Broken Sword 2+3 pack, $10US this weekend on GOG
http://www.gog.com/en/frontpage/pp/92cfceb39d57d914ed8b14d0e37643de0797ae56
This is an incredible deal. Shadows of the Templars is still probably the best of the lot, but these two are still fantastic. I have a soft spot for 3 in particular, one of the more successful transitions into 3-D for adventure gaming.