Duet Night Abyss character unlocks — Secret Letters, events, shop
Duet Night AbyssHow to use Secret Letters, claim guaranteed launch characters, and build a roster without gacha.
| Method | What it yields | Key steps |
|---|---|---|
| Secret Letters | Targeted character unlocks | Farm clues and letters, run Covert Commissions, collect Thoughts, unlock via Reminiscence |
| Launch event rewards | Guaranteed free characters and gear | Clear milestone tracks in launch event tabs (e.g., Immersive Theatre) |
| Farming (repeatable modes) | Characters and signature weapons | Route daily/weekly play into tracks for the unit you’re targeting |
| In‑game shop (Thoughts) | Direct character purchases | Exchange 150 Thoughts to buy a unit outright |
| Story progression | Early companions | Advance the main campaign to trigger set unlocks |
Character acquisition is deterministic. There’s no traditional gacha or stamina timer; your playtime flows into objective tracks that culminate in guaranteed claims.
Install and find the unlock menus
- Install Duet Night Abyss from the official site once available in your region: duetnightabyss.herogame.com.
- After the tutorial, open Events to activate launch reward tracks.
- Open the character acquisition menu to access Secret Letters and related objectives.
Secret Letters — how they work
Secret Letters are character‑specific. To recruit a particular unit, you must obtain that unit’s Letters; Letters for other characters do not convert.
Progress happens by opening a Letter and completing a matching Covert Commission run. These runs award selectable loot, including the currency that matters for unlocks: Thoughts.
How to get Secret Letters and Secret Letter Clues
- Daily Commissions and Quests: Earn Secret Letter Clues, then exchange them in the shop at a 10:1 rate (10 Clues → 1 Secret Letter).
- Achievements: Additional source of Secret Letter Clues.
- Nocturnal Echoes: Drops Letters for all available characters.
- Immersive Theatre (time‑limited): Drops Letters only for the featured new character during its window.
Plan your play so routine tasks generate Clues while limited‑time modes feed Letters for current targets.
Run Covert Commissions and convert to a character
- Go to Combat → Covert Commissions, select the Secret Letter for the character you want, and start the challenge.
- On the reward screen, pick Thoughts to advance recruitment for that specific character.
- First unlock requires 30 Thoughts for that character; claim the unit through Reminiscence once you reach 30.
- Have surplus Letters? Recycle them to recover Secret Letter Clues and retarget your progress.
Guaranteed free characters from launch events
During the launch window, several characters are claimable through event tracks with no randomness. Prioritize these while you farm Letters in parallel.
| Character | How to obtain at launch |
|---|---|
| Berenica | Launch event claim track |
| Rebecca | Launch event claim track |
| Outsider | Launch event rewards |
| Daphne & Lisbell | Launch event rewards |
| Truffle | Launch event rewards |
| Filbert | Launch event rewards |
Event tabs can rotate during launch. Look for banners or tracks highlighting launch rewards and Immersive Theatre.
Story progression character timeline
- Margie joins early as a companion during the main story.
- Berenica and Rebecca unlock shortly after you reach Sanctuary, the primary hub.
- Outsider and Truffle & Filbert unlock later as you move deeper into the campaign.
Buy characters directly with Thoughts
If you’d rather skip runs for a specific unit, the in‑game shop lets you exchange 150 Thoughts to purchase a character directly. This uses the same Thoughts currency you earn from Covert Commissions.
Farming characters and weapons without gacha
Repeatable modes and event tracks cover both units and their signature gear. At launch, Psyche Fina has an explicit farm route alongside a weapon track, demonstrating how character and equipment paths can align. Set your target in the relevant menu so all play funnels into the right track, then leverage event windows to speed up milestones.
Use free claims to balance elements, weapons, and roles
| Category | Options |
|---|---|
| Elements | Pyro, Anemo, Hydro, Lumino |
| Weapon proficiencies | Sword, Dual Pistols, Whipsword, Assault Rifle |
| Team roles | DPS, Support, Control, Heal |
A stable early team pairs one main DPS with a Control or Heal unit, then fills the third slot based on content. Use launch characters to cover gaps in roles or weapon types you prefer.
Fast start checklist (day one to week one)
- Install and launch the game, then claim any day‑one rewards in Events.
- Activate the Secret Letter track for your top‑priority character immediately.
- Route dailies to earn Secret Letter Clues and exchange them at 10:1 for Letters.
- Run Nocturnal Echoes for universal Letters; clear Immersive Theatre for the featured character.
- Always select Thoughts in Covert Commissions until you hit 30 for your first unlock.
- Use launch event tracks to secure guaranteed characters while your farm continues in parallel.
- Check whether your target has a linked weapon track so you don’t split progression.
The loop is straightforward: set a target, feed it with Letters and event progress, and convert runs into Thoughts until you can claim the unit. With a few days of focused play, you’ll lock in multiple characters without spending or waiting on energy timers.
Comments