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.

Golden Hour

Added in Season of the Seraph (Season 19). Unknown how to obtain yet.

Master Guide

Source: Guided Games Final Encounters

Journeyman Guide

Guide 25 encounters in raids as a Guided Games guide.

Secret Signal

Added in Season of the Seraph (Season 19). Unknown how to obtain yet.

Solar Flair

Purchase the Bungie Day 2022 Shield Pin from the Bungie Store.

Broadcasting from the Dark

Awarded after subscribing to a Destiny 2 streamer during the Vesper's Host Dungeon Race, taking place from 2024-10-11 at 9:30AM PT to 2024-11-13 at 10AM PT. Please note that Twitch Prime subscriptions have not worked for emblems like this in the past.

Apprentice Guide

Source: Guided Games Final Encounters

Darkstar

Purchase any qualifying item from the Bungie Store during the 2023 Black Friday sale. Purchase window is from 2023-11-24 @ 9AM PST to 2023-12-01 @ 9 PM PST.

Silicon Frontier

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

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.

Compassion Concentric

Obtain this emblem by redeeming one (1) Credit during the Game2Give 2024 Fundraiser.Previously: Awarded for donating $25 to the Bungie Foundation Turkey/Syria Earthquake Relief fundraiser.

Neophyte Guide

Source: Guided Games Final Encounters

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

Tabula Rasa

Awarded from content creators starting in December 2023.

Swift Fortuna

Purchase any non-digital item from the Bungie Store during Black Friday Week 2021. Ends December 7th, 2021.

A Distant Howl

Purchase the NERF LMTD Gjallahorn from the Bungie Store. Emblems will be sent digitally upon shipment of the physical NERF Gjallarhorn.

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.

Traveler's Wish

Obtained as a Twitch Drop from The Bungie Foundation's official Game2Give livestream, which streamed on 2024-02-01 at 10AM PST.