Penumbra: Black Plague -

: Unlike other items, the gas mask does not expire. Keep it ready for areas filled with toxic gas, which can kill you in seconds.

In Black Plague , you are largely defenseless and must rely on your wits to stay alive. Penumbra: Black Plague

: Use the game's physics system to your advantage. You can block doors with heavy objects like crates or barrels to buy time while escaping from the Infected. Key Early Puzzles : Unlike other items, the gas mask does not expire

Many puzzles require interacting with the environment in creative ways. Penumbra Black Plague Puzzle Guide - Steam Community : Use the game's physics system to your advantage

: Use your glowstick as your primary light source; it never runs out and is less likely to alert enemies than the flashlight. Save your flashlight batteries for pitch-black areas where the glowstick isn't enough.