The best IDE alternative to Unreal Engine is GDevelop, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 100 alternatives to Unreal Engine and three of them are IDEs so hopefully you can find a suitable replacement. Other interesting IDE alternatives to Unreal Engine are Defold Engine and Project Anarchy.
Unreal Engine alternatives are mainly Game Development Tools, but if you're looking for
IDEs you can filter on that. Other popular filters include
Free,
Raspberry Pi,
Open Source and
Android. You can also filter by region, for example
EU-based alternatives if you prefer software developed in the European Union. These are just examples - use the filter bar below to find more specific alternatives to Unreal Engine.
Allows for creating 2D games only.