Last Man Standing is an achievement awarded to the player after completing the story on Ranger Mode Hardcore. This can only be obtained once the Ranger PackDLC is purchased. This achievement can be either seen as easy to hard depending on the play style. Playing the game on this difficulty demands a more stealthy approach to the game, which means that purchasing the stealth suit on the mission Armory is a good idea. This is most definitely the case on levels where Artyom is fighting human enemies, such as Frontline. This achievement awards Xbox players with 50 Gamerscore upon completion, being the most rewarding achievement in the game. Simply loading the last level and setting the difficulty to Ranger Mode Hardcore will not give you the achievement, you have to play the entire game on that difficulty.