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Universe Sandbox Legacy

Universe Sandbox Legacy

Create and destroy on a scale you’ve never imagined!

Released Apr 29, 2011 Developer Giant Army Platforms Windows SimulationSandboxSpacePhysicsScience
View on Steam ↗ Free (US · as of 2026-08-12)

What players say

Steam review score and the most-helpful voices, which may include critical ones. Score via Steam as of 2026-10-22 · quoted reviews as of 2026-10-15.

80.0%positive2,976 reviews
Recommended · 422 found this helpful

“When I say that I'd reccomend this game it's only to a small niche of people. Because I happen to fall in the niche I rather liked Universe Sandbox, though I can see where many people woud not. Universe Sandbox is pretty self explanatory in the title, its a astrophysics sandbox…”

— a player, Steam review · 16 hrs played
Recommended · 193 found this helpful

“Universe Sandbox is exactly what its name implies: a place for you to play around with astronomical bodies and see how changing various things will effect the macro-universe. I think it is one of the most unique and awesome titles on Steam. It is well put together, the physics…”

— a player, Steam review · 5 hrs played
Not recommended · 106 found this helpful

“Basically this title was getting too long in the tooth for Early Access to continue on Steam. So... The devs renamed it to legacy and dumped it. Started Universe Sandbox over again in Early Access... and of course expects you to buy it again. What a scam! What is more…”

— a player, Steam review · 0 hrs played
Read more reviews ↗

Player activity

Monthly average concurrent players. Live data self-collected from the Steam API · history through 2026-06 via SteamCharts.

3,209all-time peak
0 250 500 2013 2015 2017 2019 2021 2023 2025 No data collected for this period 266 avg · Jul 2013

Achievement stats

Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-10-26.

16achievements
5.0%median completion
1.1%rarest: One Year
97.5% of players 96.9% of players 64.7% of players 43.8% of players 33.5% of players 29.2% of players 23.3% of players 6.1% of players 5.0% of players 3.4% of players 2.9% of players 2.2% of players 1.3% of players 1.2% of players 1.1% of players 1.1% of players 97.5% 0% most earned rarest
Almost everyone has
97.5%Startup the Universe — Start Universe Sandbox at least once
96.9%One Minute — Rule over your universe for 60 seconds
64.7%Snowball Earth — Freeze the Earth by moving it farther from the Sun
Rarest badges of honor
1.1%One Year — Rule over your universe for 12 months
1.1%Startup Too Many — Start Universe Sandbox 10^4 = 10000 times
1.2%One Month — Rule over your universe for 30.4 days

Price tracking

US-region pricing (USD), sampled twice daily by our own tracker since 2026-07-11. Steam prices vary by region — always confirm your local price on Steam.

Freecurrent · sampled 2026-08-12 07:53 UTC
Freelowest since tracking began2026-07-11

Latest official news

Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.

Aug 24, 2015
Universe Sandbox ², the long awaited sequel, is now available on Steam

Universe Sandbox ² is now available now on Steam: http://store.steampowered.com/app/230290/ Universe Sandbox ² is in alpha and very much unfinished, but it already blows away the original version with

Aug 24, 2015
Universe Sandbox ², the long awaited sequel, is now available on Steam

Universe Sandbox ² is now available now on Steam: http://store.steampowered.com/app/230290/ Universe Sandbox ² is in alpha and very much unfinished, but it already blows away the original version with

Aug 28, 2014
Universe Sandbox ², the long awaited sequel, is now available for purchase

Get instant access to the Universe Sandbox ² Alpha on Steam for Windows, Mac, and Linux and pre-order the finished game. Available for purchase at http://universesandbox.com/2 While you buy though our

Aug 28, 2014
Universe Sandbox ², the long awaited sequel, is now available for purchase

Get instant access to the Universe Sandbox ² Alpha on Steam for Windows, Mac, and Linux and pre-order the finished game. Available for purchase at http://universesandbox.com/2 While you buy though our

Games like Universe Sandbox Legacy

From our knowledge graph — ranked by shared traits, not a black box. Each card says why it's here.

Universe Sandbox Universe Sandbox 96.7% · 22,242 reviews shares God Game, Science, Space Sim, Destruction Kerbal Space Program Kerbal Space Program 95.7% · 95,455 reviews shares Science, Space Sim, Education, Space ΔV: Rings of Saturn ΔV: Rings of Saturn 92.8% · 2,769 reviews shares Science, Space Sim, Space, Sandbox Cell to Singularity - Evolution Never Ends Cell to Singularity - Evolution Never Ends 86.1% · 10,734 reviews shares God Game, Science, Education, Space SpaceEngine SpaceEngine 96.0% · 9,300 reviews shares Science, Space Sim, Education, Space Spaceflight Simulator Spaceflight Simulator 96.7% · 5,500 reviews shares Science, Space Sim, Space, Sandbox Solar 2 Solar 2 90.4% · 1,597 reviews shares God Game, Space Sim, Space, Sandbox SPORE™ Galactic Adventures SPORE™ Galactic Adventures 90.9% · 4,274 reviews shares God Game, Space, Sandbox, Sci Fi

Screenshots

Official Steam store screenshots — click any shot to enlarge.

Facts & details

From the Steam store record, snapshot 2026-05-12.

GenresCasual, Indie, Simulation
Player tagsSimulation · Sandbox · Space · Physics · Science · Education · Indie · Casual · Singleplayer · God Game · Sci-fi · Free to Play (SteamSpy community voting)
FeaturesSingle-player · Steam Achievements · Steam Trading Cards · Stats · Family Sharing
LanguagesEnglish
Achievements16
Official sitehttp://universesandbox.com/
Minimum system requirements (PC)

OS *: Windows 7 / Vista / XP Service Pack 3 Processor: 1.5 GHz Processor Memory: 1 GB RAM Hard Disk Space: 250 MB Video Card: DirectX 9 level graphics card