I personally view games [Grouvee] just as another form of media like films [Letterboxd] and anime [MyAnimeList]. Grouvee is just a site that I use to backlog specifically - games. For other medias I use other sites that are made for them.
So when comparing it to MyAnimeList there is a option where you can select between watching [playing] and completed [played with detailed option main story /+extra] and it’s dropped on MyAnimeList
As video games are generally a lot longer then, used in this topic as example, anime I think that there is a really high possibility for someone dropping (not completing) a game.
I third. I should also make a shelf for this because christ only knows how many games I’ve marked as backlogged or played that I’ve actually just left in limbo over the years.