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Exploring the Tech and Design of Noita

GDC Festival of Gaming7 HN recommenders · recommended in 7 months, 2020–2026
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talk · intermediate · evergreen · 2020–2026 on HN

In this 2019 GDC session, Petri Purho of Nolla Games explains the technical side of Noita's physics engine, including scaling a falling-sand simulation to large continuous worlds and adding destructible rigid bodies. It also shows how the emergent physics dri…

It is the go-to talk for anyone building falling-sand or pixel-physics simulations, and several commenters say they modeled their own engines on it.

10 comments from Hacker News

@hopfog2026-08 · in “Ask HN: What are you working on? (August 2026)”

Thank you! It's funny because I really wanted to introduce more things like that, but the very simple things I've added so far have received a bit of pushback ("I want to play a factory game, not solve puzzles!"). So now I'm reconsidering it, but I think there's a lot of room for really interesting Noita-style secrets when combined with the automation and processing tools. Overall it's a much simpler and more controlled experience than Noita though, so don't expect anything like it. By the way, this talk by the Noita devs has been instrumental when building my engine: ▶ this video Highly recommended!

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@hopfog2024-04 · in “Web Game Engines and Libraries”

Thank you! If you haven't played Noita it's basically a "falling sand" or powder physics game where every pixel is simulated. You need a special cellular automata that is not your typical game physics engine, so I don't think Babylon.js would be a good choice but I may be wrong. I've modeled my architecture after this fantastic GDC talk by the Noita devs: ▶ this video ("Exploring the Tech and Design of Noita")

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@panzerboiler2022-05 · in “Making a falling sand simulator”

Nice work, Jason. I enjoyed a lot a talk [1] at GDC by Petri Purho (Nolla Games and before that Kloonigames) that explains the "Falling Everything Engine" used in their game Noita (that I would love to play on my mac...). Highly recommended if you want to dive deeper into the topic. [1]: ▶ this video "Exploring the Tech and Design of Noita"

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@thezipcreator2026-02 · in “Sandboxels”

this doesn't answer any questions about this game, but I found this GDC talk about Noita pretty interesting: ▶ this video

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@bo0tzz2022-05 · in “Making a falling sand simulator”

Here's a talk from the creator of Noita about the underlying tech. From 9:20 he talks about their multithreading implementation. ▶ this video

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