PS4 games go on sale on PlayStation Store

PS4 may not be available until November 15th, but that doesn't mean you can't start buying games now. PlayStation Store has started selling pre-orders of upcoming PS4 games, including one free-to-play game you can "buy" right now. Look at you, buying a PS4 game already!

The collection currently includes two games: Knack ($59.99) and Warframe, a free-to-play shooter from Digital Extremes. You're less likely to know about that game, so here's a trailer:

As ATimson points out, these games should work towards Sony's current PlayStation Network promo, which has you earning $10 rebates for every $50 spent.