- "Complete the episode without reloading the game or restarting a checkpoint. "
- "You made it through The Signal in one glorious go."
To earn this achievement, you literally need to complete The Signal without ever dying or restarting a checkpoint; that even means quitting the game and coming back to your saved game. You are best to complete this episode on the easiest difficulty. A lot of the enemies in the first half can easily be parsed by using flares.