Steam is having another summer sale, which if you remember previous year's sales, tends to have some pretty good offers. Yesterday's big ones were Recettear for €4, and Oblivion for €9.
Todays big ones are KOTOR for €3 and Shogun 2 for 40% off and Just Cause 2 for €5. However I did find that Shogun 2 was 60% off in Amazon UK, which meant it was actually cheaper there, so don't forget to shop around just because Steam has a sale on.
Anyone else buy anything interesting in the sales?