Guide to xenobiology

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Xenobiology is the breeding and harvesting of slimes and their extracts for scientific purposes. This all takes place in the xenobiology lab where you spawn, and is arguably more dangerous than making bombs if you don't know what you are doing. Which is a good reason to read this!

Home on the Range

Xenobiology on Boxstation

As a Xenobiologist, you’re not going to get out that much until some late game slimes. And until you get those, you won't be bothered much either, at least in theory.

So let's get familiar with your new home. As an example, this is what the xenobio lab looks like on Boxstation.

The workplace in the center includes a couple of closets with bio-hazard suits, a monkey recycling machine, a slime processor, and an All-In-One Grinder with several sheets of plasma. Also included is a smartfridge modified to hold slime extracts within easy arm reach from the slime processor. There is also a wrench, which can unanchor all the machinery, so you can reorganize your workspace. To the western end is a disposal unit that leads to space and right of this is the bread and butter of your job: The Slime Console, which will be covered later.

To the south is the slime containment area with six pens. Two (or three on some maps) of these pens start with a baby grey slime.

To the north is a special containment pen that's larger and more secure than the rest. This is ideal for containing and experimenting on other alien lifeforms should the station manage to capture/produce one. Usually though, it's just for storing extra slimes.

Using the slime console

The Slime Console is a semi-new addition to the Xenobiology scene that makes your job roughly a hundred million times easier. With it you can move slimes, kill them, feed them, and process dead monkeys with mere clicks of a button! It's strongly advised to grab the wrench next to the shield projectors and move the fridge and slime processor within close range of the console you're using to cut out a lot of unnecessary movement.

Safety Advice

Before you start breeding slimes, you may want a fire extinguisher in your backpack. You'll rarely meet a ravenous, hungry slime if you're using the console, but it still happens and having an extinguisher could very well be the difference between a dead slime and a dead you.

If you aren't, then this goes doubly so as you'll be near a lot of slimes, usually before you cull their numbers, and while they're normally docile towards you whom are effectively their God, they occasionally grow resentful for their species' exploitation and try to kill you for no particular reason. In that case, kill the blasphemers with a clear conscience, DEUS VULT!

Now that monkeys have regained some sentience, they'll attack you if you try to manhandle them. It's strongly advised to just use the console to avoid any contact, but otherwise keep an extinguisher to bash riled up monkeys, or have a buddy to help you out if you get assaulted.

Don't be the guy who tries to harmbaton a slime outbreak.

Breeding slimes

Feeding

Insert the monkey cubes from the boxes into the console. The console can now teleport monkeys directly inside the slime pens! Slimes need one monkey to become an adult and another to split.

  • You can send both monkeys at once into a baby slime's pen, so you don't have to think about it until they split.
  • Do NOT enter the pen and bash the monkey, the only thing that will happen is the slime will get less food.

Once they're fed enough, after a while the adult slime will split into 4 baby slimes.

Culling

Time to kill your darlings.

Decide which baby slimes you don't want to keep and proceed to warp them up with the console. It can hold up to 5 slimes at a time. Teleport them onto the kill pen; it's the one with the blue floor, connected to a freezer. The sharp cold will kill the slimes quickly: when they stop moving, they're dead and you can pick them up for the next step.

Grinding

Collect the dead slimes from the freezer room, and drop them within one tile of the slime grinder. It will automatically suck in the slimes; when it's done, activate it to grind them. It will, after a while, drop a slime core of the respective color for each slime grinded.

  • Upgrading the grinder will make it go faster and give more cores per slime.
  • A Bio Bag from any biohazard locker can mass-collect slime cores and easily drop them into the fridge for easy access.

Resource Management

Monkey Cubes

Monkey cubes are the basic material that you'll need to do xenobiology; without those all you can do is sacrifice intruders ask for another department's monkeys. How do you gain more monkey cubes?

