How to Unlock Morveth's Treasure Gun in Abyss (Roblox)

Morveth's Treasure Gun is a late mid-game weapon in Abyss on Roblox, locked behind a short quest chain and a hidden cave interaction.

Quick answer: Complete all four Morveth quests to earn four ruby jades, equip them, place each jade into the four stones inside Morveth's cave, then purchase Morveth's Treasure Gun for 82,500 in-game currency when the weapon unlocks.

State: Morveth's Treasure Gun requirements and stats

Morveth's Treasure Gun is purchased after unlocking it in Morveth's cave. The weapon costs 82.5k in-game currency once available. It is positioned as a strong option when moving from the beginning of the end game into the late mid game.

The weapon has a 2 second cooldown, deals 240 damage, and provides 0.9 control when trying to catch a fish. Unlocking and buying it also grants an achievement tied to completing Morveth's full quest chain.

Morveth's Treasure Gun trigger: how to unlock the weapon

Step 1: Travel to the starting dome area and look along the edge of the dome in the ocean until you spot a submarine. This submarine is the visual reference used to orient yourself before heading to Morveth's cave.

Step 2: From the submarine, follow the same path shown by the reference route toward a nearby cave entrance. Continue along this path underwater until a prompt appears naming the location as "Morveth's Cave" and mentioning a strange energy.

The player arrives at a cave entrance. An on-screen notification reads: "Morveth's Cave. Strange energy weaves between… — The player arrives at a cave entrance | Image credit: *YouTube/@IcenezzNL*

Step 3: Enter Morveth's cave. Inside, locate Morveth, a shadowy NPC positioned on one side of the cave interior. His position can be either on your left or right depending on which side you enter from.

The player interacts with Morveth. A dialogue menu appears with the following options: 1. [Quest] I've completed your… — The player interacts with Morveth | Image credit: *YouTube/@IcenezzNL*

Step 4: Interact with Morveth to access his dialogue menu. Use the quest-related dialogue options, such as the one confirming that you have completed his tasks, to progress through his quest line.

Step 5: Complete all four specific quests tied to Morveth. Each completed quest awards a ruby jade. By the end of the chain you should hold four ruby jades in total, one for each quest.

The narrator states that four specific quests related to Morveth must be completed. Upon selecting the first option,… — Image credit: *YouTube/@IcenezzNL*

Step 6: Return to the interior of Morveth's cave where the stones are located near the weapon pedestal. Equip the ruby jades in your inventory before interacting; they are not taken automatically.

a view of a character in a cave with glowing red stones. Text overlays appear reading "Morveth's Treasure Gun" and… — Image credit: *YouTube/@IcenezzNL*

Step 7: Insert each equipped ruby jade into one of the four stones. When all four stones are filled, an animation plays and the previously blacked-out Morveth's Treasure Gun unlocks for purchase.

Step 8: After the unlock animation, interact with the weapon to buy Morveth's Treasure Gun for 82.5k. Once purchased, it becomes available as a usable weapon and the corresponding achievement for finishing Morveth's quest chain is awarded.

Verification: how to know Morveth's Treasure Gun is unlocked

Morveth's Treasure Gun is correctly unlocked when the weapon icon in the cave is no longer blacked out and can be interacted with for purchase at the cost of 82.5k. The insertion animation for all four ruby jades must have finished beforehand. After buying it, the weapon appears in your usable gear and the achievement for completing Morveth's quest chain is granted, confirming that the trigger conditions were met.