The Dead or Alive quest in Duet Night Abyss unfolds inside Lonza Fortess, a military base deep within the Sand Realm. Following the events of the “Overlookers” mission in Twilight Chapter 1, the Sand Realm Dream captain finds themselves trapped inside the besieged fortress as enemy forces close in. With Daphne providing critical backup, your goal is to fight through Narwhal Soldiers, restore access systems, and escape through the flooding sewers before the entire stronghold collapses.

How to complete the Dead or Alive quest

Step 1: Defeat the Narwhal Soldiers

The mission begins with an ambush inside Lonza Fortes. You’ll face 17 Narwhal Soldiers and encounter the Elite Sergeant for the first time — an enemy commander who rallies nearby troops, increasing their attack and defense. Focus on eliminating the Elite Sergeant early to make the fight more manageable. Once cleared, the area will stabilize briefly before the next objective triggers.

Step 2: Use the control panel to open the gate

After defeating the soldiers, move left toward the corridor where your fallen squadmates lie. Once the short scene plays out, head right to locate the control panel near the power junction. Activate it to open the gate leading deeper into the fort’s restricted section.

Step 3: Retrieve the lift authorization key

You’ll soon reach a locked lift terminal that requires special clearance. The Lift Authorization Key is carried by an Elite Sergeant nearby. Defeat this opponent, collect the key, and return to the control terminal to access the lower levels of the fortress. There are 3 Elite Sergeant that spawn along with the enemies.

Step 4: Escape the fortress through the sewers

After using the lift, you’ll enter Lonza Fortes’ sewer system — a dark, partially submerged tunnel network now overrun by enemies. Here, the objective changes to preventing the place from flooding completely.

Step 5: Protect the drainage system

The final phase takes place in the lower drainage chamber. You must drain three valves to stop the rising water and stabilize the system. To activate a valve, repeatedly press the interact button until it fully drains while holding off attackers. You’ll need to multitask — protecting the valve while ensuring the drain completes uninterrupted.

Step 6: Wait for the water to drain for operating other 2 valves

You need to wait in defense of the main valve first to open the other two vales just below the area. Once the water has receded jump below to open the valves on the two sides.

Tips for completing this quest

Tips

Use Auto-Attacks Smartly

The game lets you chain auto-attacks when enemies are in range. Using them frequently builds your combo meter and sets you up for stronger attacks.

Dodge Wisely

Rather than spamming dodge, use it when you see strong enemy animations or area attacks incoming. Managing your dodge cooldowns matters.

Switch Between Melee & Ranged Weapons

Since you can carry both types, assess the situation: distant enemies → ranged, close-quarters → melee. Making the right switch keeps you effective. LDPlayer+1

Upgrade / Build Your Character and Gear

Fighting well also means being appropriately geared. Level up your character, upgrade weapons, equip Demon Wedges (gear enhancements) so you’re not under-powered when harder fights hit.

Focus on High-Priority Enemies

If you encounter enemies that buff others (e.g., morale-boosters or support types), target them early so the rest of the enemy group is less dangerous.

Once all three valves are drained, a cut scene appears with Daphne's backstory and our main character being interrogated by the warden Hellfire. With that starts the quest, The Judgement Day. There are no rewards in this quest as it immediately starts with our final quest in this chapter.