Call of Duty: Modern Warfare, or simply known a CoD 4, has received a complete makeover thanks to developers from Raven Software. The title will have enhanced graphics for the campaign, and multiplayer.
The original title was first released back in 2007. However, when Call of Duty: Infinite Warfare has been announced for 2016, it was also announced that a remastered version of CoD 4 will be released. It is fair however to point out that the only way to obtain CoD 4 remastered is to purchase a collector's edition of Call of Duty: Infinite Warfare (for now at least).
Call of Duty: Modern Warfare Remastered will be released alongside with Call of Duty: Infinite Warfare on November 4 for PS4, PC, and Xbox One (but only if you plan to get a collector's edition!).