Beginner's Guide to Duet Night Abyss

Must know tips

• Level Up Trial Rank: Unlocks new missions, characters, and features; gain XP from dailies and commissions.
• Farm Secret Letters: Exchange clues to unlock or upgrade characters and weapons.
• Use Covert Commissions: Termination missions for kills and Exploration for serum collection help farm upgrades.
• Equip Demon Wedges: Mods that boost stats; farm from elite enemies and upgrade early to get stronger.
• Collect and Merge Geniemons: Provide team buffs and passive advantages.
• Complete Daily Memos: Quick quests giving XP and clues for steady progress.
• Focus on One Main Champion: Concentrate resources on a single character for faster early progress.
• Auto-Farming Efficiency: Some commissions can be farmed automatically, saving time.
• Learn Skills and Mods: Understand character skills and Demon Wedge effects to maximize damage.

Duet Night Abyss is a free-to-play hybrid action-RPG where you control agile characters in a world of magic and machinery. What makes it beginner-friendly: the game has removed traditional gacha mechanics — all characters and weapons can be unlocked through gameplay, not RNG pulls. The systems may still look complex, so this guide breaks down the most important ones and gives you a roadmap for early progression.

Progression and unlocks by Trial Rank

• The Trial Rank is your main account level, capped at 65. As you level up, you unlock new game content such as harder challenges, better shops, and rare materials.
• Early on, after completing the initial tutorial and story sections, you gain access to Covert Commissions, which are daily missions vital for progressing.
• Around Trial Rank 25, you unlock advanced game features like new Secret Letters (used for unlocking characters and weapons) and more difficult commissions.
• To access the “Covert Commissions” system, you need to progress to around level 40 through the story.
• Weekly bosses called Nocturnal Echoes are unlocked after you progress through early commissions. These bosses drop some of the best crafting materials.
• You gain Trial XP from completing daily quests, ascending characters, and participating in commissions. This XP helps you rank up and unlock further content progressively.

Weapons and characters: Secret Letter, Termination, Exploration

• You unlock 7 characters early through story mode; others are farmed via Secret Letters in Covert Commissions.
• Secret Letters are earned by exchanging Secret Letter Clues, obtainable from quests, daily tasks, shops, commissions, and achievements (exchange 10 clues for 1 Secret Letter of a given type).
• With that Secret Letter, you enter a Covert Commission (which has three categories: Characters, Weapons, Demon Wedges). You pick the appropriate one and run the mission. At the end, you choose one reward from three options – shards (“Thoughts”) for characters, blueprint for weapons, etc.
• Character unlock: You need 30 “Thoughts” to unlock a new character.
• Termination (kill missions) and Exploration (excavation missions) are key mission types in Covert Commissions; kill missions are faster for farming character shards.

Demon Wedges and Geniemons

• Demon Wedges: These are gear pieces you slot into characters/weapons for stat boosts. Each character/weapon has multiple Wedge slots (six slots according to one guide) and higher rarities grant better fixed stats.
• You can find Demon Wedges from elite enemies called Primeanders during the Expulsion commission, which is designed for farming these powerful mods.
• Upgrading Demon Wedges is crucial because they add substantial power boosts, including unique effects like faster sanity regeneration or increased skill damage.
• Geniemons are collectible organisms you capture using special bait. They provide passive buffs to your whole team and can be merged for stronger effects.
• Carefully deciding which Demon Wedges and Geniemons to farm early can make your characters much stronger as you progress through tougher content.

Daily Memos (Quests) and their importance

• The “Memo” tab (under Day Planner) shows daily tasks. Completing them gives you a Progress Score, and hitting the cap gives rewards.
• These quests could include killing a number of enemies, gathering items, or completing short commissions.
• By completing your Daily Memos every day, you steadily gather the resources and experience needed to rank up smoothly.
• Additionally, weekly commissions and boss fights offer extra valuable rewards like rare upgrades and crafting materials.

Below is an example list of tasks and scores:

How to Build Your Team in the Early Game

• It’s best to concentrate your resources (materials, upgrades, Divine Shards) into one main champion rather than spreading them across many.
• Equip this main character with the best possible melee and ranged weapons, optimized for their attack style and abilities.
• Use Demon Wedges and Geniemons that complement your main character’s skill set—focusing on increasing skill damage, attack speed, or survivability.
• Bring along two AI-controlled teammates that provide buffs, healing, or additional damage, supporting your main champion's damage output.
• Once your main champion is strong, start upgrading other characters slowly to diversify your team for different situations.

This approach balances fast progression and resource management, which is crucial in a game like Duet Night Abyss where upgrading characters and equipment is resource-intensive.

In conclusion, Duet Night Abyss rewards steady progression over grinding — nearly every feature, from characters to weapons, can be unlocked through gameplay. Focus on raising your Trial Rank, completing Daily Memos, and building one strong main character early on. With consistent play, you’ll gradually open up advanced systems like Demon Wedges, Geniemons, and Covert Commissions without ever feeling gated by luck or paywalls.

Read more:

• Duet Night Abyss 2025 Character Tier List
• The Complete Geniemon system in Duet Night Abyss Explained
• Your Guide to Covert Commissions in Duet Night Abyss