It might be THQ Week at Steam but that doesn't stop them from offering deals on other companies' games. Sid Meier's Civilization IV is now 50% off until Friday.

The deal only applies to Civilization IV: The Complete Edition, the bundle of all four Civ IV releases. The base game, the Warlords and Beyond the Sword expansion packs, and Colonization (a remake of a 1994 Meier game) can now be purchased together for $20 instead of the usual $40. All the individual titles in the bundle are still priced normally.

If you're still not keen on this digital distribution business, you can find The Complete Edition in stores as well. 2K Games released a boxed version in May. No sexy discount on that, though.