Duet Night Abyss builds its early game around a clear main questline, optional side stories that branch through Icelake, and a separate progression track for unlocking characters and gear. If you’re looking for “Quest” in Dead or Alive, that’s an unrelated mode from Dead or Alive 6 — more on that at the end. If you still need the game, you can install it from the Epic Games Store on PC at the Duet Night Abyss product page.

Duet Night Abyss main quests (Prologue and Noctoyager Chapter 1)

The opening acts establish core systems, introduce key characters around Icelake, and lock some progression behind specific milestones. Here are the story beats you’ll see in order.

Quest Key beats
Escape the Purgatorio Island Leave the cave, descend to the village, secure a weapon from a crate on the beach, fend off Filthoids, and search the coastline for a way out.
Burial Ground of Time Climb to the mountain ruins, test your weapon against Filthoids, investigate a statue and lift, open the gate, explore deeper, and hold off waves of enemies.
Whispers of the Sands Continue the airship search, defeat a large force of soldiers, escape while avoiding hazards, then face Sibylle.
The Reborn Follow Snow into Icelake, check in at the Hypnos’ House, reach the Asphodel, then complete the side quest “The Wandering Luno” to unlock Forging and proceed.
The Art of Survival Meet at Silverpeace Square, respond to a theft at the Asphodel, follow the trail from an alley to a rooftop, chase the culprit into the sewers, defeat them, and report back.
Crystallo of Stella Enter Glevum Pit via an alternate passage, read notes near powder kegs, place and detonate charges at marked crystals while fighting Filthoids, delve deeper, defeat the Crystalophile, and return to the gate.
The Secret Behind the Door Meet the Outsider, return to Sanctuary, investigate Hypnos’ House (including a conversation with Psyche and other lodgers), wait for Henrik, then deliver your findings.
Prey VS Hunter Prerequisite: complete the Commission “Mediation.” Speak with the Outsider, fight Filthoids to sharpen skills, speak again, and then protect a designated target.
On the Eve of Bloom Check on Psyche at the Hypnos’ House, scout Lamenting Lake for suitable soil, search deeper along the quest path, and bring the soil back.
In the Depths of Winter Prerequisite: complete “Prey VS Hunter.” Meet Snow, covertly tail Henrik outside town, meet the Outsider, check on Psyche, walk with Psyche at Lamenting Lake, dig at the roots, take a photo using the camera, return to Icelake, and defeat a suspicious soldier.
A Bouquet for a Maiden Prerequisites: complete “In the Depths of Winter” and “Dedicated Chef,” and reach Trial Rank 19. Wait by the ticket booth, investigate Hypnos’ House, follow a boy, enter Henrik’s office, prepare for a difficult fight, follow butterflies across Lamenting Lake, and defeat the Eclosioner.
On a Gentle Breeze Complete a sequence of reflective interactions (cleaning, stacking, crossing off, fixing), follow butterflies to “shatter the cocoon,” defeat Psyche, explore the Thawing Caverns, and step outside when sleep won’t come.
Note: Quest beats can be adjusted in patches, and some steps won’t appear until prerequisite systems unlock.

Side quests in Icelake you can pick up early

Side quests are optional stories that branch off the main arc and are available starting in Chapter 1. They’re taken from NPCs around Icelake and its districts.

Side quest Client (quest giver) Location
Dead Wood in the Sewers TBA Depths of Icelake Sewers, Icelake
Sewer Carnival Dutton Eastern District, Icelake
Little Researcher I Theo Eastern District, Icelake
The Greed Beneath the Sand Shirley The Asphodel, Icelake
To Those You Miss Miss Lisse Silverpeace Square, Icelake
The Gone Girl Elsa Silverpeace Square, Icelake
The Imperial Three TBA Glevum Pit, Icelake
Little Researcher III Theo Hypnos’ House, Icelake
The Unseen Horns Faye Eastern District, Icelake
The Bloodstained Stones Larry Icelake Sewers, Icelake
Clock No More Ticking Wells The Asphodel, Icelake

Main quest progression gates you’ll hit

  • The Reborn blocks progress until you complete the side quest “The Wandering Luno” to unlock Forging.
  • Prey VS Hunter won’t start unless you’ve cleared the Commission “Mediation.”
  • A Bouquet for a Maiden requires “In the Depths of Winter,” the side quest “Dedicated Chef,” and Trial Rank 19 before it appears.

