From Friday, February 26th through Monday March 1st you will be able to purchase the award winning game Batman: Arkham Asylum for 75% off through Games on Demand on Windows. Plus, each weekend in March will bring a new discounted Games on Demand title. I’ll post a note on my Twitter account each Friday to let you know what G4W- LIVE title is on sale that weekend.
Remember you’ll need to download the free Games for Windows – LIVE client and when you purchase games within the client you can use either points or credit cards.
Edit: Yes, this offer will be available in all regions where Games on Demand are supported.
P.S. After you’ve got the client installed, you’ll also want to grab the free game Tinker, which also has 200 Gamerscore that you can get…for free.