Here's an admittedly weird thing I've made (that's a Steam Workshop link, here's the MediaFire link if you want to download it and put it in the CK2 mod folder yourself). I wanted to make a mod for Crusader Kings II, likely my favorite game ever, which is usually about war and marriage politics in medieval Europe (and North Africa and India and Central Asia).
So what I've done is replaced all those medieval duchies and kingdoms with the real-life soccer teams and leagues that represent the same locales today: Manchester United, Paris Saint-Germain, Juventus, all vying to rule the Premier League, Ligue 1, Serie A, and eventually the Champions League. Every team is "ruled" by its actual real-life owner or more often chairman of the board, and lots of teams have their real manager and star players in the game as well (unfortunately there's not a great way in-game to see who's managing or playing for the other teams, so you might not end up interacting much with Zlatan or Mario Balotelli. I may come up with a solution for this at some point.)
Here it is, available through the Steam Workshop, The Football Mod. You'll need Crusader Kings II to run it, and it's barely been tested at all, so there may well be a million bugs left to find and fix. Let me know if you find any.
Here are some screenshots of the mod: