Call of Cthulhu: The Card Game – The Mountains of Madness Asylum Pack (2008)

Game description from the publisher:

The Mountains of Madness is themed around the H.P. Lovecraft short novel of the same name about a doomed Miskatonic University research expedition to Antarctica. This Asylum Pack – a supplemental set of 40 fixed cards for Call of Cthulhu: The Card Game – features Polar events, Alaskan Sledge Dogs, Antarctic Monsters, and more!

Update, 2010:

For the second printing of The Mountains of Madness, FFG is updating this expansion from 40 cards to 60 cards (three copies each of 20 different cards). The card text has also been updated where needed to account for the most recent FAQ and errata.