I played Oblivion and thought that was superb and Fallout is different but every bit as good.
You dont seem to have the customisation of Oblivion but the fighting in Fallout is so much better and more fun.
So briefly. The game is set in a post nuclear war setting. Like Oblivion it is very freeform enabling you to wonder off anywhere in the world. There is a main quest but frankly I have more fun with just goofing around with the side quests.
It is a role playing game, meaning you have character attributes which as you level up, you can choose what to improve on. Unlike Oblivion , you are not constrained by a class.
The game is largely designed so that there is more than one way of achieving a goal. For instance, if a character has something you want, you could always kill him, or steel from him, or smooth talk him or do it the old fashion way and do his quest.
Ive few gripes. There is an element of swearing that seems completely unnecessary, making it awkward to recomend to a younger audience (the game is 18 after all). I'm not a prude, I love GTA but I think it really doesnt add to the game in Fallout.
Another gripe is the map seems really quite rubbish.
Last gripe, I'm suffering from sleep deprevation because of it. I would have finished a game like Resistance 1 & 2 several times over the amount of hours I've spent on it.
If you like the idea of a character building roleplay game but with some modern weaponary, like the ability to play the game none linearly, this could be the game for you.
I was nagged into buying this game and no regrets. Wish I bought the Collectors Edition. Love to have the Bobblehead :)