For the next 48 hours, GOG.com (formerly known as Good Ole Games) is literally giving away the original Fallout game. No really, it is free. The only catch is that it's for PC only (sorry, Mac owners) and you need a GOG.com account.
So if you have a hankering to RPG like it's 1997 and you have a PC that runs at least Windows XP, go snatch Fallout. I've never been interested in playing Fallout before, but I'm tempted to boot up the Bootcamp partition on my Mac to snatch it for free. I like free way too much.