Best Harpoon Gun Build in Abyssus
Best Harpoon Gun build at a glance
The Harpoon Gun is a deliberate combo weapon: primary fire builds combo points and secondary fire spends them. Flares fits the burst cadence, while reload speed keeps missed or interrupted cycles from becoming fatal.
- Primary fire
- Piercing Harpoons
- Secondary fire
- Brine-Powered Harpoons
- Aspect
- Flares (Fire)
- Weapon Forge
- Rapid Harpoons · Increased Combo · Plentiful Combo
- Ability
- Smiting Spear
Deals massive single-shot damage but suffers a long reload; a slow, heavy hitter that demands precise timing and positioning.
Best for: Precise single-shot burst & burn setups
Recommended Harpoon Gun build
Primary fire builds combo points and secondary fire spends them. Improve reload reliability, then add raw damage, critical support, and Flares around a deliberate cash-out window.
Primary and secondary fire
Piercing Harpoons (Primary) — Piercing, high knockback on Weakspots; builds Combo Points.
Brine-Powered Harpoons (Secondary) — Large piercing harpoon scaling with Combo Points.
Best Aspect and Blessings
Alternatives: Shadows (Night)
Exact weapon Forge picks
- Rapid Harpoons — Increases fire rate by 50%.
- Increased Combo — Increases maximum Combo Points by 1.
- Plentiful Combo — For each consumed Combo Point, refill 1 ammo.
Ability and Charms
Smiting Spear — Hurl a spear that strikes a target area — a top damage ability that pairs with Activate Gun Mode.
Editorial priorities
These are planning goals, not Ancient Forge item names.
Combo Point generationAmmo recoveryStable pierce lines
How to make the build work
- Improve reload reliability first so the combo loop survives a miss or forced dodge.
- Build points with primary fire and spend them only when the target or pierce line is stable.
- Add Flares and critical damage after the basic cycle is consistent, then use Giant Slayer for bosses.
Solo, co-op and boss adjustments
Solo route
Use cover and long lanes to finish the combo without being surrounded. Piercing shots are most valuable when you first align the smaller enemies behind a priority target.
Co-op role
Focus the elite your team has pinned down. Teammates can create the stable line that lets a charged secondary hit the intended target instead of a stray body.
Boss plan
Build the combo during safe movement, then cash it out on an exposed weakpoint. Smiting Spear can maintain damage when a reload or phase change interrupts the weapon cycle.
Common mistakes
- Spending combo points as soon as they appear
- Stacking burst damage before solving the long reload
- Forcing a pierce line while an attack telegraph demands movement
Depth 30 variant
Reload is the bottleneck. Stack reload-speed charms and mods so you keep firing through dense elite waves at Depth 30.
Harpoon Gun fire modes
Choose one Primary and one Secondary fire mode at the Workbench. “Recommended” marks this guide’s editorial selection.
Primary fire
- Piercing HarpoonsRecommended — Piercing, high knockback on Weakspots; builds Combo Points.
- Ricocheting Harpoons — Ricochet to a new target on Weakspots; builds Combo Points.
- Pinning Harpoons — Attach and deal damage over time; build Combo while attached.
Secondary fire
- Barbed Harpoons — Spend Combo Points for burst DoT.
- Binding Harpoons — Pull enemies in; scales with Combo Points.
- Brine-Powered HarpoonsRecommended — Large piercing harpoon scaling with Combo Points.
Harpoon Gun Ancient Forge upgrades
These are weapon-specific Ancient Forge upgrades, not generic stat priorities. “Recommended” is an editorial pick for this route.
- Charged Harpoons — Primary and Secondary can be charged, causing up to 6 harpoons to be fired in quick succession.
- Rapid HarpoonsRecommended — Increases fire rate by 50%.
- Splitting Harpoons — Weakspots create an additional harpoon that seeks out a new target.
- Blessed Harpoons — Primary and Secondary deals 10% more damage for every Minor and Major Blessing.
- Charmed Harpoons — Gain buffs based on your Charms.\n\nCommon: +20% fire rate and +20% damage.\nRare: +30% reload speed and +20% Blessing trigger chance.\nLegendary: Shoot an extra harpoon.
- Increased ComboRecommended — Increases maximum Combo Points by 1.
- Precise Combo — Marks a random Combo Point. Spending that amount of Combo Points increases the effect as if it consumed the maximum amount +1.
- Plentiful ComboRecommended — For each consumed Combo Point, refill 1 ammo.
How to unlock the Harpoon Gun
Added in the Update 1.2 "Brinefrost" patch — a naval weapon that fires piercing harpoons for massive single-shot damage.
Patch and source notes
Official baseline: Abyssus 1.3.62817, released. This page was impact-reviewed on. Read the official hotfix feed.
Reviewed against the hotfix notes; no documented balance-value change alters this recommendation.
Fire mode, ability and weapon Forge names are reference facts; the selected combination is an editorial recommendation.Names and taxonomy reviewed; legacy effect values are not all independently re-tested. Check the in-game Logbook for a live numeric value, browse the Forge catalogue, and see our methodology for the review policy.
Related weapon builds
Choose the alternative that best addresses this build’s trade-off.