Probably in preparation for FO3 back in 2007. Due to poor localization my reason didn't get it but by my soul I literally sank into the world of people survived nuclear apocalypse and their problems. Then I think after FO3 I got Fallout 2. Same story but the game felt more exhausting than enjoyable and rather disjoined. And sadly no post-apocalypse vibe at second glance. At first time I liked FO2 a lot though.