This achievement is won shortly after obtaining your pistol at the start of the game and is unmissable. After killing your first enemy and using the bolt cutters to open the gate, several enemies will be present on the rooftops. These enemies will aggro on you when moving forward initiating the ‘survive’ objective.
Your not meant to fight enemies here so just keep moving and try not to get cornered.
Eventually, after enough time has elapsed, you will have a scripted enemy attack you and start a cutscene. During the cutscene you’ll get the achievement.
