You have from right now until Wednesday at 10AM (PT) to pick up Amnesia: The Dark Descent for FREE. Once you add it to your Steam list, it is yours to keep forever and you will never be charged for it.

Again. Free game. Get it now or be really sad when it's no longer being offered for free after tomorrow at 10AM (PT).

If you like what you play, be sure to check out the Frictional Games sale going on right now on Steam. Save 80% off of Amnesia: A Machine for Pigs or 80% off of the Penumbra pack.