F-e-a-r-fear-platinum

To survive the intense AI and supernatural encounters, master the following:

This is your most vital tool. It slows down the world while allowing you to move and aim at near-normal speeds. Use it in short bursts to clear rooms or headshot multiple enemies before they react. f-e-a-r-fear-platinum

Finding boosters is critical for increasing your survivability throughout the campaigns. Permanently increase your maximum health. To survive the intense AI and supernatural encounters,

Crouching makes your movement silent, and unaware enemies take 50% more damage . Avoid sprinting directly into groups of enemies, as they will flank and suppress you using superior AI. f-e-a-r-fear-platinum

These provide backstory and are required for 100% completion achievements.