I think in many cases a bigger issue is going to be how the game is designed, whether open or closed source.
If your open source game is a mess of poorly-documented, barely-decipherable spaghetti code, held together by a bunch of tacky bullshit, that’s going to be a nightmare to mod.
On the other-hand, a closed source game may have absolutely phenomenal documentation and tools available specifically to enable the modding community.
Similarly, you can have well-written, open-sourced code with built-in mod support with proper documentation, and you can have ridiculous bullshit closed-source code that no one is quite sure how or why it even works.
I think in many cases a bigger issue is going to be how the game is designed, whether open or closed source.
If your open source game is a mess of poorly-documented, barely-decipherable spaghetti code, held together by a bunch of tacky bullshit, that’s going to be a nightmare to mod.
On the other-hand, a closed source game may have absolutely phenomenal documentation and tools available specifically to enable the modding community.
Similarly, you can have well-written, open-sourced code with built-in mod support with proper documentation, and you can have ridiculous bullshit closed-source code that no one is quite sure how or why it even works.