  • You start with two monkey cube boxes containing 5 each, for a total of 10.
  • The first method you'll use to get more cubes is the Grey Slime blood reaction. It will spawn three monkey cubes per extract.
    • Grab a dead monkey from a pen, after a slime has finished eating it.
    • Draw blood from the dead monkey with a syringe. Inject it into a beaker.
    • Use a dropper set to 1u to inject the blood into the grey extracts. More than that is a waste.
  • After the first few splits, you should aim to create and use either a reproductive grey or an industrial grey crossbreed.
  • Upgrades are important, make sure to get them early.
    • With an unupgraded slime grinder a baby grey slime will give 3 cubes.
    • Upgrading a slime grinder to T3 parts, which can be achieved after researching high-efficiency parts, will raise that amount to 9.
  • Bio bags can store monkey cubes and load the console with them in two simple clicks, so don't waste time putting them in one by one.
  • Recycling a monkey with the console yields 0.2 monkey cubes without upgrades.
    • If you upgrade the Monkey Recycler, you will get up to 0.8 cubes per monkey with both the recycler and the consoles.

Plasma

Plasma is the most common chemical required to react with slime extracts. You start with 2-4 bars depending on the map, which you can grind for 20 liquid form plasma each (usually simply called "plasma").

  • You require a dropper or syringe to inject chems into extracts. A dropper can be activated in hand to toggle it to 1u.
  • Most reactions only require 1u of plasma for full effect.
  • You can produce new plasma yourself with either metal or dark purple slimes. These will create metal respectively plasteel and plasma bars.
    • Plasteel bars give 20 iron and 20 plasma each when ground.
    • Pure plasma gives 20 plasma per bar.
    • Making these reactions requires some plasma to start with, so be careful not to run out before making more bars.
  • In case you run out, you can either get more from mining, the Testing Lab or the Experimental Lab if the extra plasma bar is still there, or you can ask Chemistry or Engineering to give you theirs.

Friendship and Slimes

If you've been following the guide and diligently breeding and culling the slimes, you may have noticed that while the slimes very quickly attack and eat the monkeys you offer them, they have little to no interest in eating you. This is because you've become their "friend", a status that can be earned by simply being the one sending them monkeys. To check if slimes are friendly, say "Hello slimes"; all the slimes that consider you their friend will say hello.

Commanding Slimes

There are some commands you can issue as a slime's friend. Keep in mind however, these commands are exceedingly finicky, and are rarely used for a reason. Slimes will not attack other slimes or friends.
Each command requires you to include the word "slimes" somewhere in the sentence. List of commands:

  • Hello/hi slimes: Makes the slimes greet you if you are their friend.
  • Follow slimes: Asks the slimes follow you.
  • Stay slimes: Asks the slimes to stay where they are for a while.
  • Stop slimes: Asks the slimes stop chasing if chasing a target, stop feeding if feeding, or stop following you if they're following. If they don't like you enough, asking them to stop feeding or chasing can upset them and make them like you less. If this happens they'll say "Grrr...".
  • Attack (exact target name) slimes: Asks the slimes to chase the target to feed on it. They'll be faster while chasing. Asking them to attack a friend of theirs can upset them.


Defending against slimes

So either by you not feeding the slime enough, the slime being a dick, or reasons, a slime has tried to kill you. If the slime is a baby, this is annoying. If the slime is an adult, you may die if you don't know what you're doing.

Slimes have two attacks: A glomp that does brute damage with adults dealing more and a chance to stun, and the far more dangerous 'feeding' attack which deals cellular damage and empowers the slime, a rare and very difficult to heal type of damage. If a slime starts feeding on you, wrestle it off with disarm intent and spray it down with an extinguisher (You DID get an extinguisher, right?) until it dies. After that, hobble off to medbay for healing.

While this is generally more a tip for you when NOT playing Xenobiologist, in the event of a very rare slime outbreak, perhaps of sentient slimes, get an extinguisher and hide. A horde of angry slimes can multiply fast, and while slimes are normally unintelligent and docile, outbreaks of them are nearly always done on purpose by someone wanting to destroy the station, and are thus paired with usage of red extracts enraging slimes and/or light pink or black extracts making very deadly intelligent slimes. Pray that the AI is able to stop them, and that the xenobiologist who released the slimes doesn't follow up with something worse.

