Corrosive Sludge Pump

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Unlocked through an assignment

Requires Driller 18

Purchased for:

8200	Credits
50	Jadiz
110	Magnite
40	Enor Pearl

Initial Stats

Damage	16
Charged Area Damage	48
Magazine Size	20
Max Ammo	120
Rate of Fire (per second)	4
Reload Time	3s
Charged Shot Ammo Use	5
Charged Fragment Damage	4
Charged Fragment Count	8
Charge Speed	1.0s
Effects Duration	4
Puddle Lifespan	12

“	The Corrosive Sludge Pump is what happens when the maintenance staff are left with too much time on their hands. A complicated network of piping, distillation bottles, and safety valves results in a very capable device indeed - lobbing globs of toxic waste at those you disapprove of has never been so fun!
	— Item Description

The Corrosive Sludge Pump is an unlockable primary weapon for the Driller. It is a large sludge dispenser that fires corrosive sludge, capable of melting enemies. It consists of a number of pipes and valves wrapped around a fuel tank with a nozzle.

The Sludge Pump has two firing modes; Tapping the fire button will fire a single fragment of sludge whereas holding the fire button and releasing will fire a sludge bomb that causes several fragments to fly out upon impact.

When a corrosive projectile impacts an enemy, that enemy becomes visibly coated with sludge and takes damage over time (DoT). When the projectile impacts a surface, it creates a corrosive puddle that causes DoT to any enemy walking over it, along with slowing them down.

Modifications[]

There are five tiers of modifications and each tier has two to three upgrades. Only one modification can be equipped per tier.

Corrosive Sludge Pump Modifications

Mod

Effect

In Game Description

Price

Tier 1

High Capacity Tanks

+20 Tank Size

"The good thing about clips, magazines, ammo drums, fuel tanks ...you can always get bigger variants."

1200	Credits
25	Bismor

Better Air Pressurizer

+40% Projectile Velocity

"The air pressurizer is improved, making the projectiles travel faster and further."

1200	Credits
25	Croppa

Air Sensitive Compound

+ Bigger Puddles

(x1.25 Puddle Size)

"When the goo is exposed to air it expands, making puddles cover a larger area on impact."

1200	Credits
25	Umanite

Tier 2

Dyse Nozzle

+24 Charged Splash Damage

"With the Dyse Nozzle your charged shot is launched with more force, making it damaging on impact."

2000	Credits
15	Umanite
24	Bismor

Atomizer Nozzle

+4 Charged Fragment Count

"With the Atomizer Nozzle your charged shot will leave behind more fragments on impact."

2000	Credits
24	Jadiz
15	Bismor

Potent Goo Mix

+8 Normal Shot Damage

"Normal shots do more damage on impact."

2800	Credits
50	Croppa
35	Umanite

Tier 3

Supersaturation

+2 Effects Duration, +6 Puddle Lifespan

"The goo goes through a process of supersaturation after impact, making the effects and puddles last longer."

2800	Credits
50	Magnite
35	Umanite

More Goo Canisters

+40 Max Ammo

"You had to give up some sandwich-storage, but your total ammo capacity is increased!"

2800	Credits
35	Enor Pearl
50	Bismor

Tier 4

Spillback Extension

-1 Charge Cost

"With the Spillback Extension added to the nozzle you spend less goo when charging."

4800	Credits
50	Magnite
72	Umanite
48	Bismor

Improved Spooling Mechanism

-60% Charge Time

"The spooling mechanism has been improved and can get you to a full charge faster!"

4800	Credits
48	Croppa
50	Jadiz
72	Umanite

Tier 5

Protein Disruption Mix

+ Increased Slowdown Effect

(x0.75 Movement Speed for Direct DoT Effect, x0.5 Movement Speed for Puddles)

"Disrupting the protein molecules in the goo mix has made it more rigid and harder for creatures to move through."

5600	Credits
140	Magnite
64	Umanite
70	Bismor

Fluoroantimonic Acid

+ Increased Corrosive Damage per sec.

