To get the Titanic Scalder Harpoon Gun in Fisch, go to the Ancient Archives behind the Ancient Isles waterfall and craft it at the harpoon table with 1 Heatproof Metal, 1 Thermal Harpoon, and 25 Salvage Scrap.
The Titanic Scalder is a crafted harpoon gun, so checking regular merchants will not get you anywhere. Your main job is reaching the right room inside Ancient Archives, using the separate harpoon crafting table, and having every material in your bag when you open the menu.
Titanic Scalder requirements in Fisch
| Detail | Value |
|---|---|
| Location | Ancient Archives on Ancient Isles |
| Station | Separate harpoon table in the main crafting cavern |
| Recipe | 1 Heatproof Metal, 1 Thermal Harpoon, 25 Salvage Scrap |
| Purchase status | Crafted only, not bought from a merchant |
| Material count | 27 total materials |
KEY!
Before you make the trip, treat the Titanic Scalder as a material craft, not a coin purchase. The recipe only becomes useful once the required materials are already with you, since the harpoon table is the station that turns them into the weapon.
How to craft the Titanic Scalder Harpoon Gun in Fisch
Follow the Ancient Archives route, then use the harpoon table with the full recipe in your bag.
STEP 1/7
Travel to Ancient Isles

Go to Ancient Isles, the island that leads to the Ancient Archives.
STEP 2/7
Find the waterfall gap

Look behind the cliffside waterfall for the hidden opening that leads inside.
STEP 3/7
Descend by rope

Go through the gap and use the rope to climb down into Ancient Archives.
STEP 4/7
Follow the cave

Move through the cave toward the main crafting section, crossing the broken bridge area by jumping along the narrow edge.
STEP 5/7
Use the harpoon table

Stand at the separate harpoon crafting table, not the fishing rod stations, and open its menu.
STEP 6/7
Bring the Titanic Scalder recipe

Make sure your bag has 1 Heatproof Metal, 1 Thermal Harpoon, and 25 Salvage Scrap.
STEP 7/7
Craft Titanic Scalder

With all three requirements ready at the proper table, craft the Titanic Scalder Harpoon Gun.
Use the harpoon table near the back of the main crafting cavern; the rod stations can make the Titanic Scalder recipe look missing even when you are in the right area.
Video help
Why the Titanic Scalder recipe is missing
The most common mistake is looking for a merchant. Some harpoon guns are bought with C$, but Titanic Scalder is part of the newer crafted harpoon group, so the shop route sends you to the wrong place entirely.
The second issue is the station itself. Ancient Archives has rod crafting nearby, but Titanic Scalder uses the harpoon table, which sits separately in the main crafting cavern. If you open a rod list, the harpoon recipe will not appear there.

Players also miss the entrance because the route starts behind the Ancient Isles waterfall. If you have reached the island but never slipped through the hidden gap and down the rope, you are still outside the area that contains the correct station.
Titanic Scalder stats in Fisch
| Stat | Value |
|---|---|
| Power | 9 |
| Velocity | 32 |
| Resilience | 40 |
| Accuracy | 20 |
The Titanic Scalder’s numbers make it a high-resilience harpoon gun with strong velocity. As new The Deep gear, its values can still change with balance updates, but the current stat line is clear enough for deciding whether the craft is worth chasing.
That spread points toward a harpoon gun built more around staying reliable during the pull than landing the highest raw power number. Since direct performance testing is still limited, use the stats as a comparison point rather than the only reason to spend your materials.
Harpoon guns to chase after Titanic Scalder
Once you have Titanic Scalder, the closest next target is Relic Piercer, since it is also tied to Ancient Archives harpoon crafting. If you want a different route instead, Trident Striker sends you toward Desolate Deep with its own unlock path.
For broader planning, compare Titanic Scalder against the full harpoon gun list by checking each weapon’s location, cost or recipe, and stat spread. That helps you decide whether to spend more time in Ancient Archives or move on to another harpoon goal.
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