Destiny 2: Shadowkeep

Shadowkeep is similar in scale to the original Destiny's fourth expansion, Rise of Iron, and features a "full campaign", two new multiplayer PvE "strike" missions, and one new PvP Crucible map, as well as two reused ones. The expansion features the Moon as a returning, playable destination, where it has been reprised and expanded upon its original patrol mode from the original Destiny. Bungie claimed that the Moon would be twice the size of its original iteration, featuring major changes to the lunar environment, including the erection of a massive Hive fortress on the lunar surface, the Scarlet Keep, that serves as a key area for the expansion. Eris Morn, a character from the original game who had been absent since the events of Destiny 2's base campaign, serves as the main non-player character (NPC) for Shadowkeep.

The expansion also introduces a new faction of enemies called Nightmares—spectral manifestations of the trauma from the Guardians' past that have been reanimated by the Darkness and have been accidentally unleashed onto the Moon by Eris. Nightmare enemies are mostly major story bosses from both Destiny and Destiny 2, as well as minor enemies from the Fallen, Hive, Cabal, Vex, and Scorn enemy races, made more powerful by the Darkness and can even regenerate their health. Nightmare enemies can also be found in Lost Sectors. A new raid mission, "Garden of Salvation", was released on October 5, 2019, and takes place in the Black Garden on Mars from the original game; the raid was tied to the expansion's first seasonal content offering, Season of the Undying, which focused on the Vex, who invaded the Moon as a result of players' actions during the raid.

One year after the death of Cayde 6, Shadowkeep focuses on Eris Morn, who had departed from the Tower and remained absent since the events of the Red War that occurred two years ago. Following the events of Season of Opulence, the Guardian is summoned to the Moon by Commander Zavala in response to a disturbance originating from a massive citadel recently erected by the Hive near the Hellmouth called the Scarlet Keep. As the Guardian makes their way to the keep, Ikora Rey contacts the Guardian and reveals that the disturbance was accidentally caused by Eris Morn while she was investigating the Moon, and asks them to find her. The Guardian enters the Scarlet Keep and descends to the caverns below in search for Eris.

They eventually discover a derelict alien vessel called the Pyramid (which was teased in the final cutscene of the base game), which Eris had discovered and accidentally activated. The Guardian tries to approach the Pyramid but is pushed back by a barrier emitted by the structure. The Guardian is then suddenly attacked by a phantasmal Nightmare of Crota, Son of Oryx, and an army of Hive; it is soon joined by Nightmares of Dominus Ghaul and Fikrul, the Fanatic, and they begin to overwhelm the Guardian. Eris then contacts the Guardian and teleports them away to safety.

Destiny 2: Shadowkeep received "generally favorable" reviews, according to review aggregator Metacritic.

Game Informer praised the new location, liking how it was transformed for the expansion, "It's fascinating to explore what has changed and what has stayed the same, even if it ultimately means that the “new” destination is mostly a rehash of somewhere we've already been". VG247 enjoyed how content was made more accessible, "Shadowkeep's content is available for every player who owns the expansion. There's a lot of grinding, sure, but it's the good kind; it's unlikely we'll see the weird, exclusionary and overly difficult experiences from Black Armory in future seasons". Destructoid felt the new gearing system was an improvement, but criticized the reuse of content in the expansion, "Bungie has come full circle when it comes to reusing old content, as the new zone — the moon — is basically recreated and restructured from Destiny 1, and the “new” enemy type — nightmares — are just existing baddies and bosses with red mist around them".