I think that there should be a way we can enter and log the amount of achievements we have earned from games. I like to keep track of achievements and it would be nice to be able to note down this on the website.
I’ll do you one better, the planned functionality is to automatically sync achievements across Steam, Microsoft, and Sony systems using their services. I haven’t looked but it may be possible to take in achievements from GiantBomb too, which would provide an “official” way to add achievements to games that don’t expose any.
This will be coming at some point. The new data provider IGDB provides centralized achievement data that I can use :)