Universe Sandbox Legacy

Universe Sandbox Legacy

Giant Army · 2011 · Simulation, Sandbox, Space, Physics, Science

PC
Mostly Positive79% · 2,26815playing now

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Eneba
Eneba
Standard Edition · Steam
$19.11
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Gameseal
Gameseal
Standard Edition · Steam
$19.79
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Screenshots

About Universe Sandbox Legacy

✦ AI summary

Build and destroy entire solar systems in real-time using authentic physics and real astronomical data. Create black holes, collide galaxies, and manipulate gravity with intuitive tools that let you reshape the cosmos itself, then share your creations with friends.

http://store.steampowered.com/app/230290/

Create and destroy on a scale you've never imagined with the ultimate space simulator.

Harness the power to create black holes, collide galaxies, and manipulate gravity with just a few clicks. Inspired by the software astronomers use to unlock the mysteries of our universe, never before has astronomy been so interactive or so much fun.

Spawn a massive moon to tear apart Saturn’s rings or launch a rogue star to rip the planets from their orbits around our sun. After unleashing catastrophic destruction, create your own solar system and share it with friends.

Key Features

  • Interactive, real-time, n-body gravity simulator
  • Change any property of any object at any time
  • Real physics, real data, real units, real science
  • Compare the objects in any simulation with chart mode
  • Supports anaglyphic 3D glasses and 3D DLP televisions
  • Built in tutorials and step-by-step activities
  • Includes 70+ simulations both real and fantastical
  • Extensive editing and creation tools make it easy to build your own simulations

What Steam players say

Recent verbatim reviews from Steam — separate from playze.io community reviews below.

Not recommended Feb 18, 2026
I could've sworm I owned this game but convinced myself that I must have refunded it so I added the one ont he store to my wishlist only for me to find it in my library. What a disgusting thing you've done.
11 found this helpful
Not recommended May 30, 2026
Scum ♥♥♥♥ developers that delisted their game and decided to re-release it as the same title with updates for double the price. If it was universe sandbox 2 that would be one thing, this is literally the same game with the fixes they should have maintained from the beginning. Pirate it off any site that uploads Gog games
3 found this helpful
Not recommended Feb 21, 2026
Universe Sandbox Legacy is genuinely fun for what it is — a lightweight space physics sandbox where you can do things like make Mercury half the mass of the Sun and watch it drag Earth out of orbit, or just sit back and let asteroids wreak havoc on the solar system. It runs surprisingly well even on modest hardware and scratches that itch for anyone curious about astronomy or orbital mechanics. That said, it's hard to ignore how the developer handled this title: they essentially abandoned it, rebranded it as 'Legacy,' and launched a sequel under the original name with no discount or compensation for early supporters. The game itself is worth a few hours of fun, but the sequel (now just called Universe Sandbox) is objectively better in every way. If you don't already own this, skip it and buy the current version instead — this one's a historical curiosity at this point.
2 found this helpful
Recommended Apr 27, 2026
OGs will know https://www.youtube.com/watch?v=jItnCGRsMjw nuff said
1 found this helpful
Recommended Feb 26, 2026
No goals or direction. It started by throwing planets into stars and ended by leaving my PC on for a full real year for one achievement. Yes. A year. Real time. It’s basically a physics sandbox for people who enjoy breaking the universe for fun. If you need structure, you’ll hate it. If you’re curious, you’ll lose hours. Or, apparently, a year.
1 found this helpful
Recommended Apr 18, 2026
Very sad they scraped this version and didn't give original supporters anything.

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