This is real.
Steam announced that they will offer refunds, starting now.
Anyway, refunds will be possible “for nearly any purchase on Steam – for any reson”. You just have to go to help.steampowered.com and request one. There is one thing you have to keep in mind though: It will only work within the first 14 days of purchase and only if you’ve played it less than 2 hours. This includes DLC, but beware: make sure to keep a save game from before the purchase, otherwise you might run into the issue, that your save will no longer be compatible once you’ve requested the refund.
In-game purchases are also on the list, but only guaranteed on Valve-developed games within 48 hours of purchase.
There are a couple more rules on this, so go to the Steam help page for more information. Hurry up though! Rumor has it, that there is already blood raining from the sky in Antarctica.