Slime Mutations

There are several a fuckload of different flavors of slime. You begin with two or three grey slimes but you can breed them to catch all the pokèmon! slimes! Each kind of slime has its own powers from its extract.

Every time a slime splits by being fed enough, it has a chance to mutate based on its individual mutation chance, a stat discovered by taking a slime scanner from the fridge and using it on the slime. It usually varies between 25% and 45%, but sometimes you will encounter slimes whose mutation chance is more like 15% to 20%. Choose carefully which slimes to keep! If you're breeding greys for monkeys, you'll want a lower chance of mutations, and if you want to get adamantines, you might want to increase it!

NOTE: You can increase a slime's chance of mutation by injecting it with slime mutation potions from red slimes and decrease it with slime stability potions from blue slimes.

This flowchart shows the results of each slime's mutations when splitting, with options labeled "2x" having twice the chance of occurring.

Slime Extract and Luminescent Effects

Most reactions only require one unit of reagent for full effect. Dropper is your friend. There are exceptions though. Some reactions will create a liquid reagent inside the extract when injected once, and then deplete that extract. In those cases, using a higher volume syringe to inject will result in more units per extract. You must then draw from the core to get the resulting chem. Examples: The mutation toxins from green extracts. You can also dilute your plasma by, for example, filling a beaker with 40u of water and 10u of plasma; a syringe will collect exactly one unit of plasma this way. (c) means the ability needs to be channeled to work (aka you need to stand still for a while).

