there are 2. The first expansion is called The Dark Below (set beneath the surface of the Moon), while the second is titled House of Wolves. Details about this expansion will be announced later. Buying the Destiny Expansion Pass will save you money, as the expansions will be sold for $20 each when released. There was no mention of when that will be. If u buy the season pass its 35 bucks. If you buy a limited edition version, season pass comes with the LE version.