They appear to have a pretty well-defined modding interface that didn't rely no unity's custom data structures. I'd suspect this project was started some time back, not just a one-shot port. Can't say whether or not any LLM's were used on tested in this project, but I get the feeling they set themselves up for making it portable from the start via some good old fashion thinking.
LLM's are still kinda shit at porting large in-house game projects. They can quickly and easily mangle codebases.
LLM's are still kinda shit at porting large in-house game projects. They can quickly and easily mangle codebases.