Microsoft launched the Games on Demand service for Games For Windows Live just last week but this week they are holding their first download sale with several game titles priced at 50 percent below their normal price. The games on the list include the promised Games For Windows Live version of indie titles like World of Goo and Osmos.

Other games that are a part of the 50 percent sale include Viva Pinata, Shadowrun, the puzzle game Mahjong Wisdom and Where's Waldo The Fantastic Journey. The nice thing about the sale is that it's not scheduled to end until January 4 so there's plenty of time to take advantage of it.

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