This is an add-on with a very well-developed plot (as well as variability in some tasks). I liked walking along the dead streets and fighting off the poisonous fog and enemies, bit by bit collecting information about the Sierra Madre casino, the motives for its creation and the secret secrets of its creator. If you pass, then my advice to you is; Don't save inside the poison cloud! The game will then get bugged and will take away HP from the character throughout the entire game. The bug is fixed with two commands in the console (these achievements will not stop falling from these commands). resetquest xx00e882, resetquest xx00c543. xx at the beginning - the number of this DLC in the list (you can find it in the main menu of the game by going to the "Add-ons" tab). For example, I had it fourth and I wrote 04 at the beginning. I hope it helped someone)