Portal 2's map creator was only released a few days ago, but it's already being deemed a success based on early results. Players have created more than 35,000 maps, and, those have been downloaded more than 1.3 million times, Valve announced yesterday.
To mark the occasion, Steam is holding a Weekend Workshop sale on the various games that make use of its Steam Workshop feature. Portal 2 is 66% off ($6.79), The Elder Scrolls: Skyrim is 33% off ($40.19), and many Team Fortress 2 Workshop items are 50% off.
Team Fortress 2 has had a bustling user-creation community for pieces of equipment, and Bethesda recently noted it had hit 13 million downloads of Skyrim modes through Steam. Portal 2's puzzle creator has just gotten off the ground, but it's off to a good start.