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Open-source alternatives to Unreal Engine

4 projects replace Unreal Engine, the game engine. 4 shipped code in the last 30 days.

4 open-source alternatives

Most-starred first. Stars, growth and activity are live from GitHub.

GodotMost adopted

Free 2D and 3D game engine for cross-platform projects

Stars
118.8k
Growth
+1.2k
Launched
Jan 2014
MITupdated today
GDevelopGrowing fastest

Create 2D and 3D games without coding, powered by AI assistance

Stars
27.8k
Growth
+1.1k
Launched
Jun 2014
Custom licenseupdated today
MonoGame#3 by stars

Free, open-source framework for cross-platform game development

Stars
14.6k
Growth
+113
Launched
Apr 2011
Custom licenseupdated 9d ago
s&boxNewest contender

Build and play games inside a game engine that runs live

Stars
6.5k
Growth
+28
Launched
Nov 2025
Custom licenseupdated today

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