In anticipation of the upcoming expansion Gods & Kings, Valve has announced the following: Kick off the weekend by playing Civilization V for FREE starting now until Sunday at 1PM Pacific Time. You can also pickup the entire Civilization V franchise this weekend only at 75% off the regular price! Sale ends Monday, May 28th at 10AM Pacific Time. So if you haven't tried the game, now's a great chance to while away the weekend getting in as many hours as possible before the sale ends! Many thanks for CoolLizy for bringing this to our attention by posting about it here.