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Universe Sandbox: the physics of the universe on your desk
Universe Sandbox isn't a "space game" in the usual sense — it's a true galaxy-scale physics sandbox by Giant Army. There are no levels, no score and no timers: you take gravity, climate, collisions and matter, and do whatever you like with the cosmos. Want to crash Earth into the Moon? Easy. Ignite a second star over the Solar System and watch Earth's oceans boil? A couple of clicks. Universe Sandbox runs all of this on real Newtonian mechanics rather than just for show, so every experiment feels believable.
At Brawl Games you're buying the full version of Universe Sandbox, which we deliver to you as a Steam Gift. Once you accept the gift, the game stays in your library for good — this is a purchase you own, not a rental or a subscription.
What Universe Sandbox can do
Under the hood are several simulations running at once and feeding into each other:
- N-body gravity. Every body attracts every other by Newton's laws — orbits live their own life, systems settle or fall apart in front of you.
- Planetary collisions. Slam one planet into another and watch debris fly, crust melt and a new body take shape.
- Climate and terraforming. Heat or cool a planet, add water, oxygen and CO₂ from a set of materials, and track seasonal ice caps and ocean warming.
- Stellar events. Supernovae, flares, pulsars — plus black holes that genuinely warp the light around them.
- Build systems from scratch. Sculpt stars, planets, moons, rings and whole star clusters, set their parameters and see what they become after millions of simulated years.
Who it's for
Universe Sandbox works equally well as a smart "what if…" time sink and as a hands-on tool for anyone who loves astronomy. It's a calm, meditative game with no pressure: spend an hour fine-tuning the real Solar System, or unleash cosmic chaos and grind a couple of planets to dust. Steam Workshop support means thousands of ready-made scenarios — from accurate copies of real systems to wild contraptions — are a couple of clicks away, and you can share your own there too.
Platforms and language
The game runs on Windows (10/11, 64-bit) and macOS (11.0+), and the interface is translated into 20+ languages, including English and Russian. Linux isn't officially supported, but many people run Universe Sandbox via Steam Play/Proton — that's at your own risk, with no guarantee of stability.
How we deliver the gift
Delivery goes through a bot: you provide your Steam friend-invite link and your account region, place the order — and the bot adds itself, sends Universe Sandbox as a gift and leaves your friends list once it's delivered. You don't need to accept the friend request manually, and Steam Guard isn't required either. Delivery usually takes about a couple of minutes from checkout.
Important region conditions
A Steam Gift only applies if your Steam account region matches the gift region, so pick the variant for your region and enter it honestly. The second hard requirement is that Universe Sandbox must not already be in the recipient account's library — Steam won't accept a gift for a game you already own. And don't forget to allow friend requests in your privacy settings, or the bot won't be able to find you.
Similar games in our catalog
If you enjoy tinkering with the physics of space, take a look at our other sandboxes and simulators: Kerbal Space Program for building rockets and learning orbital mechanics hands-on, SpaceEngine for a photorealistic 1:1 universe to explore, and Stellaris for those who'd rather rule a galaxy than just watch it.
What to do in your first hours
If you're opening Universe Sandbox for the first time, the easiest start isn't empty space but the ready-made scenes. Load the real Solar System and speed up time — you'll watch the planets faithfully run their orbits. Then try gentle experiments: crank up Jupiter's mass and see it start pulling its neighbors apart; nudge Earth closer to the Sun and follow the climate. Once you're comfortable, move on to the destructive scenarios — collisions, supernovae, black holes — and to building your own systems from scratch. It's exactly this rules-free freedom that keeps players in Universe Sandbox for years.
The purchase in short
You get a full copy of Universe Sandbox on Steam that's yours forever — no subscriptions, no rentals. The key things at checkout: provide a working invite link, choose the right region and make sure the game isn't already in the library. The bot handles the rest, and the game stays with you, receiving free updates from Giant Army.