This kind of projects (OpenRCT2, OpenLoco, Open...) are absolutely awesome!
But all of them need one step, free assets under Creative Commons or similar licenses).
I remember the big change of OpenTTD when it became finally all free software.
I wish to know Blender3D to help this projects, but I am a regular IT guy.
> OpenLoco
To my knowledge this is a recreation in Unity, not a decompile, and it was done without AI assistance as it was the goal of the developer to learn Unity.