Scan the deep-pond resource at a Ranger Station to unlock the Harpoon Gun, harpoon bolts, and a new spear recipe; the Crystal Trident belongs to the same Into the Abyss pond weapon progression.
Grounded 2 added proper pond combat with Into the Abyss, and the Harpoon Gun is the first recipe to unlock before spending long stretches in the deeper water. The Crystal Trident sits in the same underwater weapon lane, and this scan route is the progression path that opens the Harpoon Gun, bolts, and the new spear recipe.
Harpoon Gun and Crystal Trident unlock summary
| Weapon | How to unlock |
|---|---|
| Harpoon Gun | Collect the deep underwater resource from the pond, then scan it at a Ranger Station analyzer to unlock the recipe and harpoon bolts. |
| Crystal Trident | Is in the Into the Abyss weapon list and belongs to pond weapon progression; follow the scan route for the new spear recipe tied to this underwater path. |
The unlock path starts with one deep underwater resource. Bring that resource back to an analyzer and the game adds the ranged pond weapon, its ammo, and a spear recipe tied to this underwater progression path.
Gear to bring before entering the deep pond
Bring a diving setup before you go after this resource. The route goes far below the surface, so you need underwater access, enough oxygen to search calmly, and gear that lets you stay down long enough to grab the item and return without panic.
The run shown uses a Koi Scale Helmet as the important breathing piece. If your build uses equivalent diving gear, the goal is the same: extend your time underwater and make the deep swim safer.
Land combat tools will not carry you through the pond. Into the Abyss makes underwater combat its own lane, with spears and the Harpoon Gun being the important options once you start pushing deeper.
How to find the underwater item and scan it in Grounded 2
This route gets you the Harpoon Gun recipe, harpoon bolts, and the new spear recipe by collecting one deep-pond item and analyzing it.
STEP 1/8
Go to the pond location
Head to the water location shown for the resource and enter from the nearby edge.
STEP 2/8
Line up with the underwater spot
Line up at the pond for the Motor dive.
STEP 3/8
Swim down from the visible entry point
Enter the water and descend from that spot instead of searching along the surface.
STEP 4/8
Keep going into the deep water
Swim much deeper, since the resource sits around the lower pond depth rather than near the top.
STEP 5/8
Look for the underwater resource
Watch for the common deep-water item ahead of you, then search the surrounding area if one is not immediately in front of you.
STEP 6/8
Watch your oxygen while collecting it
Grab the item, but leave enough oxygen to get back out safely.
STEP 7/8
Return to a Ranger Station
Go to any outpost with an analyzer after you have the resource.
STEP 8/8
Scan the item
Analyze the resource to unlock the new spear recipe, Harpoon Gun, and harpoon bolts.
Video help
Crystal Trident progress after the scan
Crystal Trident is listed among the Into the Abyss pond weapons alongside the Harpoon Gun, Koi Scale gear, and other underwater additions. The scan route above is the route to follow because it unlocks the new spear recipe tied to this deep-pond progression.
Build this route around the analyzer unlock, not a separate Crystal Trident shopping list. This path gives you the deep-pond resource scan, the Harpoon Gun, harpoon bolts, and the new spear recipe; it does not use a separate ingredient list, stat spread, or standalone pickup chain for Crystal Trident.
Scan the deep-pond resource before farming extras, because the Harpoon Gun and bolts will not appear in your crafting options until the analyzer unlock happens.
Pond progression gear to collect nearby
| Item | Use |
|---|---|
| Diving gear | Extends underwater time and helps you reach deeper pond routes. |
| Underwater flares | Light up dark pond areas while searching for resources. |
| Croakwurst Bomb | Works as an underwater mine with a proximity detonation. |
| Omni-Clipper | Helps with efficient deep-pond resource farming. |
While you are working toward the Harpoon Gun and Crystal Trident path, build out the rest of your pond kit. Focus on tools that improve underwater survival, visibility, farming, and combat so you can stay in the depths longer.
Recipe checks if nothing appears
Key If the Harpoon Gun does not show up, make sure you actually scanned the deep underwater resource at a Ranger Station analyzer. Picking up the item alone is not the unlock; the analyzer scan is the part that adds the recipes.
If the swim keeps failing, solve oxygen first. Use your Koi Scale Helmet or equivalent diving setup, avoid over-searching at the deepest point, and turn back before the oxygen warning becomes the run-ending problem.
The pond weapon rules are different from land combat. Newer land-only weapons will not function underwater, and the Harpoon Gun will not appear before the required scan.
Related Grounded 2 guides
Frequently Asked Questions
Can you use the Harpoon Gun outside the pond?
The Harpoon Gun is built around ranged underwater combat. Its main value is fighting in the pond, where standard land weapons are limited and underwater enemies are easier to handle at range.
Why is the Harpoon Gun important for Into the Abyss?
Into the Abyss rebuilt swimming and pond combat, including underwater lock-on, burst movement, and ranged pond fighting. The Harpoon Gun gives you a safer way to weaken threats before closing in with a spear.
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