Icewind Dale II: Adventure Pack is a special gift given by the publishers of the core game Icewind Dale II. The package includes Bonus CD which contains 11 bonus items sold by two merchants. Bonus items were included in the normal game through the final patch.
The Icewind Dale II: Adventure Pack was free of charge with a pre-order of Icewind Dale II, and afterwards it was also given away with the Collector's Edition purchase in some online stores.
