Abyssus Weapon Unlocks & Known Requirements
The reviewed dataset contains 7 fully documented weapon requirements and2 entries with limited verified detail. Use the known routes below, then expand a weapon to see its three primary and three secondary fire modes; missing conditions are never guessed.
Known unlock checkpoints with complete steps
ShotgunDefeat the Act 1, Stage 2 (Depth 2) miniboss.
Tesla GunDefeat the Act 2, Stage 2 (Depth 6) miniboss.
Disc ThrowerAfter the Depth 8 boss, destroy all four crystals in the next room; order does not matter.
Combat BowDefeat the Elite Catalyst in the Sanctuary in under 45 seconds, turn right on exit, then use the hidden-room altar.
Plasma LauncherReach the Royal Abyss within 45 minutes, then take the right-side chasm route before its entrance seals.
Weapon unlock requirements and coverage
| Weapon | How to unlock | Coverage |
|---|---|---|
| Disc Thrower Tier S | End of Act 2, Stage 4 (Depth 8): destroy the four crystals in the post-boss room to open the weapon door (order does not matter). | Post-boss puzzle Depth, room and crystal action are documented. |
| Tesla Gun Tier S | Act 2, Stage 2 (Depth 6): defeat the miniboss at the stage conclusion. | Encounter Stage and miniboss are documented. |
| Plasma Launcher Tier S | Reach the Royal Abyss within 45 minutes. From its starting building, turn right instead of left and jump → dash → jump across the dark chasm to the hidden-room altar; after 45 minutes the entrance is sealed. | Timed hidden room Region, 45-minute limit and movement route are documented. |
| Brine Revolver Tier S | Available early — a high-precision handgun that rewards accurate weakpoint hits. | Limited detail The reviewed dataset only says “available early.” |
| Combat Bow Tier A | Defeat the Elite Catalyst in the Sanctuary in under 45 seconds, then turn right on leaving the arena and follow the corridor to the hidden-room altar. | Timed challenge Enemy, location and time condition are documented. |
| Fish Deity Tier A | Unlocks in the Pregame Lobby after beating the First, Second and Third Herald (Act 4, Stage 1) across runs; then go behind the waterfall on the seaside path and collect it once the statues fill the pond. | Multi-run challenge Boss sequence and lobby collection route are documented. |
| Shotgun Tier A | Act 1, Stage 2 (Depth 2): defeat the miniboss at the end of the stage. | Encounter Stage and miniboss are documented. |
| Harpoon Gun Tier B | Added in the Update 1.2 "Brinefrost" patch — a naval weapon that fires piercing harpoons for massive single-shot damage. | Limited detail Patch provenance is documented, but no unlock challenge is present in the reviewed dataset. |
| Engine Rifle Tier C | The starter weapon — available from the beginning of every run. | Automatic Starter availability is documented. |
Primary and secondary fire modes
Disc Thrower — 3 primary + 3 secondary modes
Primary
- Automatic — Discs return after a hit.
- Fan Fire — Throws discs in a fan pattern.
- Dynamo — Discs bounce between enemies before returning.
Secondary
- Inferno Discs — Explosion around the discs.
- Electron Conductors — Arcs of electricity between discs.
- Search and Destroy — Discs home to the nearest enemy and detonate.
Tesla Gun — 3 primary + 3 secondary modes
Primary
- Electrical Beam — Continuous beam of electricity.
- Charge Beam — Overloads targets on Weakspot hits.
- Unstable Coil — Locks onto nearby enemies.
Secondary
- Spark Orb — Slow orb that zaps nearby enemies.
- Charge Orb — Explodes on impact and deals damage over time.
- Magnetic Storm — Charge a storm of electricity.
Plasma Launcher — 3 primary + 3 secondary modes
Primary
- Semi-automatic — Explosive plasma orbs.
- Flak Cannon — Fast plasma orbs.
- Seekers — Hold to lock targets, release a barrage of orbs.
Secondary
- Disintegration Beam — Piercing beam of plasma.
- Void Infusion — Creates a black hole that damages and slows.
- Adhesive Compound — Sticks to a target and explodes repeatedly.
Brine Revolver — 3 primary + 3 secondary modes
Primary
- Semi-automatic — Semi-automatic fire.
- Burst Fire — Fires a burst of bullets.
- Large Caliber — High damage with increased Weakspot damage.
Secondary
- Steady Scope — Reliable damage while scoped.
- Quick Scope — Bonus damage right after scoping.
- Charge Scope — More damage on full charge.
Combat Bow — 3 primary + 3 secondary modes
Primary
- Precision Shot — Charged arrow; bonus damage on the Sweetspot.
- Pierce — Piercing arrow; more damage per enemy hit.
- Return Arrow — Bonus damage/fire rate when recovering arrows or hitting Sweetspots.
Secondary
- Multi-Shot — Barrage of arrows.
- Smart Arrow — Bounces between enemies and surfaces (pairs with Chain Lightning).
- Exploding Arrow — Explodes on hit.
Fish Deity — 3 primary + 3 secondary modes
Primary
- Rapid Goo — Multiple arcing goo orbs.
- Fish Spit — Goo that makes enemies more vulnerable to stabs.
- Hazardous Goo — Goo dealing stacking damage over time.
Secondary
- Piercing Stab — Forward stab, piercing, high Weakspot damage.
- Wide Stab — Wide knock-back stab.
- Chainsaw — Repeated slashes, ramping on the same target.
Shotgun — 3 primary + 3 secondary modes
Primary
- Semi-automatic — Semi-automatic pump shotgun.
- Full-automatic — Fully automatic shotgun.
- Superheavy Slug — Precise slugs with increased Weakspot damage.
Secondary
- Buckshot — Powerful blast that knocks you backward.
- Unload — Fires all bullets fast, ramping damage per shot.
- Pressure Shot — Stuns and knocks enemies back.
Harpoon Gun — 3 primary + 3 secondary modes
Primary
- Piercing Harpoons — 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
- Barbed Harpoons — Spend Combo Points for burst DoT.
- Binding Harpoons — Pull enemies in; scales with Combo Points.
- Brine-Powered Harpoons — Large piercing harpoon scaling with Combo Points.
Engine Rifle — 3 primary + 3 secondary modes
Primary
- Automatic Fire — Fast automatic fire.
- Burst Fire — Semi-automatic bursts.
- Gatling Fire — Fire rate ramps up the longer you shoot.
Secondary
- Engine Rev — High fire rate but builds Heat.
- Split Shot — Multiple shots in an unpredictable spread; builds Heat.
- Concentrated Shot — Semi-auto that knocks enemies back; builds Heat.