Sony has announced it'll be making PlayStation 4 titles available for pre-order through the PlayStation Store, ahead of the console's launch. In a tweet, the company confirmed that it'll be rolling out the titles available for pre-order, starting with Knack and Warframe today. The PlayStation 4 will be available along with both Knack and Warframe on November 15 in North America and November 29 in Europe. Source - IGN