Lots of mods for older games circumvent steam, so steam does not know about the game running. Famous example was Skyrim and Skyrim script extender. If this is the case with mmod idk

Well the submarine on their is for research afaik (the hospital too I guess) he is doing ocean floor mapping afaik with manned submarines

Well their goes FFXIV, that will be their end

Well I don’t know this spell force but in general it is a solid game, monkey island is liked by quiet a few ppl, rest is not good or known to me. Would be a hard sell for 15 tbh