It can convert standard items like pain pills into first-aid kits if it detects the survivors are struggling on lower difficulties. Core Gameplay Features
Instead of fixed enemy placements, the Director spawns common and Special Infected out of sight based on the players' current health, location, and skill. left-4-dead-1-game
It alternates between "Build Up," "Peak," and "Relax" phases, ensuring the game feels like a "rollercoaster" of tension rather than constant action. It can convert standard items like pain pills