From a cursory search there don’t appear to be any good, fleshed-out video games for training in the trades. There are a couple that look promising at first glance (HVAC simulator on Steam) but then you look a little deeper and they don’t have any content. Funding issues, most likely. Everybody agrees it’s a good idea to teach the youth, but when you pass the hat around it always comes back empty because there’s crusades and there’s business, and the only legal business in America is employee surveillance. Hyperbole, but 80% accurate.
It occurs to me the best use of this little side project, other than appreciating the pure autism of it, would be to encode its logical representation of machines and components into a video game engine for simulating any possible assembly, installation, and maintenance task. Well, anything that can be represented by logical operations like “weld this”- actual welding and other “touchy” tasks could be mini-games separate from the main game logic. The most obvious choice of overall UI would be a point-and-click adventure using something like Adventure Game Studio, because something like this procedure maps very easily:
(Each of those steps is pretty intricate and has a flowchart of its own.)
I figure the only way a plan like this would work is to make it easy to expand, do a cool but very small proof of concept, and let it out into the wild. That’s already well beyond my time and abilities probably, but it’s a thought.