and space exploration. I am developing the game on my own, and I want player feedback to help refine how it explains a rocket's capabilities, how progression feels, and which missions and scientific experiments need more work. The release plan starts with a Steam Playtest before paid Early Access. Early Access will let me improve the playable game with the community before version 1.0.”

Approximately how long will this game be in Early Access?

“I currently expect Early Access to last roughly six months after the paid Early Access launch, with the aim of releasing version 1.0 during 2027. This is a working estimate, not a guaranteed release date. The schedule will depend on player feedback and the work needed on progression, saves, usability, balancing and performance. I will update this estimate and explain significant changes in Steam announcements.”

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

“For version 1.0, I plan to refine the rocket builder, mission progression, flight explanations and the connection between payload deliveries and orbital or surface infrastructure. My priorities include a clearer introduction, reliable saves and progression, better balancing, improved usability and accessibility, and stable performance on the advertised PC configurations. I may also expand missions and scientific experiments in response to player feedback. These are development intentions; the final scope may change.”

What is the current state of the Early Access version?

“The current development build lets you:

- Assemble modular rockets from engines, tanks, stages and payloads, then inspect mass, thrust, thrust-to-weight ratio and delta-v to assess the design.
- Explore the Louisiana coastal spaceport, follow a launch countdown from Mission Control, attempt launch objectives and unlock parts and reference blueprints.
- Choose payloads and work with orbital station and surface outpost systems. These delivery and progression systems are still being refined.
- Explore orbital and planetary destinations, follow guided scientific expeditions, and experiment with an interactive Schwarzschild black hole simulation.

The initial PC version is designed for Windows with keyboard and mouse. The spaceport is an artistic interpretation of a proposed Louisiana site; procedural scenery is not a surveyed reconstruction. Scientific explanations distinguish calculated or sourced information from illustrative and speculative elements.

The game is still in development: bugs, unfinished presentation, balancing issues and performance variations should be expected. I am continuing to test progression, save reliability and onboarding. The initial Steam Playtest will help establish the content and readiness of the first paid Early Access build. This answer describes the current development build and will be updated to describe the build available to buy before paid Early Access begins.”

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

“I plan to offer a lower base price during Early Access and increase it for the full version 1.0 release. The price may also rise during Early Access if substantial content and features are added. I will announce the initial price before paid Early Access launches and communicate planned increases in advance through Steam announcements. Please assess the value of the content available at the time of purchase.”

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

“I plan to use Steam Discussions to collect bug reports, questions and suggestions, and Steam announcements and patch notes to explain updates. The initial Playtest will focus on building and launching a first rocket, flight feedback, progression and performance across PC configurations. Player feedback will help me prioritize usability, balancing, missions and scientific explanations throughout Early Access. As a solo developer, I will use that feedback to set priorities and explain what I am working on.”
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About This Game

Build rockets. Reach new worlds. Discover the science of space.

SpaceSim: Pale Blue Dot is a single-player space simulation that brings together rocket building, spaceflight and astronomy. Design your own spacecraft, launch useful payloads, explore the Solar System and investigate the gravity of a black hole. Your journey starts with a small test rocket. What you learn and deliver opens the way to larger vehicles, orbital infrastructure and distant destinations.

A modeled spaceport on the Louisiana coast

Your space program has a home at Pelican Point, a coastal launch site modeled in 3D in Vermilion Parish, Louisiana. The setting brings together the High Bay, launch pads and towers, propellant facilities, roads, waterways and Mission Control overlooking the launches. Build in the hangar, send your vehicle to the pad and follow its ascent from the control room or the flight cameras.

The site draws on a conceptual coastal spaceport plan; building details, the control-room interior and its placement are interpretations for the game. You explore a simulated spaceport rather than a surveyed reconstruction of an operating facility.

Design a rocket for the mission

Step into the High Bay at the fictional Pelican Point launch site. Assemble fuel tanks, engines, boosters, decouplers, capsules, landing gear and payload fairings into a vehicle of your own. Compare mass, thrust and delta-v as your design takes shape. A lunar lander, an orbital launcher and a deep-space probe need different solutions: choose the parts, propulsion and cargo that suit the journey.

