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

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...

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).

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.