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The Powder Toy

@powdertoy.co.uk

The Powder Toy is a free and open source particle physics sandbox game. Download it from powdertoy.co.uk or find us on Steam!

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The Powder Toy @powdertoy.co.uk · 08/08/2026

Changelog

Screenshot of "Recent Changes" page from the website.

Added
Shift+0 shortcut for vorticity display mode

Changed
Allow SEED to grow on SPNG and drain water from it
Adjust ACID+BASE = SLTW reaction to make it easier to trigger
Reduce lag in water equalization by fixing a bug in the algorithm
Reorganize intro text and add more shortcuts

Fixed
Fix high vorticity values producing self-sustaining airflows in thin tubes
Fix rendering framerate cap not loading from preferences
Fix crashes when loading saves with specific corrupted data
Fix multiple crashes triggered by setting specific properties on some elements via Lua
Fix multiple crashes when using large or unexpected arguments to some Lua functions
Fix crash when typing "0b" into the PROP tool on MacOS

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The Powder Toy @powdertoy.co.uk · 23/06/2026

Version 100.0 has been released! We've fixed a lot of bugs from the beta. There's also some new features, like adding an fps option to settings. Available now on the website, Steam, and Android.

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The Powder Toy @powdertoy.co.uk · 04/06/2026

A new beta has been released, 100.0! This version is an important-looking milestone, but is a pretty standard release reflecting everything we've changed since last February. This release adds BASE, SEED, stamp search, air sim customization, and more. Download and read a longer changelog at tpt.io

Screenshot of the new beta. SEED has been spread onto a SAND base and grown into several large trees. Some of the trees have pink or lime colored leaves. On one end, there is a CLNE cloning some BASE, which sparkles as it descends and eats various elements, similar to ACID.

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The Powder Toy @powdertoy.co.uk · 01/04/2026

VERSION 99.4 OUT NOW! Changelog: - After a painfully long wait, the new TPT version has arrived! The game seems to have been abandoned for so long, that it's in a bit of a ... mess. The element labels have all worn off with time. We hope you'll be able to sort it out

Version 99.4's intro text: "Return of the Powder Dinn"

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The Powder Toy @powdertoy.co.uk · 16/10/2025

Broke the server and caused error message overload

Picture of the upcoming version of TPT, in the save browser. Every thumbnail is displaying a message "SSL: no alternative certificate subject name matches target hostname 'static.powdertoy.co.uk'"

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The Powder Toy @powdertoy.co.uk · 15/09/2025

I guess this doesn't work for open source games. TPT has almost 100 credited developers but is only 6-7MB.

A graph titled Scope of video games according to Hushcrasher Classification System. The Y axis shows Game Size (from 10 MB to 100GB), the X axis shows Credits count (sourced from Mobygames).

The clustered dots on the graph represent 4 distinct scale categories of games - Kei, Midi, AA, AAA. The larger correlation between the size and the credits means larger category of a game.

Edited by me to showcase where TPT falls on the graph, which is far below the chart in an empty ocean. Classications don't apply down here, but it might be implied to still be "Indie" because of how small the game size is.

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The Powder Toy @powdertoy.co.uk · 04/09/2025

With Windows 10's EOL approaching, why not try something old. I can confirm the next version of TPT will mark the return of Windows XP support.

Screenshot of the latest development build of The Powder Toy running on a Windows XP VM.

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The Powder Toy @powdertoy.co.uk · 28/02/2025

MEGA STICKMAN RAGES. (by the way this was made as a joke, we aren't actually adding mega stickman)

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The Powder Toy @powdertoy.co.uk · 27/02/2025

MEGA STICKMAN

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The Powder Toy @powdertoy.co.uk · 02/02/2025

Windows users using the portable version of 99.1 will get a GAME CRASH when updating to 99.2. It is still safe to run the update. The old instance of TPT will bluescreen, and the new instance will launch. Close the old instance of TPT, and then delete the file Powder_upd.exe that it leaves behind.

Image showing two files, Powder.exe and Powder_upd.exe. A red arrow points to Powder_upd.exe with the text "Delete this file"

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The Powder Toy @powdertoy.co.uk · 19/01/2025

Oh no, it wasn't just TikTok that was affected!

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The Powder Toy @powdertoy.co.uk · 16/12/2024

I see nothing wrong here. That's totally the current logo.

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