Steam launches Achievement Sets, with 17 games in beta

Steam is rolling out a feature called Achievement Sets, with a beta running in a small number of games. Developers can split achievements into groups, each with its own progress bar and a set complete trophy that is preserved when new achievements are added. Developers can also archive individual achievements or whole sets, which will not appear on the profiles of players who missed them or block their progress. The first 17 games include Team Fortress 2, Portal 2, Left 4 Dead 2, Forza Horizon 5 and Crusader Kings III.