I activated my Steam account the day the PC Big Box of "Half-Life 2" arrived at my home (November 25th 2004).
But the first digital game I bought on Steam was the rhythm game "Audio Surf" at November 5th 2008... already on sale (-72%) nine months after release.
The first digital game I bought on Steam "Day One" was the MI1-Remake "The Secret of Monkey Island: Special Edition", after that the collection "Indie Games big bundle" and the awesome "Trine" (which looked gorgeous in stereoscopic mode with my Nvidia shutter glasses):

Since the Christmas sale 2009 I am addicted to Steam. 









