Screenshots
Watch trailer on Steam ↗Orbital Physics Simulator
Nathan Schmitt · Published by Blue Screen Studios
Positive — 89% positive (19 reviews) · 11 achievements
Last updated 28 Sept 2026
Master physics in this hardcore orbital simulator where Einstein’s theories come to life. Plot trajectories and manipulate spacetime via general relativity, time dilation, and length contraction. Command your starship, outrun time, and explore a universe governed by real physics.
Indie, Simulation, Free To Play · 2026 · More free games
About this game
A realistic orbital mechanics sandbox set entirely within our solar system, governed strictly by real-world Newtonian physics and Einstein’s theories of relativity.
The simulation bypasses launch sequences and atmospheric escapes, placing your craft directly into an established Earth orbit. From this starting point, operation focuses entirely on orbital maneuvering, trajectory calculation, and navigation.
Core Mechanics & Navigation
Interplanetary transit relies entirely on directional thrust. You can not rely on the autopilot if you want to progress. Instead, you must manually rotate the craft to thrust at specific angles to alter your trajectory.
To travel between planets, you change your course by timing these manual burns to account for relative orbital velocities and gravitational influences. Reaching destinations like Mars or Jupiter requires precise rotation and execution of insertion burns and gravity assists, where your thrust angle dictates your final path.
Relativistic Physics & Visual Distortion
The engine actively simulates the physical effects of near-light-speed travel by dynamically calculating time dilation, length contraction, and relativistic aberration based on your velocity. Time dilation is tracked via synchronized readouts comparing your onboard ship clock with external coordinate time, mapping how seconds for you equal months or years in the solar system. Mechanically, the universe compresses along your vector of travel, while the engine calculates light aberration to shift and bunch your field of view forward.
System Requirements
Will my PC run this? →Minimum
- Requires a 64-bit processor and operating system
- OS: Windows 10/11 64-Bit
- Processor: Intel i3-6100 / Ryzen 3 1200
- Memory: 4 GB RAM
- Graphics: OpenGL 4.5 compatible, 1GB VRAM
- Storage: 250 MB available space
- Sound Card: Not Required
- VR Support: Not Supported
Recommended
- Requires a 64-bit processor and operating system
- OS: Windows 10/11 64-Bit
- Processor: Intel i5-8400 / Ryzen 5 2600
- Memory: 8 GB RAM
- Graphics: GTX 1060 / RX 580, 2GB VRAM
- Storage: 250 MB available space
- Sound Card: Not Required
- VR Support: Not Supported
Supported Languages
Latest news
Patch NotesOfficial
V1.0.1 - The GUI Update
UI & Visual OverhaulDynamic GUI: Replaced older bitmap fonts with a native, high-resolution interface across all primary panels. Text elements are now significantly crisper and easier to read at all resolutions.Polished Surfaces: All menus, panels, and readouts have been rebuilt to match the new glass UI style, with consistent spacing, typography, and visual weight throughout.Glass Panels: Guide, Discoveries, and Settings windows now use a frosted glass rendering effect with real-time background blur.Note: The main game logo and select legacy text elements will remain as bitmap graphics for now.DiscoveriesRotating Planet Previews: Planet and moon detail views now display a live, slowly rotating 3D preview of the body, rendered in real time using the full surface shader including diffuse, normal, specular, and night-side textures.Atmosphere Visualization: Bodies with atmospheres now display a rendered atmosphere shell in the preview, showing the correct atmospheric color, density, and scattering. A new atmosphere composition chart shows the breakdown of major atmospheric gases at a glance.Atmosphere Info Panel: Detailed atmospheric data is now shown alongside the preview, including shell scale, density, and cloud coverage where applicable.New FeaturesSettings Save & Load: All settings; shader parameters, mouse controls, and display preferences; are now saved automatically to Resources/Settings/settings.ini and restored on every launch. No more re-tuning after restarting.Settings Menu: A fully redesigned settings menu lets you tune shader parameters, mouse controls, and display preferences without restarting.Shader Presets: Four named presets: Default, Minimal, Deep Space, and Warm Glow, let you switch between visual styles instantly. Each section also has individual Save and Reset to Defaults buttons.Orbit Ring Visibility: Planet orbit rings now hide automatically when the camera enters that body's sphere of influence, reducing clutter during close approaches. Rings ...Read full article on Community Announcements (IBXCODECAT)
