In the first 24 hours on sale, Portal 2 sold over 400,000 units at retail (VGChartz estimates) and over 275,000 units on Valve's Steam service (FADE LLC estimates). With day one sales of over 675,000 units between retail & digital, we expect week one sales to top 1 million units in the Americas and with the game launching in Europe on April 21st, total sales should be close to 1.5 million by the weekend.