Master Thief

Master Thief is an achievement/trophy in Metro Last Light Redux.

Overview
Throughout the game, the player will find themself stumbling upon locked safe boxes that are hidden away in certain areas of a level. The only way to open these safes is to acquire a small safe key with a red ribbon. These keys are hidden in various areas, usually fairly close to the safe they are supposed to open, but not always. They are also often very easy to miss and require a bit of exploring to find. Finding 10 of these keys and using them to unlock and loot their corresponding safe boxes rewards the player with this achievement.