The monsters' parts

Vityok the Raven has information on the so-called "Klondike" of artifacts, and promises to tell you everything he knows if you deliver him a Red Controller Brain, 10 Deathclaw Horns, and 10 Librarian Hands.
== Walkthrough ==
Since the red brain is extremely rare, Vityok provides a location in Jupiter where another special controller with a red brain has been spotted: a [ train depot] in the east of the area.
=== Red brain in Jupiter ===
This part involves a large mutant massacre in tight spaces. To make the mission much less painful, you could prepare with:
* at least 5 anomalous grenades such as Electrica grenade;
* SKAT-15 exosuit with 10 scientific medkits, 1-2 antizombine, and ~30-40 bandages to auto-heal you without holstering the weapon;
* chemical burn resistance maximized to at least 60% in artifacts.
* bleeding recovery maximized with artifacts.
* possibly a flamethrower, as the mosquito zombies are vulnerable to fire;
* KS-23 "Drozd" against mosquito and plague zombies, since their attacks are just out of range.
Travel to Jupiter and head over to the train depot. It's marked on your PDA map.
Once you step closer inside, a whole host of enemies will spawn both behind and ahead of you. Here are things to note:
* The mosquito zombies are essentially unavoidable inside the narrow hallway.
* The controllers will eventually kill you with their psi-aura, so waiting in a blind corner isn't an option.
* Turning back without getting the red brain will be impossible due to a scripted sniper shot that will instantly kill you.
* Several Monolith troopers will spawn outside of the depot exit, and one inside the depot, so you'll have to kill them upon exiting.
* After several minutes, three more waves of enemies will spawn centered around you as it always happens in large mutant battles, so you can't stay in the depot for long.
* "Typhoon" Turret is a poor choice due to the large amount of insects and other similar considerations.
* You can use the Cloaking exoskeleton, quickly switch and kill the controller, and switch to it back, but that's actually the harder way.
There are 4 controllers inside the depot chamber, including the one with red brain; they spawn in a tight pack initially. If you rush inside, ignoring the damage from mosquito zombies and relying on your survivability (SKAT-15 auto-injection will help a lot), you can quickly throw 2-3 anomalous grenades and kill them instantly.
Beware of the Monolith trooper camping in the remote room inside the depot. Quickly cut the red brain from the mutated controller, and exit the depot. Kill the Monolithians outside the depot, and rush outside.
If you did everything in time, three more wave of mutants will spawn in the open space and not in depot, making your task significantly easier. As always in large battles, the spawn is centered around you, so you can go anywhere. The time between each wave is about several minutes. Don't leave the mutants on the location, as they will cause issues later.
Alternative strategy after killing the controllers is to hide in the small room inside the depot where the Monolithian spawns. Mutants will ignore you, except for some chimeras. You can wait in there until all mutants spawn and go outside, then leave the depot on your own terms.
==== Alternative stealth strategy ====
An alternative method to doing this portion of the quest stealthily involves a bit of setup. After gaining access to Jupiter, do not pick up the quest from Vityok. Instead, go to Jupiter and lay mines along the spawn spots of the controllers while the depot is unpopulated.
Accept the quest and return to Jupiter with a Cloaking exoskeleton. Lay your unnecessary weight in a rucksack some distance away, and enter the depot cloaked. All mosquito zombies and Monolith spawns will ignore you as long as you do not bump into them, and you're free to loot the red brain and leave the depot through the window. After this you can engage mutants or Monolith spawns safely from a distance.
=== Back to the Dump ===
Take the red brain, deathclaw horns, and librarian hands as requested, and return to Vityok in the Dump for the promised information. The Klondike is apparently located in a [ cave of the southern plateau in Zaton].
=== Klondike in Zaton ===
This part also involves a huge mutant massacre. To make it easier, you can prepare with:
* Cloaking exoskeleton and a battery for it. Obtainable in Controller's brains, or the safe inside the giant excavator in Pripyat Dungeons.
* Unique gloves, obtainable in Collector's stash Radar 3 or Flight recorder.
* UBGL and some 40mm grenades (to kill mosquitoes).
BUG WARNING: the artifacts at the Klondike spawn directly on the ground. Don't save the game in the vicinity (160m or less), otherwise they could fall through the ground. Do not use the explosives inside the cave for the same reason.
Head over to Zaton. The plateau leading to the Klondike cave can be climbed from its north edge, near the [ Circus anomaly]. The cave has two entrances, both are guarded by deathclaws, mosquito zombies, and biomasses. Kill them, approaching from outside both entrances (don't walk inside the cave yet!). The grandmother controller is inside the cave. Ignore any mutants that you can't kill without stepping deeper inside the cave.
Put your Unique gloves on, activate your Cloaking exoskeleton, and enter the cave. Once you pass far enough, an absolutely massive spawn will come from all parts of the cave. This includes innumerable Mosquito and Plague zombies as well as a Pyro-controller and a Burer.
Collect all artifacts in the Klondike cave. Gloves will protect you from the shock, and the mutants won't attack as long as they don't see you or bump into you. Avoid them as much as possible; you have plenty of room to slip out of the cave.
Exit the cave to the safety, and change your armor to your usual one. The mutants left in the cave are actually more or less isolated on the plateau, so you can leave them for later if you don't have the tools to take them out right now.
==== Gravi-gun strategy ====
If you have the Gravigun from the Dead City (either the [ hidden one] or the one spawning after Stash at the Agroprom), you can simply grab all artifacts from afar before triggering the spawn.
== Notes ==
* Akill's Chemical equilibrium quest is a good way to gather deathclaw horns if you don't have enough yet, just make sure to take a crowbar with you.
* All three artifacts Photographer is asking for in Escape from the Zone can be found in the Klondike.
*After an unknown trigger, the mutants in the Klondike will despawn entirely if left alone.
== Bugs ==
* Artifacts in the Klondike can fall through the ground if you save or load the game when they are online (within 160m), or if you use explosives inside the cave.
* Enemies in the Klondike spawn massive amounts of insects and rats when killed simultaneously. This can drop FPS considerably.