(+2 Effect Damage (per tick), +4 Puddle DPS)

"A new and improved goo recipe with very aggressive properties makes every second in it more hellish!"

5600	Credits
70	Croppa
64	Umanite
140	Enor Pearl

Overclocks[]

Overclock calculations happen after modifiers.

Corrosive Sludge Pump [Expand/Collapse]

Overclock

Effect

In Game Description

Price

Hydrogen Ion Additive

+0.5 Direct Hit Corrosive Damage

x0.85 Direct Hit Corrosive Slowdown

"Experimental additive that activates on impact gives a small improvement to the corrosive DoT and slowdown effect of direct hits."

8800	Credits
70	Umanite
100	Enor Pearl
135	Bismor

AG Mixture

+30% Projectile Velocity
x0.25 Gravity on Projectiles

"Anti-gravity pellets suspended in the sludge let the projectiles fly further and faster."

7800	Credits
60	Croppa
105	Jadiz
140	Umanite

Volatile Impact Mixture

2x Regular Shot Area Damage
2x Charged Shot Area Damage
x0.5 Corrosive DoT Duration
x0.75 Sludge Puddle Duration

"Special mixture increases immediate projectile damage at the cost of the long term corrosive and slowdown effects and puddle lifetime as the volatile compound evaporates much faster."

8500	Credits
75	Jadiz
100	Magnite
120	Bismor

Disperser Compound

+6 Charged Shot Fragments
+4 Fragment Area Damage
-24 Charged Shot Area Damage

"Charged shots break apart into more fragments on impact and each fragment is more potent, however the initial damage of the charged projectile impact is reduced."

8800	Credits
135	Jadiz
100	Magnite
60	Umanite

Goo Bomber Special

Charged projectile drops fragments as it flies
+4 Fragment Area Damage
x1.5 Charged Shot Fragments
x1.33 Sludge Puddle Duration
Charged projectile does not break into fragments on impact

"The addition of finely tuned timed separation compounds cause the charged shots to leave a trail of sludge as they fly through the air. However the projectile depletes its mass as it flies, dealing less impact damage as fragments separate and completely expiring once all fragments are dropped."

7450	Credits
140	Jadiz
65	Umanite
90	Enor Pearl

Sludge Blast

+Sludge Blast
+100% Charged Shot Velocity
x0.5 Charged Shot Area Damage
-40 Max Ammo
+0.6 Reload Time

"The charged shot cohesion is disrupeted on firing, instantly shooting out fragments in a shotgun-like blast. While spectacular the modifications result in reduced magazine size and ammo capacity by an extented reload process."

8200	Credits
100	Jadiz
120	Magnite
60	Umanite

Stats Breakdown[]

Understanding the Weapon[]

Damage is how much damage is dealt upon direct impact of an uncharged shot.
Charged Area Damage is how much damage is dealt within the damage radius around the impact of a charged shot.
Charged Fragment Damage is how much damage is dealt by each fragment spawned by a charged shot.
Charged Fragment Count is the amount of fragments spawned by a charged shot.
Effects Duration is the amount of time in seconds that corrosion affects an enemy when it is directly impacted by a corrosive projectile
Puddle Lifespan is the amount of time in seconds that a corrosive puddle persists after a corrosive projectile lands on surface

Normal and Charged Shot Breakdown[]

Normal Shots & Charged Fragments

Damage Type: 50% Kinetic / 50% Corrosive
Damage Radius: 1m
Max Damage Radius: 0.5m
Minimum Damage: 25%
Hitbox Radius: 0.25m (0.20m for Fragments)

Charged Shots

Damage Type: 50% Kinetic / 50% Corrosive
Damage Radius: 2.5m
Max Damage Radius: 1m
Minimum Damage: 25%
Hitbox Radius: 0.45m

Corrosion Mechanics[]

Enemies hit directly or caught within the splash radius of the sludge projectiles have a 100% chance to be applied with Corrosion. (Note: Enemies walking through a corrosive puddle will not apply/refresh this effect.)

