If you're a fan of Spiderweb Software's sprawling role-playing games, but are missing quite a few titles in your collection, then you may want to pick up the newly released Spiderweb Software Complete Pack on Steam. It's missing the first Avernum trilogy and a couple of their oldest titles, but you're still getting eleven games and hundreds of hours worth of content for $39.99.
It's likely going to be even cheaper later this month, too, when Valve kicks off the inevitable holiday sale.