One of the best RPGs ever made. A golden oldie I like to call it, but beats the crap out of modern 'RPGs'.
One of the reasons why it's great is probably because of its setting: Retro futuristic game, the future envisioned in the 50s era.
The story is superb, I won't go into this, don't want to spoil it.
Gameplay is turn based, now I'm not a big fan of TB combat (even though one of my favourite games is Disciples II), but in FO the TB blends in well.
The characters are 3D, and I don't mean graphically. They've got character, you'll remember them years after you've stopped playing the game.
In short, if you're a *real* CRPG fan, get this game, better yet get this game and its sequel, Fallout 2. Though FO1 is better IMO.
Graphics are a bit out-dated, yes, not that they matter in an RPG, but the following resolution pack will make the game look quite sharp on 1024x768 resolutions plus.
http://www.nma-fallout.com/forum/dload.php?action=file&file_id=1160
Also, don't forget to install this patch: http://www.nma-fallout.com/forum/dload.php?action=file&file_id=1076
Happy gaming.