The developers have a blog post on how their codebase was a mess and difficult to work with, and their process of fixing it: https://www.factorio.com/blog/post/

The developers have a blog post on how their codebase was a mess and difficult to work with, and their process of fixing it: https://www.factorio.com/blog/post/fff-366 https://www.factorio.com/blog/post/fff-366