Factorio 1.0
It's the game to teach people what technical debt and refactoring is.When you start building your factory, you think about how to get first steps just done (ship it!). Over time complexity and scope of your factory increases, but old code, I mean old machines, are still there, getting in the way.You can choose to ignore it and work around it using underground belts and similar solutions, or you can take on a proper refactoring, limiting your progress in the short term.