Slime Extract and Luminescent Effects
Tier 0
Reagent Extract Effects Luminescent Effects (Minor / Major)
Grey Slime
Water Extract gets filled with Epinephrine. Spawns a monkey cube into the user's hand.
Blood* Extract creates three monkey-cubes. Essential. Spawns a grey baby slime.
Plasma Extract creates a grey slime. Useful as a backup. -
Tier 1
Orange Slime
Water Extract creates a cloud of smoke when injected with at least 5u water. More water injected at once means bigger smoke, up to max 15 water. It'll carry any other reagent already inside the slime extract. Infuses you with capsaicin.
Blood Extract gets filled with Capsaicin Oil when injected with blood. 10u per 1u blood injected at once, up to 100u. Can be turned into Pepper Spray if mixed with ethanol. Spawns smoke around the user. The smoke will purge chemicals in the user's body and infuse itself with them.
Plasma Extract creates a small plasma fire after 5 seconds when injected with plasma. -
Purple Slime
Water - Restores blood volume and nutrition.
Blood* Extract gets filled with regenerative jelly when injected with blood. 5u per 1u blood injected, up to 100u. Similar to omnizine, but non toxic to jellypeople. *Gives some regenerative jelly, healing the user.
Plasma* Extract creates a bottle of slime steroid when injected with plasma. Slime steroid is a potent chemical mix that will cause a slime to produce one more extract when processed, for a maximum of four extra. The steroid only works on live slimes. -
Blue Slime
Water Extract creates foam when injected with at least 5u water. It'll carry any other reagent already inside the slime extract. Cures cellular damage, purges the dna, and reduces radiation on the user.
Blood* Extract creates a slime stabilizer potion when injected with blood. Reduces a slime's mutation chance by 15 percentage points, and carries through across generations. Creates foam from the user, infusing itself with the chemicals in the user's body.
Plasma Extract gets filled with frost oil when injected with plasma. 10u per 1u plasma injected, up to 100u. -
Metal Slime
Water Extract creates 5 sheets of reinforced glass and 15 sheets of glass when injected with water. Creates 5 sheets of glass in the user's hand.
Blood - Creates 5 sheets of metal in the user's hand.
Plasma* Extract creates 5 sheets of plasteel and 15 sheets of metal when injected with plasma. Grinding plasteel will generate plasma and iron, making it a perfect substitute to dark purple slimes. -
Tier 2
Yellow Slime
Water Extracts emit light when injected with water. They can be squeezed to increase the light emitted. Temporarily increases the user's light range and intensity.
Blood* Extract creates an EMP when injected with blood. It's a quite big blast as well, useful if that AI is onto your tricks. *Emits a short-ranged EMP.
Plasma* Extracts become 5k Charge Powercells when injected with plasma. These cells are self-charging, and very useful for cyborgs or APCs, for example. Valuable for R&D. -
Dark Purple Slime
Water - Spawns a plasma bar in the user's hand.
Blood - Spawns a cloud of plasma around the user.
Plasma* Extract creates 3 sheets of Solid Plasma when injected with plasma. Yessir, NT can link anything to the production of plasma. Also useful for further experimenting. -
Dark Blue Slime
Water Extract creates a three-use chill potion when injected with water, which fireproofs anything it's used on. Be a firebug without looking like one! Miners can make good use of this, as it will make them storm-proof. Infuses the user with frost oil and Cryoxadone.
Blood - Spawns extremely cold air around the user.
Plasma Extract creates supercooled N2 gas 5 seconds after injected with plasma. -
Silver Slime
Water Extract creates a random drinks when injected with water, bork bork bork. Spawns a random food in the user's hand.
Blood - Spawns a random drink in the user's hand.
Plasma Extract creates a random food when injected with plasma, bork bork bork. Expect anything except a roburger and gatfruit. -
Tier 2.5
Bluespace Slime
Water Extract will, if injected with water, spawn a Bluespace radio potion. Use it on a sentient animal to let them speak on the radio! Randomly teleports the user a few tiles away.
Blood Extract will, if injected with blood, create 25 Bluespace Floor Tiles, which speed up movement drastically. *Saves the user's position on the first use. On the second use, it will warp the user back on that position. The extract can change user in the meantime.
Plasma Extract will, if injected with plasma, spawn a Bluespace Crystal. They will teleport you when crushed in your hand and teleport anyone you throw it at. Used as a material in techfabs and protolathes. -
Sepia Slime
Water Extract creates some Film and a Camera when injected with water. Spawns a camera in the user's hand.
Blood Extract creates 25 Sepia Floor Tiles when injected with blood. They slow movement speed above them. Stops time for a few seconds around the user. (c)
Plasma* Extract stops local time for 15 seconds, 5 seconds after injected with plasma. The user is not immune. You can throw it. About a 5x5 area. Use with servants. -
Cerulean Slime
Water - Infuses the user with salbutamol, making them able to survive without air for some time.
Blood Extract creates a one-use blueprint when injected with blood. Renaming an area with it (to any name) will turn the floor blue and allow the Slime Console to work on that area, if it has a valid path. Spawns a large amount of breathable air around the user.
Plasma* Extract creates a bottle of extract enhancer when injected with plasma. When used on an extract it adds one use to it. -
Pyrite Slime
Water - Spawns a crayon in the user's hand.
Blood Extract creates a random crayon when injected with blood. Spawns a spraycan in the user's hand.
Plasma Extract creates a can of paint when injected with plasma. For the love of all that is holy, don't give it to the clown! -