Read the flight check before committing to launch. It explains what your design can achieve and where it falls short. Refine the rocket, test another combination and turn the figures into a flight you can watch.

Launch, learn and unlock the next step

Follow your rocket from the pad and Mission Control. Reach the edge of space, work toward low Earth orbit, then design for lunar and Martian missions. Successful launch objectives unlock new parts and reference blueprints. You find the solution first; the blueprint becomes a reference after you complete the objective.

The campaign connects the hangar to the destinations. A stronger engine or a larger payload bay has a purpose in the next mission. Study the flight report, return to your design and prepare for the next launch.

Give every payload a purpose

Choose what goes inside your fairing or cargo bay: CubeSats, communications satellites, station modules, habitats, instruments, supplies and rovers. Payload size and mass count toward the vehicle's limits. A load that fits your mission must also fit the rocket carrying it.

Deliver modules for an orbital station, grow a satellite constellation, or send the equipment needed for an outpost on the Moon or Mars. The payload and progression systems track what you deliver and the goals you reach, connecting individual launches to a larger space program.

Explore orbital mechanics above the pale blue dot

Watch Earth's night side turn beneath you and the atmosphere glow at an orbital sunrise. Travel between destinations through the game's missions and journeys, with orbital mechanics and flight readouts giving context to what you see. Guided expeditions provide explanations; free flight lets you take your time and inspect the view.

From Earthrise to the outer planets

See Earth rise over the Moon's horizon and follow the campaign toward lunar and Mars landings. Each destination asks for a design that can reach it: enough delta-v, suitable landing equipment where required, and a payload suited to the place.

Continue to Jupiter and its Galilean moons, Saturn and its rings, and the journey beyond Neptune. Astronomy becomes something you can explore from a spacecraft: compare worlds, follow an expedition and linger beside a planetary horizon. Later chapters introduce speculative propulsion for the journey toward the nearest stars; these systems are identified as speculation within the game's science framework.

Investigate a black hole, ray by ray

Fly around a non-spinning black hole modeled with Schwarzschild gravity. Examine its shadow and accretion disk, follow the path of light and compare your clock with one far away. Switch light bending, gravitational shift and Doppler beaming on and off to see what each effect contributes.

Try a circular orbit, cut the engine and follow an infalling observer across the horizon. This part of the simulation turns relativity into an interactive experiment, with readouts and ray paths that help explain the changing view.

A space simulation with its assumptions visible

Planetary maps draw on NASA and USGS data. Computed physics, catalogue data, illustrative parameters and procedural detail have different roles, and the game keeps those distinctions visible. Orbital phases and presentation choices are not observations. Pelican Point is an imagined launch site, and its launches are simulated. The black hole model is non-spinning; later speculative engines do not represent technology available today.

Your journey at a glance

  • Build custom rockets and spacecraft from modular parts.

  • Check thrust, mass, delta-v and payload fit before launch.

  • Progress through launch objectives that unlock parts and blueprints.

  • Deliver satellites, station modules, habitats, supplies and rovers.

  • Explore Earth orbit, the Moon, Mars and the outer planets.

  • Follow guided astronomy expeditions or spend time in free flight.

  • Experiment with black hole gravity, light bending and clock rates.

  • Play on desktop with keyboard and mouse.

Add SpaceSim: Pale Blue Dot to your wishlist and prepare for your next launch.

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

Generative AI was used during development to create some ground textures, interface illustrations and Mission Control displays, as well as music, selected voice lines and sound effects. These assets are prepared in advance and included with the game. No generative AI content is produced during gameplay, and the game does not connect to an external AI service.

System Requirements

    Minimum:
    • OS: Windows 10 / 11 (64-bit)
    • Processor: Intel Core i5-8400 / AMD Ryzen 5 2600 (provisional)
    • Memory: 16 GB RAM
    • Graphics: NVIDIA GeForce RTX 2060, 6 GB VRAM, Vulkan support (provisional)
    • Storage: 4 GB available space
    • VR Support: No VR headset required. PC VR support is in development and has not yet been validated.
    • Additional Notes: Provisional desktop requirements for 1080p at reduced graphics settings, to be refined during Steam Playtest. Keyboard and mouse required.
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