Fusion Horizon
v0.2.3Fusion Horizon is a mod that allows you to unlock nuclear fusion and related future technologies
- 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.

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++.

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.

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
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
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
* A CANDU 3-related bug involving a power drop has been resolved
v0.2.2
- Game version
- 0.8.6
- Released
- Aug 28, 2026
- File size
- 2.4 MB
- License
- CoI-Open
* A bug related to CANDU 3 and its overheating has been fixed
v0.2.1
- Game version
- 0.8.6 - 0.8.6 re-verified
- Released
- Aug 24, 2026
- File size
- 2.4 MB
- License
- CoI-Open
* 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
v0.2.3 | 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
No other mods depend on this mod yet.