Those tricky folks at Valve. They love to make us go crazy with their mid-week sales at their Steam download service. They have already launched a week-long THQ-based sale event. Now from today until Friday they have put all of Firaxis Games' Civilization IV titles on sale in one bundle for a super-low price.

That means you can get the original turn based strategy game, the Warlords expansion pack and the stand alone games Beyond the Sword and Civilization IV: Colonization for the low, low price of just $19.99. That's 50 percent off the regular bundle price and a whopping 75 percent off if you tried to buy each game individually.