So this is a fairly big feature request, but everything needs to start somewhere. In the Movie metadata databases they have a feature called collections. This is where they group a series of related films together. An example is the Star Wars Movie Collection you can see it here https://www.themoviedb.org/collection/10
Scope could be as big as 'All sonic games' across all platforms, all versions of a single game across platforms e.g. Green Beret, or versions of a game on a single system 'Roland games on Amstrad CPC 464'
Primarily it helps you navigate to other versions or related gam