Character and gear unlocks: Secret Letters, Thoughts, and Covert Commissions

Outside the quest log, character and equipment progression runs through a repeatable loop:

  • Characters, weapons, and Demon Wedges are claimed with Secret Letters after clearing Covert Commissions.
  • Covert Commissions sit at level 40; plan to push the story first and build one strong character before farming comfortably.
  • Completing a Commission presents three possible rewards from the Secret Letter’s pool; pick one. Gold-tier drops like bundles of 10 Thoughts are rare.
  • It takes 30 Thoughts to unlock a new character. Many characters also join through story progression, but Introns (power boosts) still require Letters to unlock.
  • For weapons and Demon Wedges, a single blueprint unlocks forging; materials for crafting drop from the same Letter pool.

Secret Letters are created from Secret Letter Clues. You’ll get a steady supply by finishing the main story and major side quests, then from endgame activities on a cadence:

  • Nocturnal Echoes weekly bosses hand out Secret Letters for current-featured characters.
  • Mystic Maze provides a weekly bundle of Secret Letter Clues.
  • Immersive Theater offers a large periodic payout of Clues and featured character Letters when cleared at high ratings.
  • Daily and weekly objectives add a reliable stream of Clues; keep up with these to avoid bottlenecks.

New characters follow a staged release path: featured Letters are available in Immersive Theater for 28 days, then rotate into Nocturnal Echoes, and later appear in the shop for Clue exchange. At launch, Psyche is featured in Immersive Theater with a large set of Letters for her and her weapon, while Nocturnal Echoes cycles Letters for other characters during the same window.

Cosmetic gacha: currencies, pity, and what to expect

Skins and outfits sit on their own gacha track separate from character and weapon unlocks. You’ll see a limited and a standard banner with different currencies and an exchange shop:

  • Pull currencies: Prismatic Hourglasses (limited) and Pristine Hourglasses (standard). Hourglasses come from events, logins, or direct purchase.
  • Every 10 pulls guarantees a purple-rarity item.
  • Hard pity at 90 pulls guarantees 25 Iridescent Prisms. Prisms can be traded for the featured skin and other cosmetics in the exchange.
  • Gold-rarity items drop at a very low rate (including the featured outfit and larger Prism bundles). Pity is banner-specific and does not carry over.
  • Some seasonal skins are sold outright for a fixed price during limited windows.

Dead or Alive 6’s “DOA Quest” is unrelated

Searching for “Dead or Alive Quest” points to a mode in Dead or Alive 6, not a feature in Duet Night Abyss. In DOA6, DOA Quest is a mission-based mode where each quest contains three objectives. Clearing missions grants in-game currency, and clearing all three per quest awards additional rewards. It has no tie-in or shared progression with Duet Night Abyss.

Early-game checklist for smooth questing

  • Finish the Prologue to open up Sanctuary and core systems.
  • Pick a carry character (the main character or Berenica are common choices) and funnel your early materials into that build.
  • Push the main story to Chapter 1, grab nearby side quests, and complete “The Wandering Luno” to unlock Forging when prompted.
  • Aim for Trial Rank 19 if you want to reach “A Bouquet for a Maiden” quickly; clear “Dedicated Chef” along the way.
  • Once your build is comfortable, start farming Covert Commissions for Secret Letters and Thoughts.

If you’re just starting out, prioritize the main quests listed above, pick up side quests as you pass their NPCs, and don’t touch Covert Commissions until your chosen character can comfortably handle level 40 objectives. The Story will hand you most of the cast and features at a steady rhythm; Letters and endgame loops fill in the rest.