Tier 3
Red Slime
Water Extract creates a bottle of speed potion when injected with water. The speed potion will halve the slowdown from any item of clothing or vehicle it is applied to. Infuses the user with Ephedrine, greatly increasing their speed temporarily, while causing side effects such as making you drop held items.
Blood Extract makes nearby slimes rabid when injected with blood. Has some fun uses. If the affected slimes were docile, it removes the docility instead of making them rabid. Enrages slimes around the user.
Plasma* Extract creates a bottle of slime mutation potion when injected with plasma. Makes slimes 12 percentage points more likely to mutate, the opposite of the slime stabilizer. -
Green Slime
Radium Injecting the extract with radium fills it with unstable mutation toxin which trough the help of chemistry can let you make various mutation toxins that turn you into various races. Turns the user back into a human.
Plasma Extract gets filled with imperfect mutation toxin when injected with plasma. 5u per 1u plasma injected. Having at least 4u in your system will eventually turn you into a random jellyperson. They have several pros and cons, but what is important to xenobiology is that slimes will never attack you and your blood is no longer valid for blood-based reactions, as it is replaced by slime jelly. Ingesting more slime mutation toxin when you're already a jellyperson will turn you into another random subspecies. Turns the user into another slime subspecies.
Pink Slime
Water - Switches the user's gender.
Blood Extract creates a bottle of gender changing potion when injected with blood, which changes the gender of any living, gendered thing it is used on. Temporarily pacifies creatures around the user, making them nonviolent for some time.
Plasma Extract creates a bottle of docility potion when injected with plasma, which will nullify a slime's hunger, causing it to become docile and tame, and will let you name it. You too can have your own pet, just like the HoP! If the slime is rabid, the potion will remove its rabid rage but will not make it docile. -
Gold Slime (See here for the list of summonable mobs)
Water Extract spawns one random friendly critter when injected with water. Now you can fill xenobiology with mobs even if you're a giant pussy! Spawns a friendly mob. (c)
Blood* Extract spawns three random dangerous mobs when injected with blood. These mobs are not immediately hostile, but may be provoked by certain actions, proximity to other creatures (such as your slimes) or if they encounter a construct or mech. You can also spawn magicarps! Spawns a dangerous mob. If the user is on harm intent at the moment of use, the mob will be hostile. (c)
Plasma* Extract spawns five random dangerous hostile mobs when injected with plasma. -
Tier 4
Oil Slime
Water - User vomits slippery oil.
Blood Extract gets filled with Corn Oil when injected with blood. About 10u per 1u blood injected. User violently explodes, causing significant damage to surroundings. (c)
Plasma* Extract creates an explosion after a moment when injected with plasma. -
Black Slime
Water - Turns the user into a slime. (c)
Blood - Turns the user into a shadowperson. (c)
Plasma* Extract gets filled with advanced mutation toxin when injected with plasma. 1u per 1u plasma injected. Turns you, or others, into a sentient grey baby slime. Beware, slimes are still not harmless. This mutation can be prevented with frost oil, if you are quick enough. Acts instantly on slimepeople. Advanced mutation toxin can be used to make toxins that turn you into some more powerful mutation toxins. -
Light Pink Slime
Water Extract creates a bottle of renaming potion when injected with water which let a lets a creature rename itself. Spawns a renaming potion, which offers anyone it's used on the option to choose(write) any new name.
Blood Spawns a sentience potion.
Plasma* Extract creates a bottle of sentience potion when injected with plasma, a potent chemical mix that will bring human level intelligence to any animal, slime, monster or generally active thing you feed it to. Make Ian sentient! Create an army of gold slime minions! The possibilities are limited only by your own deviousness and the number of ghosts in the round. -
Adamantine Slime
Water - Temporarily increases the user's armor, reducing overall damage taken.
Blood - Turns the user into an adamantine golem. (c)
Plasma Extract creates an adamantine bar when injected with Plasma. It can be sold at cargo for a high amount of credits, or 25 adamantine can be used inhand to craft a golem shell. Golem shells can then be finished with ten sheets of any material, which will affect the golem's properties. After completion, a ghost can possess the shell to spawn as a golem. It will follow the orders of who finishes the shell above anything else, and inherit conversion antagonist status, such as cult, from their owner. -
Special
Rainbow Slime (To attain this rare slime you must breed a slime with a 100% mutation chance!)
- Turns the user into an adamantine golem. (c) Changes the user's color randomly.
Water -
Blood Extract will generate a mind transference potion when injected with blood. You can use it to transfer your mind into a creature. This is not reversible and will result in your old body's instant death.
Plasma Extract will explode into randomly-colored slime cores when injected with at least five units of plasma. Spawns a random slime core.
Special Extract will explode into randomly-colored slime cores with water, plasma, and blood in them when injected with slime jelly. This will trigger their reactions unpredictably and chaotically, and almost certainly cause mayhem wherever it happens. -
Special* Extract will spawn a flight potion when injected with 5u of Holy water and 5u Uranium. -

