Yeah, so the main quest is entirely summed up with 1, find father; 2, help father; 3, save world. While there are many, many games that would boast a similar plot, Fallout 3 has one of the most boring and, frankly, depraving main quests I have ever played through. There are no highlights. None. I saw some potential but it was sadly ruined by the fact that Bethesda is a bunch of lazy and incompetent fucks, unable to provide intelligent entertainment that makes sense. Take the main gist of the plot for example; building a huge, very complex machine for something as simple as water purifying. Treating it as some kind of difficult high level science magic bullshit that nobody ever even thought about is only the tip of the huge Mount Everestian diarrhea iceberg. It just screams ”shit shit shit we need some epic-sounding plot and we need it fast!” Perhaps Bethesda didn't know how water purifying works (hint: in Resident Evil 4 it would be a puzzle solved like ”use water with earth”) or maybe they didn't think their beloved audience would know how it worked. Either way; you fucking suck, Bethesda. And your fans suck too.​