Open source focus

Open Source Alternatives to Unreal Engine

3 open source Game Engine options similar to Unreal Engine, ranked by named competitors first, sector overlap, and our 0-100 AI-readiness score. Every company listed publishes its source: each one carries an open source sector tag and a public GitHub repository.

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GDevelop
Not rated
No-code game development platform empowering creators to build games without prior technical skills.
Open source
Defcon
Not rated
The Defcon badges feature a unique open-source chip that doubles as a security key.
Open source
Heroic Labs
Not rated
Social infrastructure for games, makers of Nakama game server.
Open source · Self-hostable

Company	License	Founded	Rating	Reviews
GDevelopNo-code game development platform empowering creators to build games without prior technical skills.	Open source	-	Not rated	-
DefconThe Defcon badges feature a unique open-source chip that doubles as a security key.	Open source	-	Not rated	-
Heroic LabsSocial infrastructure for games, makers of Nakama game server.	Open source · Self-hostable	-	Not rated	-