Damage (per tick): 8
Damage Type: 100% Corrosive
Tick interval: 0.2-0.25s
Duration: 4 seconds
Slowdown: 35% (x0.65 Movement Speed)

Puddle Properties[]

Enemies take damage for however long they remain on a corrosive puddle. (Note: This DoT stacks with the aforementioned Corrosion DoT effect.)

Damage (per tick): 4
Damage Type: 100% Corrosive
Tick interval: 0.2-0.3s
Duration: 12 seconds
Slowdown: 45% (x0.55 Movement Speed)
Hydrogen Ion Additive Overclock does not affect the puddle damage or corrosive puddle DoT or Slowdown

Puddle Diameter is affected by whether the puddle was created by a normal shot or a charged shot. Charged fragments create the same size puddles as normal shots
- Normal diameter: 1.2 meters
- Charged diameter: 2.4 meters
Puddles ignite after accumulating 20 Heat from any source. While burning the puddles deal additional Fire + Heat damage to enemies that walk through them
- Additional Damage (per tick): 12 Fire
- Heat (per tick): 12 Heat
- Tick Interval: 0.5-1.0s

In addition to the applying a damage over time that deals both Fire and Heat damage the Burning Goo Puddles are considered to be On Fire with a 1.7m Area Heat Radius. Along with this the Burning Goo Puddles act as an Environmental Heat Source with an Intensity value of 1. To calculate the total heat being applied to any given bug simply use this formula:

Heat per Second = [ Current Intensity Temperature per Second ] + 5 * [ Nearby Puddles ]

Most of the time the amount of additional Heat damage will simply be 2 + 5 * [ Nearby Puddles ]. The Heat Intensity can be raised or lowered in the presence of other Environmental Heat or Cooling effects such as the Blizzards that may occur in the Glacial Strata.

Slowdown Mechanics[]

The two modifications, Protein Disruption Mix and Hydrogen Ion Additive, that affect the Sludge Pump's two sources of slowdown do not add to or replace the slowdown stats. Instead they act as separate multipliers to enemy movement speed.

Movement Speed Multiplier Values
Modifications	Corrosion Status Effect	Corrosive Puddle	Corrosion + Puddle
Base	x0.65	x0.55	x0.3575
Protein Disruption Mix	x0.4875	x0.275	x0.1341
Hydrogen Ion Additive	x0.5525	x0.55	x0.3039
PDM + HIA	x0.4144	x0.275	x0.1140

Unique Modifications[]

Unique Modifications
Fluroantimonic Acid	Fluoroantimonic Acid increases the damage of both the Corrosion status effect and the Corrosive Puddles. The extra damage added to the puddles comes in the form of a second damage over time effect with its own tick rate and damage.	Corrosion Bonus: +2 Corrosive damage per tick. Second Puddle DoT: Damage (per tick): 1 Corrosive damage Tick Rate: 0.2-0.3s

Unique Overclocks[]

Unique Overclocks
Goo Bomber Special	Goo Bomber Special is an unstable overclock that causes Charged Shots to drop their Fragments straight down while flying, instead of upon impact. Every Fragment dropped reduces the damage of the main projectile. After every Fragment has been dropped / collide with an entity or the terrain, the main projectile is instantly destroyed.
Sludge Blast	Sludge Blast is an overclock that changes the Charged Shot into a shotgun-like blast of the Fragments instead of a larger projectile. Fragments use the Charged Shot's damage instead. Charge Shots are also launched at a 3° angle instead of the normal 9° angle.

Mastery[]

Each modification that is purchased advances a mastery bar by one unit.

Mastery unlocks:

Three modifications – First Stripe Weapon Paintjob
Seven modifications – Deepcore Weapon Paintjob
All modifications – The Company Special Weapon Paintjob

Skins[]

Gallery[]

Trivia[]

The Corrosive Sludge Pump's weapon prototype used the Platform Gun model and its goo blobs more closely resembled the goo generated by Goo Sacks.

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