It's even cheaper at Amazon and you get a Steam key (75% off):

http://www.amazon.com/Microsoft-DEADLIGHT-Download/dp/B00AR05D6O/ref=sr_1_1?ie=UTF8&qid=1359495548&sr=8-1&keywords=deadlight+pc

If you want to save even more money, get the Amazon 5 pack deal:

http://www.amazon.com/Microsoft-5-Game-Arcade-Indie-Download/dp/B00B1ULJI0/ref=sr_1_2?ie=UTF8&qid=1359495548&sr=8-2&keywords=deadlight+pc