Steam adds achievement sets with separate progress bars

Valve introduced "achievement sets" for Steam, letting developers group achievements from a base game and its DLCs into sets with their own progress bars and a "set complete" trophy. Seasonal sets that developers can archive are supported, and the feature is live in the latest Steam client beta.

• Developers can split base game and DLC achievements into separate sets
• Each set has its own progress bar and a "set complete" profile trophy
• Seasonal and time-limited holiday sets can be archived
• The feature is available in the latest Steam client beta