Metro: Last Light may not be coming until sometime in 2013, but today THQ has announced pre-orders for a limited edition are available. This previously unannounced edition is available to pre-order right now for 360, PS3, and PC. If you're a fan of having games digitally, then you'll be able to order it through PSN on December 18th.
Why would anyone want to order a limited edition via digital distribution? In the case of Metro: Last Light, it's probably due to the fact that the special goodies included are all digital anyway. The content expected to come with the Limited Edition is as follows: A regular copy of the game, Ranger Mode, extra military grade bullets, and a Russian rifle. Obviously, everything minus the game is DLC. As may be expected, this edition will cost $60 just like any other game.
Those who pre-order on PSN will get a bit extra though, which may spur some to take that route. It will also come with a Metro: Last Light PSN theme at time of purchase, as well as a copy of Homefront later.