Fallout is a
roleplaying computer game developed by
Black Isle Studios and distributed by
Interplay. It is set after a three-hour
nuclear war in 2150 destroys civilisation. You play a survivor from Vault 13, the first person to leave the vault in 50 years. You must recover the
water chip that the
vault needs to survive.
The game is one of the most original roleplaying games ever. Although the game is set in 2150 or so, it's got a 1950's aesthetic feel to it (you know the age of duck and cover to protect yourself from a nuclear bomb). It's also got a wicked sense of humour, not to mention wanton violence, especially if you choose the Bloody Mess trait for your character. It's got lots of in-jokes and it's really the humour that hooks you in.
Although released in 1995, it still seems fresh today. A sequel (surprisingly named Fallout 2) was much of the same, but still very good.