TERRATECH!!! i almost forgot about this game but it's a cool sandbox game where you have a tech on an alien planet and get to make a factory (kind of like Satisfactory but with giant tanks and stufF) (check it out here)
Garry's mod is pretty cool. Lots of mods and other doohickeys you can make (and level saves kinda like minecraft) Playermodels, items, characters, yadda yadda (check it out here)
