No personal experience but Euro Truck Simulator seems to be doing it well
Enemy Within for XCOM Enemy Unkown was a perfect addon. New storyline, new surprises and more polish to the main game. Well worth the money
Rimworld or Crusader Kings. Their DLC expands the possibilities of what can happen during a game and are entirely optional. Their existence doesn’t take anything from new players who only own the base game and you can pick and choose what you want to add to your game to expand it how you so choose.
I second Rimworld. The DLCs literally only add content, and are completely optional even if you own them. In fact, let me shill Rimworld for a second…
Never have I felt every emotion possible from playing a game. From sorrow about one of my child colonists getting gunned down trying to move a rock, to triumph watching a lone colonist single-handedly repelling a mech threat with a bolt action and a sandbag. Rage, watching one of those bastards breakdown from having to sit in a shitty chair and murdering the only doctor in the colony, then dying to the wounds sustained from said doctor shortly after.
Ate without table / 10
Pretty cliche, but The Witcher 3.
Fallout is pretty good. I appreciate that they have DLC directly from Bethesda, as well as the openly approved mods and the ability and openess to allow bigger mods that expand the game. There’s a lot of reasonable hate for Bethesda and their timeframe, but they’re pretty good on allowing mods that are essentially amateur DLC. I just wish we had an update to really make the series new.
Bioshock Infinite Burial at sea episodes 1 and 2 are the only DLC I ever bought. They close a wonderful history.
Any FROMSOFT game
The case of the golden idol and the sequel (rise of) both had brilliant DLC which really expanded the lore of the game
