Abyss Roblox Angler Cave Guide: Lightkeeper, Pirate Key, Ruined Gun, and Tube Location

What to know

• Angler Cave is locked behind the Lost Captain’s full questline.
• Completing the final quest rewards you with the Pirate Key, required for entry.
• Inside the cave, you can purchase the Ruined Gun and Tube mobility item.
• The Ruined Gun offers high burst damage, while the Tube significantly boosts movement speed.

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If you have been exploring the dark waters of Abyss and wondering how players are getting their hands on the Ruined Gun and Tube, the answer lies inside a hidden location called Angler Cave. You cannot simply stumble into it. Access is locked behind a full NPC questline, and you must complete every requirement before the cave becomes available.

The entire process revolves around the Lost Captain, an NPC who acts as the gateway to this hidden content. Once you finish all his missions, you receive the Pirate Key, which unlocks Angler Cave and gives you access to some of the strongest early-to-mid progression equipment in the game.

Abyss Angler Cave unlock process

Requirement	Details	Why It Matters
NPC Required	Lost Captain	Unlocks the entire quest chain
Key Item	Pirate Key	Opens Angler Cave entrance
Location Unlocked	Angler Cave	Hidden equipment shop
Main Rewards	Ruined Gun, Tube	Damage boost and mobility upgrade
Entry Condition	Complete all Captain quests	No shortcuts available

Location of the Lost Captain and how his questline works

The Lost Captain is located in one of the early accessible ocean-side or dock regions of the map. When you open your map, you can identify his location marked near coastal structures. You must physically travel to him and initiate dialogue to begin the quest chain. This is not a single-task mission. The Captain assigns multiple objectives that typically involve exploration, defeating enemies, retrieving specific items, or clearing hostile zones.

Each quest must be completed sequentially. If you attempt to access Angler Cave before finishing every mission, the entrance will remain locked. The final mission in the chain rewards you with the Pirate Key, which is the only method of unlocking the cave.

Because this questline serves as a progression checkpoint, the game effectively ensures you are strong enough before granting access to the Ruined Gun and Tube.

How to unlock Angler Cave after obtaining the Pirate Key

Once you receive the Pirate Key, you can travel to the Angler Cave entrance. The cave is located along the rocky coastline in a dimly lit section of the map. The entrance appears sealed until you interact with it while holding the Pirate Key in your inventory.

Step 1

Travel to the coastal area where the cave entrance is located. The entrance is embedded into rock terrain and appears locked.

Step 2

Ensure the Pirate Key is in your inventory. If it is stored elsewhere, the interaction prompt may not trigger.

Step 3

Interact with the locked entrance. The game will automatically consume or register the key and unlock the Angler Cave.

Step 4

Enter the cave and proceed deeper inside. You will eventually reach the internal vendor area where the Ruined Gun and Tube are available for purchase.

There are no additional puzzle mechanics once you have the key. The unlock is straightforward, but only available after full quest completion.

What makes the Ruined Gun valuable in combat

The Ruined Gun is a ranged weapon that delivers strong burst damage, making it highly effective against mid-tier enemies and certain bosses. Compared to starter weapons, it provides noticeably improved output per shot, allowing you to eliminate threats faster and maintain safer distance during encounters.

Its main strengths include high damage scaling and reliable projectile behavior. Players often use it to speed up farming runs or handle tougher underwater enemies where melee builds struggle. Because it is locked behind Angler Cave access, it functions as a reward for completing structured progression rather than random exploration.

How the Tube improves movement and exploration

The Ruined Tube is not a weapon but a mobility-enhancing item. When equipped or used, it significantly increases your movement speed, particularly useful when traversing open ocean zones or escaping enemy clusters.

Movement speed is critical in Abyss, especially when navigating large underwater environments. Faster traversal means quicker quest completion, improved farming efficiency, and safer disengagement from dangerous enemies. The Tube therefore complements the Ruined Gun perfectly by combining offensive power with enhanced mobility.

Purchase details inside Angler Cave

Item	Type	Primary Benefit	Usage Role
Ruined Gun	Ranged Weapon	High burst damage	Combat efficiency
Tube	Mobility Item	Increased speed	Exploration and escape

Both items must be purchased once you enter Angler Cave. They are not automatically granted upon unlocking the cave. Make sure you have sufficient in-game currency before entering so you can acquire them immediately.

Why completing the Lost Captain quests is mandatory

The developers designed this progression intentionally. The Lost Captain’s questline serves as a skill check and preparation phase. By completing his missions, you gain experience, currency, and combat familiarity, ensuring you are ready for the equipment unlocked inside Angler Cave.

Skipping this step is not possible. There are no alternative keys, shortcuts, or glitches that legitimately bypass the Pirate Key requirement. If you want access to the Ruined Gun and Tube, you must complete the full quest chain.

Unlocking Angler Cave and its rewards

Unlocking Angler Cave in Abyss requires patience and full completion of the Lost Captain’s quests, but the reward is absolutely worth it. The Ruined Gun provides strong ranged damage, and the Tube dramatically improves movement speed, making both items powerful upgrades for progression and farming.

If you are aiming to strengthen your build and move more efficiently across the map, focus on finishing the Captain’s questline first. Once you secure the Pirate Key, Angler Cave opens the door to some of the most useful early-to-mid game gear available.