One of the best RPGs. Not only of its time, not only among marching or post-apocalyptic ones, but, in principle, among everyone.
No one else could replicate that atmosphere of decline, anarchy and hopelessness, although there were not one or two good games.
Wasteland, raiders, skirmishes, mutants of various stripes, thirst for profit and abandoned objects of that previous, already dead world, make up a complete and reliable world from which it is impossible to tear yourself away.
The possibility of different solutions to quests has risen to a qualitatively new level, when the same problem can be solved in at least two different ways, and often not only by killing or persuading, but also by bribing, stealing, framing...
If exhale and briefly summarize, then we have one of the best games, the best RPGs. And what could be better than Fallout? Only Fallout 2!