Fun physics sandbox for wrecking planets
Mentioned in ~2 in 5 positive reviews
“Load the pre-made Solar System simulation. Explode the Sun.”
Steam review · 121.5 h played ↗
Universe Sandbox Legacy
Worth buying? What 300 Steam reviews say.Worth buying? Here’s what 300 Steam reviews actually say.
Mostly Positive · 79%Mostly Positive · 79%Giant Army2011Sandbox · Simulation · Casual
The verdict
A lightweight space-physics toy that's fun for a few hours of smashing planets together, but it's abandoned, crash-prone and replaced by the sequel. Skip it unless you already own it.
Great for
Space fans who like experimenting with gravity and wrecking solar systems
Main risk
Abandoned, crash-prone, shallow legacy version replaced by a sequel sold at full price
What players love
Deep customization and preset scenarios
Mentioned in ~1 in 6 positive reviews
“Great and very deep customization options.”
Steam review · 6.3 h played ↗
Educational and fairly accurate physics
Mentioned in ~1 in 7 positive reviews
“Education is fun! At least with this massive sandbox of the universe. Play with orbits, gravity, mass.”
Steam review · 31.4 h played ↗
Relaxing, endless experimentation
Mentioned in ~1 in 12 positive reviews
“Or you can just load up our solar system, set it at a speed you like and just zen out and watch it like a lava lamp.”
Steam review · 42.5 h played ↗
Runs on very modest hardware
Mentioned in ~1 in 75 positive reviews
“It will run almost flawlessly on a potato And its less than 100mb”
Steam review · 5.8 h played ↗
What players complain about
Abandoned and replaced by same-named sequel
Mentioned in ~1 in 2 negative reviews
“These scumbags invalidated everyone's copy of the game by re-branding it as 'Legacy', after we purchased it”
Steam review · 3.3 h played ↗
Frequent crashes and won't launch
Mentioned in ~1 in 4 negative reviews
“Does not run, crashes immediately. Won't let you quit because the error reporting feature is broken.”
Steam review · 7.2 h played ↗
Shallow, gets boring fast
Mentioned in ~1 in 4 negative reviews
“this game got me bored out of my skull in 5 minutes”
Steam review · 1.6 h played ↗
Not a game; clunky controls and UI
Mentioned in ~1 in 8 negative reviews
“As far as sandboxes go, this is the gameplay equivalent of a box full of sand.”
Steam review · 1.3 h played ↗
Absurd time-based achievements
Mentioned in ~1 in 9 negative reviews
“One of them requires a full year of playtime - 8760 hours - and I refuse to let this become my most played game by a massive margin just to complete the list.”
Steam review · 283.5 h played ↗
Inaccurate physics, objects fly away
Mentioned in ~1 in 12 negative reviews
“If you speed time up, physics change for no reason and objects just fly away”
Steam review · 0.8 h played ↗
System requirements
From the Steam store page
Steam Deck: Unknown250 MB
Minimum
OSWindows 7 / Vista / XP Service Pack 3
Processor1.5 GHz Processor
Memory1 GB RAM
GraphicsDirectX 9 level graphics card
Storage250 MB
OSWindows 7 / Vista / XP Service Pack 3
Processor1.5 GHz Processor
Memory1 GB RAM
GraphicsDirectX 9 level graphics card
Storage250 MB
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