Image credit: Valve

Valve is beta testing Steam Achievement Sets, a feature that lets developers group a game's achievements into collections.

In an announcement , the company said that games "live longer than ever, continuing to receive updates through new DLC, expansions, and seasons", but that achievements added with new content "can be hard to discover and can accidentally break the completion status of players who have already finished the game".

That's why developers can now specify the number of sets and the purpose of each "to match their game's specific needs", so one game might group its achievements into single-player and multiplayer groups, while another could use eight class-based sets.…