Source-checkedWorld generation

Island Keeper

by Vavann25 · for Core Keeper

Island Keeper is a simple mod that add a map for you to play around within a new playthrough in any gamemode (Creative / Casual / Normal / Hard), and is 100% usable in vanilla CK.

91Downloads
2 mo agoLast updated
mod.ioSource

About Island Keeper

From mod.io

Island Keeper is a simple mod that add a map for you to play around within a new playthrough in any gamemode (Creative / Casual / Normal / Hard), and is 100% usable in vanilla CK.

Island Keeper


Island Keeper is a simple mod that add a map for you to play around within a new playthrough in any gamemode (Creative / Casual / Normal / Hard), and is 100% usable in vanilla CK.

Made in Core Keeper 1.2.1.5, the map may miss some vanilla features from after this version, it only needs to be installed on the client.

 

FEATURES

This mod features a map playable like a normal world. In creative, the map can be fully revealed by interacting with the cartography table.
Island Keeper offers a new way to play the game. The map is made of small and big islands, all pretty close of each others, up until the custom Passage biome.

It include :

  • The change of many original scene in the game to make it more challenging.
  • A new way to get some legendary weapons, and also add more scanable legendary items scenes.
  • A new painfull, and more stressfull Passage.
  • 2 customs trial scenes around the start that need at least 2 player to be beaten to help building support.

Note: Every islands are made so that the water inside sould'nt flood everything, unless you use a bucket. (The map is made so that WITHOUT floading everything and abusing the boat, it should still be enjoyable)

 

HOW IT WORKS

Select moded map when creating a new world.
Then pick the Island Keeper map with the gamerule you wants.
Install on the client only.
No commands or extra configuration needed.

 

MOD USED & WHY

Since the Core Keeper world is so big, I had to use mods to make it faster, and also to remove / move indestructible objects. (like indestructible & explored waypoints) And still, with everything on, it still took me around 350h~ to make. (of just removing and placing stuff)

  • Original untouched world from 'Fully Explored World seed: #BlameTessVoid' by JayJay_89, yes, this is the original world and my sanity is nonexistant, but it allowed me to select what I wanted to keep or not.
  • 'Instant Portal', 'ChatCommand' made by limoka8, and 'Better Text Input' by DongDool. Without the 'ChatCommand' mod, this mod would'nt be here (/removetilearea <3) and 'Better Text Input' is just a MUST.
  • 'ItemBrowser' by moorwol, mod that made my life way easier.
  • 'MoreMapReveal' by ninakoru, Its always better when you make a map to actually see everything (combined with /setreveal from the 'ChatCommand' mod)
  • 'Teleport Anywhere' by gincodes, just an amayzing mod for map maker with a huge project like this one.
  • 'QualityOfCoreKeeper' that I used many times to remove every items on the map, made by ReishyouSose, also the one that helped me mostly around the start of this adventure by helping me with our mod 'SpawnScene'.
  • 'Unity Explorer'... The big one.. It allowed me to do so much sorcery, thanks to limoka8 (first, for making this mod), and ReishyouSose to help me undestand how to exploit the potential of this mod.
  • 'Placement++' by unholyzealot, which replaced 'PlacementPlus' that I was using for 3/4 and made my progress go even faster.
  • 'Never Dark' by the goat Parcew itself who helped me setup Island Keeper, 'Never Dark' was really usefull in so many ways and goes way too well with 'Placement++'.

Thoses are all mods from very talented peoples from the modding community, and I'm sincerly very greatfull to thoses.

 

CREDITS

Created by Vavann25
A huge thanks to limoka8, unholyzealot, ReishyouSose, and Parcew, without them the mod would've take ages / would'nt have came to life. 
Also thanks to the incredible troll that is Rupas, leaving "bugs" that I've to fix myself or else the game is unplayable. (Small context, a scene had something obviously missplaced)
Special thanks to the rest of the Core Keeper modding community.

 

FEEDBACK & SUPPORT

Discord: @vavann25, or even better, join the official Core Keeper server and ping me there. (The sorcerer of Core Keeper)
You can also leave a comment on the mod page.

Highlights

From source data

Footprint

Rated a light load on a server.

Last update

Its author last shipped an update 2 mo ago.

Island Keeper on Nxeon

From our catalogue
One-click install
Supported on Nxeon Core Keeper servers. We download it from mod.io, place it, and restart the server.
Server side
Client-only: it runs in players’ own games, so it can’t be installed on a server
Server load
light
Smallest plan we suggest
Core Keeper — 2 GB (2 GB RAM). This follows our own load rating above, not a benchmark.
Latest build
v1.0, released 2026-08-27

Run Island Keeper on a Core Keeper server

Pick a server or deploy a new one above; it is installed in one click.

What kind of mod it is

From the catalog
Listed on mod.io as “World”

World generation

Changes or adds to how new terrain, biomes and structures are created.

Client-side mod

From source side support

mod.io lists Island Keeper as not supported on servers. It runs in players’ own games, not on your server.

Compatibility

Game
Core Keeper
Runs on
Client only

Verified at the source

  • ✓mod.ioOfficial listing, checked 2026-11-03Open ↗
  • ✓AuthorVavann25, as published on mod.io
  • ✓LicenseNot published by the sourceFree

Island Keeper, answered

Generated from the mod’s own source data.

Do my players need to install Island Keeper?

mod.io lists Island Keeper as not supported on servers. It runs in players’ own games, not on your server.

Is it free?

Yes. Island Keeper is free to download from mod.io.

How do I add it to my Nxeon server?

Use “Add to a server” on this page, or open NxLabs from your dashboard. We install it, restart your server and switch it on.

NxLabs

Run Island Keeper on a Core Keeper server.

Deploy in about a minute from $4.99 a month, then add Island Keeper in one click.