"Congratulations! The simple fact that you're standing here listening to me means you've made a glorious contribution to science."
— Cave Johnson
The Steam Workshop is a portion of the Steam Community website, which allows users to create and share content for various games integrated with the Workshop.
As of the Perpetual Testing Initiative DLC for Portal 2, the Workshop now handles community-made test chambers created within the Puzzle Creator. Players can download other players' puzzles in-game, and evaluate those puzzles.
On September 14, 2014, Valve expanded the Portal 2 Workshop to have a physical merchandise section called the " Portal Merchandise Workshop," where Steam users can upload and vote on clothing and accessory designs that can be sold.