Oh man, this is the best sale ever, I think. GOG has a buy one, get one free sale going for classic Dungeons & Dragons games (the really awesome ones). But there's just one more thing...
Buy any game and not only do you get one free, you also get the Temple of Elemental Evil for free. That's three games for the price of one. Three massive, epic, deep RPGs set in the best settings ever created.
So, what games are covered by this deal?
Baldur's Gate. Baldur's Gate II. Icewind Dale. Icewind Dale 2. Planescape: Torment. Neverwinter Nights. Dungeons & Dragons: Dragonshard. And Forgotten Realms: Demon Stone (an action hack and slash game penned by R.A Salvatore - the same guy behind Kingdoms of Amalur).
And the freebie, Temple of Elemental Evil.
So for the love of all things that are holy, if you've never played any of these games before, now is the time.