Green Man Gaming has for New Customers: Destiny 2 Expansion Pack (PC Digital Download) for $31.49 - 15% w/ voucher code NEW15 = $26.77. Thanks imprezastipwr
Note, includes both Destiny 2 - Expansion I: Curse of Osiris & Destiny 2 - Expansion II (coming spring 2018).
Expansion I: Curse of Osiris features:
Explore Mercury and its mysterious "Infinite Forest"
New story missions and adventures
New themed weapons, armor, and gear to earn
New cooperative activities
New competitive multiplayer arenas