Those who enjoyed the challenging "Ranger Mode" setting in Metro 2033 will have to get Metro: Last Light's Limited Edition -- announced today -- to get it in the sequel. The good news is that it's not one of those extravagant, hundred dollar boxed editions -- it's all digital stuff, and has had no extra pricing announced.
As well as Ranger Mode, the Limited Edition includes a "Ranger load-out," complete with extra military-grade bullets to use as currency, and a powerful AKS-74U rifle.
For PS3 users, anybody who preorders the Limited Edition on the PlayStation Network from December 18 will also receive a free PSN theme and a digital copy of Homefront. So far there's no option to just take the theme ... which is really unfortunate.