Play SuperTux online — the full game, free ▶ Play now — official web build, opens full page
Guide updated November 2026 · Runs via WebAssembly (native port)
SuperTux is the free, open-source side-scrolling platformer starring Tux the penguin: run, jump, stomp snowballs and collect coins across Icy Island and the Forest. This is the SuperTux project's own official web build of version 0.6.3 — the complete game. Click the launcher and it opens in this tab.
Controls — what does what
| Action | Keyboard |
|---|---|
| Move | Arrow keys |
| Jump | Space |
| Run / throw fireballs | Ctrl |
| Duck | Down arrow |
| Menu / back | Esc |
FREE This is the complete game, free. Free software: code under the GNU GPL version 3, data mostly under CC BY-SA. The complete game.
SuperTux is by the SuperTux Devel Team, used under the GNU GPL v3. Official 0.6.3 web build; what was changed is listed in NOTICE.md.
How it works & what to expect
The game is the SuperTux team's official WebAssembly release, hosted here unchanged. It is big: about 250 MB of levels, graphics and music are downloaded the first time you play, so start it on Wi-Fi and give it a minute or two. After that your browser keeps it.
SuperTux opens as a page of its own, not inside this one. It runs on several threads, and browsers only allow that on a page that is isolated from other sites — which a game framed inside another page cannot be. Use your browser's Back button to return here.
It needs WebGL and a reasonably recent computer. It is not a good fit for phones or for low-memory Chromebooks.
Playing it
Use the arrow keys to move, Space to jump and Ctrl to run or throw fireballs once you have a fire flower; the down arrow ducks. Every key can be changed under Options → Setup Keyboard. Choose Start Game → Story Mode to begin on Icy Island; the Level Editor on the main menu works in the browser too.
Why it is free
SuperTux is free software. Its code is under the GNU General Public License, version 3 or later, and most of its artwork, levels and music are under Creative Commons Attribution-ShareAlike. Nothing here is a demo or a first episode: it is the whole game, as the project released it.
Frequently asked questions
Is this the full SuperTux?
Yes. It is the official 0.6.3 web build published by the SuperTux project, with Story Mode, the bonus levels and the level editor.
Why does it take so long to load the first time?
The game's data is about 250 MB. It is downloaded once and then kept by your browser, so later visits start much faster.
Why does it open as a separate page?
SuperTux uses several threads at once, and browsers only allow that on a page isolated from other sites. A game framed inside this page could not be isolated, so the launcher opens it on its own.
Does my progress save?
Yes. SuperTux stores your save games in this browser. Clearing the site's data removes them.
More you can play in your browser
Related guides
- Commander KeenMarooned on Mars: the shareware episode that made id Software.
- Jill of the JungleEpic MegaGames' 1992 platformer, the shareware first episode.
- NeverballTilt the floor, roll the ball: the open-source 3D classic.
- Bio MenaceApogee's action platformer: freeware, the complete game.
- Games that need nothing installedThe full list of titles that run on a locked-down school or work network.
Want a game like this on your own site?
SuperTux isn't ours to give away — we host it, we didn't write it. But eleven of the games here we did write from scratch, and those are free for anyone to put on their own page: one line of HTML, no account, no permission, no attribution beyond a credit line.