This add on includes three original single player missions, each casting the player as a different specialist from the warring factions -- the Red Line, the Reich and the Polis Rangers.
via N4G: pc news feed http://n4g.com/news/1312593/metro-last-light-faction-pack-dlc-trailer
via N4G: pc news feed http://n4g.com/news/1312593/metro-last-light-faction-pack-dlc-trailer