I might be biased, i played it as a teenager back in the late 90s, but IMO Fallout is the best game ever created. Closely behind it (or ex aequo) is Fallout 2 (bigger, technically better, but lost a bit of it's personality), DeusEx (the original one) and Vampire the Masquarade: Bloodlines. This version is the censored one, but don't hold it against it. It's still Fallout. And it will forever be the best game ever made.
