EB Games and JB Hi-Fi will each have an exclusive edition for Metro: Last Light, depending on your preference.
EB Games will be scoring the Ranger Mode DLC, which is being recommended for the more hardcore Metro player and does such things as stripping away the in-game HUD and giving far fewer resources. It'll also be coming with Metro 2033: the classic sci-fi novel which inspired the series.
JB HiFi is offering up an exclusive in-game weapon: the RPK light machine gun, and will also be sporting some merch in the form of a Metro: Last Light handheld torch.
Metro: Last Light will be hitting on 16th May for PS3, 360 and PC.