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BRUTAL, the framework behind RimWorld's Waylith engine, releases its source code #SourceCodeRelease #GameDev #BRUTAL #RimWorld

gamingonlinux.comBRUTAL, the framework behind RimWorld's Waylith engine, releases its source codeWith the news recently about RimWorld dropping Unity for their own game engine, we now have a little more info on the tech behind it called BRUTAL.

Peter Berry

@thrawcheld.bsky.social

This is an open source licence, very similar to 4-clause BSD. Not GPL-compatible because of the advertising clause but still open source. www.nuget.org/packages/Ahw...

nuget.org NuGet Gallery | License of Ahwoo.BRUTAL.Core 2026.10.1

Liam @ GamingOnLinux

@gamingonlinux.com

It is not OSI approved, it is not open source, it's a customized license.

Peter Berry

@thrawcheld.bsky.social

Not OSI approved doesn't mean it's not open source, as with the 4-clause BSD, like I mentioned. In fact I suspect it's unintentionally copyleft due to clause 1 (a game using it will contain "substantial portions" of it and thus require granting permission to modify and make copies).

Liam @ GamingOnLinux

@gamingonlinux.com

If it is not OSI approved, it is not open source. You can't just make up any license, or edit any existing license to your liking, add some extra clauses and claim it is open source. That is not how it works.

16/10/26, 4:14 pm0 reposts2 likes

Liam @ GamingOnLinux

@gamingonlinux.com

There is an existing term for it - source available.