Open Source with an asterisk:
> a) You do not sell or otherwise commercialise the Work or Derivative Works as a Game Engine Product; and
> a) You do not sell or otherwise commercialise the Work or Derivative Works as a Game Engine Product; and
Such a noncommercial clause means that this does not really follow the Free Software definition and Open Source definition of "open source".
It then goes on to show the difference very clearly, and as you can see the only difference from the Apache 2.0 license is that additional clause about non-commercialisation of the engine+editor package. You are still free to sell your Defold games, sell your Defold add-ons and sell your Defold tutorials.
So it at the very least claims to be a "permissive" license. The non-commercial restrictions are not mentioned there, one has to read on.
I'm fairly sure Epic don't let people fork, modify and then sell Unreal Engine either.
* You are free to commercialise any software created using Defold * You are free to commercialise any plugin, extension or tool created for use with Defold * You are free to modify Defold and you are not required to share the changes * You are free to distribute original or modified (derivative) versions of Defold)
Just a reflection as non-native English speaker. Game Engine Product is not the same as 'Product of Game Engine'.
edit: Don’t get me wrong, this is great. But it’s not OSS.
If your company worried about someone making money off editor you can just keep this part proprietary while releasing the engine under OSS-compatible license. There is plenty of "open core" projects out there.
Not strictly open-source, but I see it as a defense mechanism in order to survive.
The license page is very clear on this: https://defold.com/license/
* You are free to commercialise any software created using Defold * You are free to commercialise any plugin, extension or tool created for use with Defold * You are free to modify Defold and you are not required to share the changes * You are free to distribute original or modified (derivative) versions of Defold * You are given a license to any patent that covers Defold
You can sell anything you want created with or related to Defold, but not package the engine+editor and sell those.
Edit: ahh just noticed that you are(from comment history).