Osmium Heir

Awarded from content creator giveaways during Episode 03: Heresy.

Follow the Light

Awarded by winning a giveaway. It appears that codes were delivered mostly to Destiny 2 content creators.

Second Mark of the Collector

Purchase one of The Series 3 Ghost Collectible Pins and the emblem code will come attached to the pin.

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.

Aurora Clash

Compete in a Year 3 Bungie Bounty and win.

Cybernetic Bloom

Purchase The Armory Series 4 Collectible Helmet Pin from the Bungie Store. An emblem code should come in the package.

Gilded Remembrance

Obtained by purchasing the Moments of Triumph 2022 shirt or patch from the Bungie Store.

Heimdallr's Holler

Obtain Gjallarhorn then purchase the "And Out Fly the Wolves" pin from the Bungie Store.

Silicon Frontier

Awarded as a Twitch Drop during The Pantheon Creator Challenge on 2024-05-28

Royalty

Guide ten (10) Guardians through their first Destiny 2's King's Fall raid, then redeem the emblem from Bungie Rewards.

Exotemporal

Complete the Vault of Glass "Tempo's Edge" Triumph, which requires you to complete Vault of Glass and all of the encounter challenges within the first 24 hours.

Knit One, Purr Two

Purchase any qualifying item from the Bungie Store during Episode 03: Heresy.

Tyrant

Obtained after clearing the King's Fall raid and all encounter challenges within the first 24 hours.

Luminescent Precision

Comes in the box with a SteelSeries Destiny 2: Lightfall Edition peripheral. Qualifying items appear to be the Acrtis 7+ headset, Aerox 5 wireless mouse, thumbstick grips, and the QCK Prism XL mousepad. Link to the SteelSeries store below.

A Broken Throne

Clear Crota's End during the 48 hour Challenge Mode window.

Bully Pulpit

Awarded as a Twitch Drop during The Pantheon Creator Challenge on 2024-05-21

Harmonic Waves

Purchase the "Stand with Asians Collectible Pin" from the Bungie Store. Was previously available as a donation of at least $10 to the Bungie Foundation during their AANHPI Heritage Month fundraiser.

Huygens' Trove

Purchase any qualifying item from the Bungie Store during Season 21 (Season of the Deep).

Black Skies

Purchase anything on the Bungie Store during the week of Black Friday 2018.

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.