After the Nightfall

This emblem unlocks after you beat the Time Trial times of each Nightfall Strike; these times need to be obtained after Forsaken's release. The site destiny.report has a great tool to track your Nightfall times, I've included the link below. Thanks to the "DestinyTheGame" subreddit for figuring out the times for each hidden Time Trial. Likely no longer obtainable after the release of Beyond Light and the DCV.

Gateway

Obtained via a code inside The Final Shape Collector's Edition. This is the CE exclusive emblem and is not a universal code.

The Lure of Flame

Obtained as a one-time use code in the Witch Queen Collector's Edition. Your unique code can be found on the back of the lenticular photo/postcard inside the Collector's Edition box.

Spoils of Ishtar

Purchase any qualifying Vault Of Glass-related item in the Bungie Store before they were retired. VoG items were no longer available for preorder as of the end of August, 2021.

Sign of the Gambit

Play Gambit during one of Bungie's Gambit preview events (pre-Forsaken launch). This was also a $10 donation reward during Bungie's pre-GuardianCon 2019 livestream.

Long Slow Whisper

Complete the Deep Stone Crypt within the first 24 hours of its release.

Emblem of the Fleet

Make a purchase in the Bungie Store between 2019-11-28 and 2019-12-09.

Lost in It

Redeem a code provided by SteelSeries' Twitter account, posted from 2020-08-27 to 2020-08-30.

Sunset Echoes

Handed out exclusively at Madrid Games Week 2019, taking place from 2019-10-03 to 2019-10-06. Thank you to a kind redditor for sending this info in!This was also handed out as part of a promotion on Bungie's Weibo page in 2019.

Through the Heart

Purchase something from the Bungie Store during Season 10, Season of the Worthy.

Apeirohedron

Purchase something from the Bungie Store during Season 13. This emblem is missing some info in the API, which is why it looks a little odd here.

Archivist's Prize

Purchase the "Destiny Grimoire Anthology, Volume II: Fallen Kingdoms" book. The emblem code will be inside the book.

Hubris of Niobe

Complete the full Niobe Labs puzzle; once complete the emblem will drop. No longer obtainable after the forges entered the DCV.

Ooo Shiny

Awarded as a Twitch Drop during the Echoes Act II developer stream, taking place on 07-09-2024 at 10AM Pacific. Watch for 15 minutes to get this Drop.

Anomalous Signal

Purchase anything on the Bungie Store during Season of the Undying.

Warminded

Obtained by accessing all forty (40) Sleeper Nodes on Mars. No longer obtainable after Mars entered the DCV.

Threads of Light

Purchase something from the Bungie Store during Season 14.

Operation… Oboe?

These emblem variants can drop once you reach a certain score threshold in a Nightfall. The drop rates are unknown, but if you are looking to get this variant, you'll want to go for a high score run (get the highest score possible) in the related Nightfall, then do speedruns of the Nightfall until the emblem variant you want drops. Note this is a variant of the emblem named after the Nightfall it drops from.

Ultraworld

Purchase any item from the Bungie Store during Season of Dawn (Season 09).

Simulant Spring

Complete all Triumphs during the Revelry 2019.