Mutagen Reagent Echo-4


	Mutagen Reagent Echo-4
	Misc.

A container holding potent mutagen.

Weight: 0.50

Cannot be sold.

Mutagen Reagent Echo-4 is one of the reagents for the Mutagen Puzzle in Deep Caverns.

This mutagen reagent can be found inside one of the buildings in Hollow Earth. A wall must be destroyed to get inside. If you head north from Caerus Residential, it's the third building to your right. Right after the big intersection with the broken-down tunneler. The canisters are on a desk inside.

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Misc. items	Package • Flux Controller • Old Watch • Putrefied Rathound Tissue • Trade Documents • Cybernetic Spawn • Grover's Head • Lost Cargo • Mysterious Disk • Blaine's Head • Armadillo Class Drill Rotor Circuit Board • Mining Explosive • Damaged Necklace • Tracker-Emitter Necklace • Rathound King's head • Strange Power Cell • Piece of Paper • Evidence of Murder • Red Cybernetic Eye • Impure Chromium Blade • Psi-amplifier • Head of the Beast • Energy Shield Emitter Shipment • ICPD • Paper Note • Hydraulic Generator Parts • Pipe • Gnawed Flux Controller • Cornell's Head • Bate's Love Letter • Remote Detonator • C4 Explosive Charge • Mutagen D5 • Rigged D5 Mutagen • Broken Thermostat • Jon's Special • Hercules Test Results • Abandoned Sniper Rifle (Foundry) • Unknown Insignia • Metal Figurine • Efreitor Mateo's Head • Portable Neural Pacifier • T-Ray Emitter • Protein Design Research Data • Note • Crumpled Note • A Photo Of You • Gold Ring (Water Treatment Plant) • Coretech PNT1 • Coretech PNT2 • Box of Cables (Abandoned Waterways Facility) • Super Steel Refining Data • Pistol and Submachine Gun Technical Manuals, by Hugo Thompson • Rifle and Shotgun Technical Manuals, by Eliphalet Wesson • Grenade Launcher Technical Manuals, by Yakov Piek • Machine Gun Technical Manuals, by Eugene Gatling • Old World Firearms, by Mikhail Browning • Underrail Express Ticket • Forged Underrail Express Ticket • High Voltage Power Cables • Orange Box • Handmade Remote Controller • High Voltage Penetrator Core

Misc. items (Deep Caverns)	Mycokardia • Corroded Drive Shaft • Faulty Hydraulic Control Valve • Hydraulic Control Valve • Hydraulic Fluid Canister • Hydro-Pneumatic Accumulator • TG-44HD Service Manual • Universal Mechanics Tool Set • HS-78 Hydraulic Pump Drive Shaft • HS-83 Hydraulic Pump Drive Shaft • HS-89 Hydraulic Pump Drive Shaft • HS-90 Hydraulic Pump Drive Shaft • AI Core (Blue) • AI Core (Green) • AI Core (Red) — Mutagen Reagents: Echo-1 • Echo-2 • Echo-3 • Echo-4 • Helicon-1 • Helicon-2 • Helicon-3 • Io-1 • Io-2 • Io-3 • Ovid-1 • Ovid-2 • Ovid-3 • Solis-1 • Solis-2 • Exitus-1 — The Cube • Faceless Medallion

Other plot items	Putrefying Bolt • Captured Cat • Captured Hopper • Captured Laser Cat • Kohlmeier's Lucky Knife • Utility Bot Remote Control • Optoelectric Nuclear Battery Blueprint • Captured Borer • Jackhammer • Bloody Mobile Computer • Port Zenith Security Pass - Bob Smith • Coretech Tracking Device • Biocorp Research Facility Pass • JKK Comm Device • Hercules • Tchortist Comm Device • XAL-001 Pistol • Captured Latcher • Bone Handle Knife • Psimorphic Biocide Grenade • Acidic Concoction

Expedition	Strange Medallion • A Discarded Piece Of Paper (Upper Underrail) • Old Ib's Family Photo (Old Ib's Homestead) • The Rig Comm Device • Note (The Rig) • Gun Lubricating Oil • Comm Device (Black Sea) • NavCom Device • Captured Small Crab • Fold-M 7 • Phil's Arm (West Storage Depot) • Microchip Implant Encoder (Nexus of Technology) • Phil's Microchip Implant (Lemurian Health Center) • Slimy Tablet Computer • Broken-off Spike • Rune Sketch • Bone Crank • The Shard • Ethereal Torch • Empty Tool Bracer (Abyssal Station Zero) • Todd's Arm (Abyssal Station Zero) • ACoNR (Abyssal Station Zero) • Naga Protector Diagnostic and Configuration Tool (Black Sea)

Heavy Duty	The Stunner (Inactive)

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