Free planet games let you build worlds, defend them or smash them apart. Sandbox games like Solar Smash and WorldBox are open-ended, tower defence games ask you to protect a planet from invaders, and strategy games pit you against other players. Two listings here say they play offline, and the content rating varies, so check it for younger players.
Ask a child what they'd do with their own planet and you'll get a very long answer. Planet games tap into that same urge to create, rule or, quite often, blow things up.
I read the Google Play listings for popular planet games and noted the developer, installs, the ads and in-app purchases labels, the content rating and any offline wording. They're in no particular order.
The theme is broad, so the games are too. Some are calm simulations you can leave running, some are fast defence games, and two are built around playing with other people online.
Planet games compared label by label
| Game | Developer | Google Play installs | Ads / in-app purchases | Offline wording on the listing |
|---|---|---|---|---|
| Solar Smash | Paradyme Games | 100M+ | Contains ads, in-app purchases | No offline claim on the listing |
| WorldBox - Sandbox God Sim | Mako Mako | 50M+ | Contains ads, in-app purchases | 'You can play this Sandbox game offline without wi fi or internet connection' |
| War Planet Online: MMO Game | Gameloft SE | 10M+ | No ads label, in-app purchases | No offline claim on the listing |
| TerraGenesis - Space Settlers | Tilting Point | 10M+ | Contains ads, in-app purchases | No offline claim on the listing |
| Ancient Planet Tower Defense | NARDIX, LLC | 10M+ | No ads label, in-app purchases | 'Classic Tower Defense offline (TD)' |
| My Little Universe | SayGames Ltd | 10M+ | Contains ads, in-app purchases | No offline claim on the listing |
| Planet Defense: Space TD | CyberJoy Games | 1M+ | Contains ads, in-app purchases | No offline claim on the listing |
| Space Bound: Planet games | NEWEDGECYPRUS | 500K+ | No ads label, in-app purchases | No offline claim on the listing |
| AstroGame: Space Strategy MMO | Astrotech Innovations | 50K+ | No ads label, in-app purchases | No offline claim on the listing |
| Planet Game | KangJung | 100+ | Contains ads, no in-app purchases | No offline claim on the listing |
Ten games about planets
Solar Smash
A physics sandbox from Paradyme Games, with more than 100M installs, where you turn the forces of space on whole planets and watch what happens. Its listing calls it creative destruction, and it's rated Everyone 10+.
WorldBox - Sandbox God Sim
A god sim where you create life, spawn creatures from sheep and wolves to elves and dwarves, and watch civilisations build houses and roads. Its listing says it plays offline.
War Planet Online: MMO Game
A real-time modern warfare strategy game from Gameloft SE where you build an empire and fight for control of the globe. It shows no Contains ads label but has in-app purchases, and it's rated Everyone 10+.
TerraGenesis - Space Settlers
A planet crafter where you bring lifeless worlds to life and help new civilisations take hold. It's slow, thoughtful and a lovely fit for young science fans.
Ancient Planet Tower Defense
A classic tower defence game from NARDIX, LLC where ancient technology holds back alien raiders. Its listing says it plays offline and shows no Contains ads label.
My Little Universe
A casual worldbuilding adventure from SayGames Ltd where you mine, build and explore your own small universe. Its listing asks whether you want to play god, and it's a gentle way to try.
Planet Defense: Space TD
A roguelike tower defence game where you protect your home planet from waves of alien invaders by building and upgrading defences. Its listing says it's easy to learn.
Space Bound: Planet games
You play an astronaut sent to uncover the secrets of remote planets for a powerful organisation. It's an exploration adventure, with no Contains ads label but with in-app purchases.
AstroGame: Space Strategy MMO
A browser-style space strategy MMO on mobile: build your planet, manage mines, research technology and command fleets in a universe shared with real players.
Planet Game
A merge puzzle in the style of the watermelon game: crash planets together to make bigger ones. It's tiny by installs, with ads but no in-app purchases label.
Smash it, grow it or defend it
Solar Smash sits at the destructive end. There's no wrong move, only different ways to watch a planet break. It's rated Everyone 10+, so younger children may need a grown-up's view on whether it suits them.
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WorldBox, TerraGenesis and My Little Universe sit at the creative end. You're shaping a world, adding life and watching it change. They're the most relaxing games here and work well for kids who enjoy building.
Ancient Planet Tower Defense and Planet Defense: Space TD are defence games. You place towers, waves of enemies arrive and you upgrade between rounds. If you like a calmer, cosier pace instead, my list of cosy games to play slowly has plenty of gentle picks.
Online strategy needs more care
War Planet Online and AstroGame are multiplayer strategy games. Their listings describe competing with real players across a shared world, which makes them better suited to teens and adults. War Planet Online is rated Everyone 10+.
Both show in-app purchases, and neither shows a Contains ads label. In a game built around other players, there's often a pull to keep up, so it helps to decide how much time you're happy to give it before you start.
Starting a young space fan off
- Begin with a creative game such as WorldBox or TerraGenesis.
- Check the content rating on the listing before installing.
- Turn on approval for in-app purchases in Google Play.
- Try a defence game once they want more of a challenge.
- Save the online strategy games for older players.
For a screen break with the same sense of teamwork, cooperative board games let a whole family defend, build or explore together around a table.
Two listings that say they work offline
WorldBox and Ancient Planet Tower Defense both have offline wording on their listings, quoted in the table. The other eight make no promise either way. If you're stuck without a signal and none of these will load, the Chrome dinosaur game is always there in the browser.
Frequently asked questions
Are there free planet games for Android?
Yes. All ten games on this page are free to install from Google Play.
Which planet games work offline?
WorldBox and Ancient Planet Tower Defense have offline wording on their Google Play listings.
Is Solar Smash suitable for kids?
It's rated Everyone 10+ on Google Play, so check the rating against your child's age.
Which planet games have no ads?
War Planet Online, Ancient Planet Tower Defense, Space Bound and AstroGame show no Contains ads label.
What is a planet sandbox game?
It's an open-ended game where you shape or change a world as you like, with no set goal.
Are there multiplayer planet games?
Yes. War Planet Online and AstroGame are strategy games played against real players.
