The Souls franchise shares a similar gameplay base and themes and aesthetics drawn from many fantasy genres

I've seen people and close friends mock this game as a "bad dlc" for Fallout 3 (???)

Shares the same game base and part of a map from its predecessor

Shares the same game base and map as its predecessor

This goes for each Mega Man subseries, I took this one just as an illustration, each subseries has its core of similar functioning between its games

Ryu Ga Gotoku is a series that uses recurring cities and beat n' up gameplay in most of its games, which is why I've seen many say that all its sequels are like "big dlcs"