The most depressing part of Fallout with a small (un)cozy little world where almost everyone wants to eat you, kill you, rob you, tear you apart, etc. This part best reflects what could happen after a nuclear war. Thus, it becomes almost a warning to humanity.
Even everything here, absolutely everything, the endings are unrealistically depressing. Even if you did everything correctly, you will still be kicked out of the shelter and you will not be able to stand it and shoot its boss, after which you will go on to wander through the Californian wastelands. What can we say about worse endings.
Moderate gameplay, atmospheric graphics style and sound, a story that gives you goosebumps.
Lack of pathos inherent in the new parts of Fallout.
The design of the enemies is really creepy, and not cartoonish, as in the same third part.