491 ratings
Call of Cthulhu - Cosmic Horrors
Mod, 1.0
File Size
11.165 MB
Sep 18, 2016 @ 6:57am
Oct 26, 2018 @ 8:29pm
59 Change Notes ( view )

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Call of Cthulhu - Cosmic Horrors

In 1 collection by Jecrell
Call of Cthulhu - Rim of Madness Expansion Pack
20 items
*Add Lovecraftian monsters to your RimWorld experience!* There is a lingering fear that strokes the hairs on the back of the necks of your colonists. Something terrible is coming, and there is little time to prepare. Cosmic horrors are already upon us.

This is an attempt to create the minor races of H.P. Lovecraft's weird fiction mythos in the RimWorld engine. Some behave the same as hostile factions that raid colonies such as mechanoids or insectoids. Others can be deadlier, however.

Adds the following cosmic horrors to your game:
  • Star-Spawn of Cthulhu
  • Shoggoths
  • Mi-Go
  • Deep Ones
  • Star Vampire
  • Dark Young
  • NEW Chthonian

You will need to start a new game OR for previously saved games without monsters, you can try using Orion's Faction Discovery Mod
*phew* Now that that's out of the way. Onto the notes section!

  • Each monster has its own unique anatomical skeletons, organs, and body parts. Some special powers were given to psionic beasts.
  • Each monster has special sound effects.
  • More creatures will be added in a second update in the near future. A third update will flesh out these cosmic horrors with true special abilities true to their literary counterparts.
  • Since I am one person, I can't attest to how balanced the monsters are, and I am definitely looking for feedback from player experiences. Let me know how they are in your game.

Update 1.3
  • Dark Young and Dark Young Herd incidents added to the game.
  • Greater Deep Ones added to the game.
  • Star Vampires rebalanced to be more numerous at higher difficulties.
  • All cosmic horrors have age ranges from Spawn to Eldritch.
  • Sanity loss effects now apply when observing Cosmic Horrors.
  • Mood loss effects now apply when observing Cosmic Horrors.
  • Sanity Loss effects further rebalanced

Call of Cthulhu Mods
Recommended Mods

Credited Sources

Have fun!

Still there?
Jecrell here, lead programmer of the Call of Cthulhu mod series.

Want to buy me a coffee? Fuel my madness for mods here below.
Popular Discussions View All (22)
Dec 24, 2018 @ 3:51am
Ideas & Suggestions
Sep 28, 2018 @ 8:53pm
i have all the mods that work with the new beta
Aug 8, 2018 @ 4:45am
Dark Young throw an error whenever they try to attack something
< >
Fishkeeper Feb 9 @ 9:16pm 
Well, I got that problem to stop by putting the Horror mods at the bottom of the list, but none of the beasties are spawning. Ideas?
Fishkeeper Feb 9 @ 8:39am 
I'm getting a lot of bug reports when I try to load the mod list with this in it. When I try to load a planet, I can't- it says "generating planet" for a little while and then pops back to the planet creation screen.
Some of the error stuff is below. There's also a lot about how it can't seem to find the files for a lot of the creatures.
Any tips?

Could not find a type named CosmicHorror.JobDriver_HaulSacrifice
Verse.Log:Error(String, Boolean)
Verse.ParseHelper:FromString(String, Type)
Verse.DirectXmlToObject:ObjectFromXml(XmlNode, Boolean)
System.Reflection.MonoMethod:InternalInvoke(Object, Object[], Exception&)
Araylie Feb 5 @ 4:02pm 
I can't summon the middle creature of the 3th pictures... How do I summon it ?!
Meia-Oito (Restless Souls) Jan 30 @ 10:03am 
Hey, what about making a patch for animal prosthetics and gear? Any plan for that in the future?
❂Jamie❂ Jan 30 @ 8:19am 
Okay thank you. I guess it would be pretty much impossible to successfully get a baby cthonian from birth to adulthood via normal means. I almost forgot I had age pills in my modpack. Guess I better start investing in them. Thanks anyway!
Meia-Oito (Restless Souls) Jan 30 @ 7:19am 
Chtononian Larva grows up, but it takes a lot of time, just like the other monstruosities like the Dark Youngs and formless Spawn. I can't quite remember the exactly numbers for the Cthonian, but for the Young Dark One are: 200Y/400Y/600Y/900Y. So, it's only possible with the aid of ageing mods or you manually increasing it's age by the dev console.
❂Jamie❂ Jan 29 @ 12:40pm 
Does anyone know if anything special comes from Chthonian Larva? Do they actually mature into the creatures that come out of the sinkhole or do they remain as larva forever? If they do grow up, how old must they be to "mature"? Not a massive amount of info on the mod page :/
☢SAF OVL☢ SCP-966-1 Jan 27 @ 3:22am 
i keep getting so many errors in the console, and i have no idea how to fix it
nullthingclass, ThingWithComps and config errors
dafuq is going on?????
Beetroots Jan 24 @ 1:01am 
lol scribblenauts cthulhu
[PTL] BobsGuns Jan 22 @ 9:03am 
So uh... strange kibble... Thought it would give my animals psionic abilities... Not good considering the number of aerofleets and boomalopes I had in my wooden base. "Had" being the important part there. Cause I now have neither... yay...