Duet Night Abyss has taken a unique approach compared to traditional gacha games. Initially planned as a typical gacha title, it shifted its mechanics prior to launch, allowing players to obtain every character and weapon for free. The gacha system now primarily exists for cosmetic skins, both limited and standard, rather than core gameplay elements. This change has nudged the game closer to an MMO-style experience. While it doesn't feature extensive multiplayer interactions, it does involve considerable grinding to reach endgame content efficiently. Here are several strategies to help reduce unnecessary grind and optimize your progress.

Save Your Prismatic Hourglasses

Although characters and weapons are free, the gacha system still exists for limited skins, which require Prismatic Hourglasses. Importantly, any unsuccessful attempts on a limited skin banner do not carry over to the next banner. This means wasted pulls if you fail to get the golden drop. Limited skin banners have a pity system of 90 pulls for guaranteed success, but obtaining sufficient Prismatic Hourglasses is slow for free-to-play players. Apart from a few launch events, most banners provide roughly ten Hourglasses through daily logins, with occasional additional amounts from events. Therefore, if you don't spend real money, acquiring all limited skins is nearly impossible. Free-to-play players are advised to save Hourglasses for skins they plan to use long-term.

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Focus on Key Characters

With all characters freely available, a common early-game mistake is overextending resources across multiple units. At launch, players receive an abundance of currency and upgrade materials, including coins and Secret Letter Clues. However, post-launch, these resources become scarce, making it inefficient to spread upgrades across numerous characters. Investing heavily in a few favorite characters—referred to as vertical investment—ensures you develop top-tier units capable of handling endgame challenges like Immersive Theatre. Prioritize upgrading Intron and Smelts for your main characters and their preferred weapons rather than attempting to upgrade everyone equally.

Complete Daily Tasks

Duet Night Abyss provides a Day Planner system within the combat menu, featuring a Beginner's Guide and Memo. While the Beginner's Guide offers a series of initial rewards, the Memo resets daily and provides valuable items. Players can reach 200 points on the Memo by completing simple daily tasks, and even minimal participation ensures steady rewards. Completing at least one Covert Commission daily is enough to make progress without investing excessive time.

Master Character Skills and Mechanics

Combat in Duet Night Abyss revolves around hack-and-slash gameplay with waves of enemies constantly appearing. While basic attacks may suffice during early content, endgame modes demand a deeper understanding of character abilities. Each character's skills and ultimates contribute significantly to damage output. For example, Sibylle's basic attacks are sufficient in early stages, but her true strength lies in her skills and ultimate. Understanding your characters' and partners' abilities enables effective synergies, such as pairing a main character who boosts weapon damage with Sibylle, rather than one offering a less useful ATK bonus.

Timing Your Attacks

After completing the prologue, players encounter bosses with two bars: HP and combat stance. Depleting the combat stance stuns enemies and increases damage taken by 1.5 times. The Ask's Retribution ability, which deals true damage, should be reserved for the moment when the enemy's combat stance is about to break to maximize efficiency. Premature usage lowers overall damage output.

Optimize Character Builds

Weapon choice significantly affects performance. While characters are flexible, using their preferred weapon type provides a damage boost. Among these, signature weapons are especially effective and should be prioritized. Additionally, progressing toward specific Demon Wedges for your main characters further enhances their potential.

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Consistently Attempt Endgame Modes

Once the main story is complete, Mystic Maze and Immersive Theatre serve as primary sources for upgrades and rare items. It's beneficial to tackle these modes as soon as they unlock, striving for higher scores to complete weekly resets and maximize rewards before featured characters rotate.

Explore Thoroughly

Even after finishing all visible quests, Duet Night Abyss offers ample exploration opportunities. NPCs with chat or quest symbols provide additional rewards, hidden quests, and opportunities to gain impressions. Collectibles, chests, treasure maps, and Advenspheres are scattered across the world, often yielding Secret Letter Clues and other valuable resources. Exploring thoroughly ensures you can obtain more copies of characters and weapons efficiently.

By following these strategies, you can make steady progress without feeling overwhelmed by grind. Duet Night Abyss rewards thoughtful planning and persistence, so taking the time to optimize your approach will not only help you reach endgame content faster but also make the journey more enjoyable.