Crossbreeding

Slimes can be crossbred with other slimes! In order to crossbreed a slime, feed an adult slime 10 of any color extract. If you give one extract to an adult slime, you can then use your Bio Bag to feed the last 9. This will cause the slime to boil away into nothing more than a single, extremely powerful extract, with a unique effect depending on the color you fed it. For example, feeding 10 grey extracts to a yellow slime will result in a reproductive yellow extract. The color of the 10 extracts you feed is the dominant color.

Crossbreeding Chart

Other charts to be used as a reference in crossbreeding slimes can be found here, and here, albeit in different formats than the form used below. For the design document containing planned additions, see here.

Dominant Extract: Grey (Reproductive )

Dominant Extract: Orange (Burning )

Dominant Extract: Purple (Regenerative )

Dominant Extract: Blue (Stabilized )

Dominant Extract: Metal (Industrial )

Dominant Extract: Yellow (Charged )

Dominant Extract: Dark Purple (Self-Sustaining )

Dominant Extract: Dark Blue (Chilling )

Dominant Extract: Silver (Consuming )

Dominant Extract: Bluespace (Warping )

Dominant Extract: Cerulean (Recurring )

Dominant Extract: Pyrite (Prismatic )

Dominant Extract: Pink (Gentle )

Dominant Extract: Black (Transformative)

Dominant Extract: Adamantine (Crystalline)

So You're a Traitor

What you can get here that can't be gotten easier elsewhere is an EMP and random hostile animals which include a few very deadly ones CARPS SPACE BEARS ALIUMS SPIDERS HIVEBOTS PINE TREES OH GOD IT'S HORRIFYING. Releasing the slimes is somewhat viable, but you will likely get caught doing so, and baby slimes are rather tame (Unless you have Red Slime Essence. Then it's a party.)

On the plus side, you do have a disposal chute that goes directly to space. Pretty handy for disposing of evidence, or people.

Also remember the havoc with grenades and bombs you can cause! If you can get access to chemistry as well you can make some interesting grenades. Advanced mutation toxin with sugar in one beaker, phosphorus and potassium in the other. Set a timer in the Medbay and drop it and listen to all the people turning into Slimes. This is when you laugh to yourself and realize it backfires when all the slimes attack you.

A full guide to ruining someone's day with slimes:

  • Red - Makes all slimes within sight range hyper aggressive. Also makes speed potions which can make it easier to evade guns while firing off other slime cores while still keeping high armor values or being able to go in space freely.
  • Green - Produces 1 unit of a chemical that turns people into different races including slime persons. Use it on someone and convince the AI that they're a danger to humanity. Needs at least 5 units for it to work in a smoke grenade.
  • Black - Turns people into actual slimes, no fort save. Again, 5 units in a smoke grenade will make for a very interesting shuttle flight.
  • Orange - Ignites a large fire.
  • Yellow - Huge EMP.
  • Silver - Only way to get real roburgers (with nanomachines) and motherfucking GATFRUIT.
  • Gold - We all know what this does.
  • Sepia - Stops time in a small radius, allowing you to wreak many kinds of havoc.
  • Oil - Explosion.
  • Adamantine - Makes golems that can be converted to the cult/soul shard/revved. They have to follow orders given to them by their creator so feel free to make them suicide bomb with gold slime cores.
  • Light pink - Enables you to make sentient beings, including anything a gold slime extract can produce. Magicarps included.

Don't forget about some of the wonderful slime crossbreeds for beating the piss out of fellow crewmen!

  • Burning rainbow makes a rainbow knife that does random types of damage, making it a lot harder to heal from!
  • The regenerative extracts can provide an important health boost in the middle of a fight, and Stabilized rainbow can auto-apply them in danger!
  • Looking to go out with a bang, literally? Take a stabilized oil with you, hug your target, and kill yourself!
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