Thank you for getting back to me. If Tynan is fine with using the normal wiki license, do you know how quickly it's possible to get that into the footer on the page? Do you have to check with him, or can it be done more or less right away? With that in place, we could borrow content from other wikis and adapt it here, which I think could be useful. I'm also thinking about a frontpage redesign, if that is agreeable, and with the licence in place I could borrow some regular setups instead of starting from scratch. Depending on how it's done, it might require some changes to the .js file (if going with a flexible approach similar to many Gamepedia wikis).
About mass-updating, I actually just got AutoWikiBrowser working this evening (had to install a Win7 VM), and managed to log in. Stuff would probably time out pretty quickly as a regular user, for instance if I tried to give a bunch of files a category, technically editing the pages. However, I could try a little test run to see if it works like I remember. It's a powerful tool with RegEx capability and various filtering and automation possibilities. Haven't worked on it for about 2 years, so need to catch up on it first.
Managed to extract all the game images now (or so I think, around 2000 pictures). Names are a little different, and most of the important ones are probably uploaded already. But one I did find, that apparently isn't on the wiki, is the background image from the game itself (the nice-looking planet). I wanted to test out having it as a semi-transparent background for the wiki. With the licence in place, I can try to test out stuff like this on my user page (with custom CSS).
Totally understandable you're not up to speed with the templates any more after a few years. It can get pretty complex, and that appears to be the case here. Hurts just trying to wrap my head around it :D Personally I find it easier to work with templates if each thing/category has a template, instead of one super-template that's supposed to cover everything (and with several nested helper templates). From what I can gather there are sort of two super-templates here: infobox/thing and infobox main. But I'm not sure how it all ties together, and how to go about trying to edit them, or tie new templates with them. Err, so maybe best to ignore all that for now. It's also possible that this nesting and frequent template calls gets expensive in terms of performance.
Sorry for the essay here. If you are able to get that license info into the footer it would be easier for both me and others to take other content and adapt it for this wiki. Maybe it was merely an oversight from years back, and nobody have thought about it since. It happens.