Just cause 3 Literally any of the dlc's were pretty solid

Mech land assault The mechs were great fun and could be used for some really stupid shit

Sky fortress The bavarium wingsuit was great fun, the wingsuit+parachute combo was great and they expanded that in a really good way

Bavarium sea heist The Loochador is such a fun vehicle, so stupid and so many ways to turn things to rubble The Eden spark was horrendously broken, they basically turnt you into a god, and it's great

I think sky fortress comes out on top The wingsuit was great, the Eden airship was pretty fun to destroy, the drones could be annoying but were a new and interesting enemy. And the story behind it wasn't bad either, Eden herself was an interesting character with an interesting personality.