In order to obtain this Trophy, you must select the Survival mode from the main menu and complete the game.
There are a few key elements of this mode:
-Fewer resources available
-Difficulty increase in enemy AI
-Air Filters carry only 3 minutes of Oxygen maximum
My advice for this mode is to take your time, search for ammo and try to sneak through sections as much as possible. When you have partners try to let them take on most of the enemies whilst keeping yourself safe. Often Nosalises and Watchmen will ignore NPC's and go straight for you, so be careful. I recommend attempting this after your first playthrough and are comfortable with the mechanics.
Once you have completed a full playthrough on this mode, the Trophy will unlock.