https://www.techradar.com/news/the-most-impressive-pc-mods-ever-made

Nothing quite sums up the limitless possibilities of PC gaming like the humble mod. When a developer eventually moves on from a game to digital pastures new, or a title fails to live up to the expectations of its audience, there’s a good chance said game will simply fade away into obscurity. 

But then, one or more talented users step in and that’s where the magic really starts to emerge. Games that are completely overhauled into something new; games that are fixed or finished where the original version was lacking. Games once lost, but now refreshed a new.