Curse of Osiris

Curse of Osiris is the first DLC expansion for Destiny 2, and was released on December 5, 2017. Curse of Osiris takes place on Mercury and follow the Guardian's efforts to rescue Osiris from the Vex in order to avert a dark future. The expansion's plot also focuses on the relationship between Osiris and his disciple, Ikora Rey.

Story Missions

 * The Gateway
 * A Deadly Trial
 * Beyond Infinity
 * Deep Storage
 * A Garden World
 * Hijacked
 * Tree of Probabilities
 * Omega

Adventures

 * The Up and Up - Stop the Vex from gathering data on Fallen combat tactics.
 * Bug in the System - Ruin Vex plans to gather data on the Hive and their Sword Logic by eliminating as many of them as possible.
 * The Runner - Stop the Vex from accruing data on a Cabal Colossus carrying important data trapped in a maze.

Strikes

 * A Garden World
 * Tree of Probabilities

Raid

 * Raid Lair
 * Leviathan, Eater of Worlds

Crucible Maps

 * Pacifica, New Pacific Arcology, Titan
 * Radiant Cliffs, Fields of Glass, Mercury
 * Wormhaven, New Pacific Arcology, Titan

Locations

 * Fields of Glass, Mercury
 * Hangman's Pass, European Dead Zone, Earth
 * The Light House, Fields of Glass, Mercury

World Quest

 * Legends Lost

Trivia

 * The Story missions A Garden World and Tree of Probabilities have the same name as the Strikes that take place in the same locations.
 * The World Quest for Mercury had been teased and according to datamined info is obtainable after completely forging all available weapons at The Light House forge.