Fusion Horizon

v0.2.3

Fusion Horizon is a mod that allows you to unlock nuclear fusion and related future technologies

Stable 1 month ago CoI-Open Source code
Source code
https://github.com/UlisseWolf/Fusion-Horizon-Mod-for-Captain-of-Industry
Website
https://discord.com/channels/803508556325584926/1515160205204394045
Tags
Overhaul Quality of Life Production Power Settlement Research Endgame

Fusion Horizon is a mod that introduces new mechanics related to the nuclear industry, extending all the way to nuclear fusion and the use of plasma in other industrial processes. The mod is based primarily on existing technologies or those currently under development, although it does contain some science-fiction elements.

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All new items added by this mod must be unlocked through research.

CANDU Reactor

Adds CANDU I, II, and III heavy-water reactors, allowing natural uranium to be used as nuclear fuel. CANDU I upgrades directly into CANDU II as a real in-place tier, exactly like vanilla reactor upgrades. CANDU III is more powerful still, but its entire coolant/steam circuit runs tritium-rich instead of the regular kind, requiring a dedicated Tritium Separator to recover both Tritium and reusable Super-Pressurized Heavy Water from it.

Heavy Water and Cooling Loop

Introduces heavy water as a moderator for CANDU reactors, and incorporates heat exchangers to create the primary and secondary circuits of the CANDU nuclear reactor cooling system.

DUPIC Fuel Reprocessing

Adds DUPIC (Direct Use of spent PWR fuel In CANDU) fuel reprocessing: mechanically reworks ordinary Spent Fuel into DUPIC Rods via the real-world OREOX process, without ever chemically separating out plutonium. DUPIC Rods only burn in CANDU II/III; the Spent Fuel they leave behind is too isotopically degraded for further OREOX recycling and instead feeds a Fast Breeder Reactor's breeding blanket.

Nuclear Fusion

Introduces deuterium and tritium as the primary fuels for the nuclear fusion reactor. Tritium is extracted from lithium and requires Recipes++ and WorldGen++.

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Industrial Plasma

Enables the extraction of plasma from the nuclear fusion reactor, and after purification processes, yields pure plasma for use in other industrial applications, including sealed Plasma Modules for advanced medical equipment.

Isotope Separation & Nuclear Medicine

An endgame fission technology that separates out fission platinum-group metals and sealed radioactive sources from ordinary Fission Products, yielding reusable Industrial Isotopes (and leaving behind Depleted Fission Products with a shorter storage time than the untreated kind). Industrial Isotopes combine with Plasma Modules to produce Medical Supplies IV, the most advanced tier of healthcare, feeding directly into the vanilla Clinic.

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Extended Recipes

Introduces additional recipes, including Organic Pesticides and Bioethanol (both adapted from Recipes++, unlocked alongside vanilla Sugar Cane research and Recipes++'s Advanced Farming), among others.

ROADMAP

  • Adjusting existing recipes based on feedback
  • Improvements to the enrichment process/plasma extraction in the nuclear fusion reactor
  • Further plasma implementation across additional industrial production lines
  • Possible integration with the Metallurgy+ mod
  • Additional recipes and new futuristic technologies
  • New machine models introduced by the mod (possible, but low priority for now)

Release V 0.2.1

Aug 24, 2026

Release 0.2.1

  • Migrated the mod using the DLL system implemented by MaFI
  • Fixed visual bugs caused by the Custom Asset Loader
  • Revised the search system and implemented progressive unlocking of searches
  • Added the CANDU 3 Nuclear Reactor (240 MW) and, consequently, the tritium separator and the dual cooling cycle for heavy water exiting the nuclear reactor
  • Added DUPIC reprocessing
  • Added fission product reprocessing, resulting in the creation of industrial isotopes (which must be stored in nuclear repositories) and depleted fission products, which must be stored and retained for 50 years
  • Added Medical Supplies 4, which uses industrial isotopes, plasma modules, and Medical Supplies 3
  • Added native language support for English, Italian, French, German, Spanish, and Portuguese
  • Added Russian translation created by Hoochie63

Release V 0.1.1

Aug 09, 2026 v0.1.1

A minor update to the mod that lets you discharge helium using the smoke stacks

v0.2.3

Latest
Game version
0.8.6
Released
Sep 22, 2026
File size
2.4 MB
License
CoI-Open
Save-game: Add · Remove
Changelog
* A CANDU 3-related bug involving a power drop has been resolved
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v0.2.3 | 2026-09-22

* A CANDU 3-related bug involving a power drop has been resolved

v0.2.2 | 2026-08-28

* A bug related to CANDU 3 and its overheating has been fixed

v0.2.1 | 2026-08-25

* Migrated the mod using the DLL system implemented by MaFI
* Fixed visual bugs caused by the Custom Asset Loader
* Revised the search system and implemented progressive unlocking of searches
* Added the CANDU 3 Nuclear Reactor (240 MW) and, consequently, the tritium separator and the dual cooling cycle for heavy water exiting the nuclear reactor
* Added DUPIC reprocessing
* Added fission product reprocessing, resulting in the creation of industrial isotopes (which must be stored in nuclear repositories) and depleted fission products, which must be stored and retained for 50 years
* Added Medical Supplies 4, which uses industrial isotopes, plasma modules, and Medical Supplies 3
* Added native language support for English, Italian, French, German, Spanish, and Portuguese
* Added Russian translation created by Hoochie63

v0.1.1 | 2026-08-09

* Added the ability to eliminate Elio through the smokestacks

v0.1.0 | 2026-06-13

* Initial improvements
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