User blog comment:The Mysteryous user/Icebreaker: A Viking Voyage for Android devices!/@comment-24682750-20130725000422/@comment-24682750-20130725234146

Actually I think there were only three packs anyway. My point was that maybe they could release the game only with Hammerfest unlocked, but for the following two the player would have to pay. These two final packs being Troll Marsh, and Under Dwell.