- Strategy
Game
Master of Orion
Master of Orion, the award-winning and critically acclaimed strategy game, has returned. The iconic 4X strategy gameplay of Explore, Expand, Exploit and Exterminate that formed the blueprint for a whole generation has been resurrected and upgraded. Stunningly enhanced for a new line of players, Master of Orion inherits and redefines its core elements, providing a graphically beautiful and deeply rewarding experience. Master of Orion is the birth of a new era of strategy gameplay featuring the latest multi-platform technology and graphical systems. Within the depths of vast and volatile worlds,
The ascendant spacefaring 4X strategy game returns! A new chapter in the epic Master of Orion saga is poised to once again capture the imaginations of millions of gamers.
About Master of Orion
- Released
- August 2016
- Developer
- NGD Studios
- Publisher
- WG Labs
- Engine
- Unity
- Platforms
- Linux · PC (Microsoft Windows) · Mac
Release, studio and platform data from IGDB. Store links go to the sellers, not to us. We do not sell games and we do not host files.
Browse everything
Sorted, filterable and paged. Every link goes to the author’s own download.
From the developers
Official announcements, newest first. Posted on Steam.
- Community AnnouncementsNi Hao! Now in Chinese!{STEAM_CLAN_IMAGE}/9085117/2943556b69580bedbfc6236c095f9fad20620a40.png Welcome, Star Conquerors! We have noticed an interest in Master of Orion among our Chinese players, so have released a small patch with language support for the players from this region. This patch does not make any changes to the gameplay. This version introduces the following languages: Chinese Traditional Chinese Simplif...
- Community AnnouncementsMaster of Orion – Patch Notes v55.1.1Greetings Explorers, We have just released a minipatch that tackles the following ingame issues: Fix for Special Abilities not working in Custom Races Fix for espionage UI refreshing when switching selected agents Fix for tactical combat freezes Trilarian intro subtitles have been fixed Conquer the Stars!
- Community AnnouncementsMaster of Orion – Patch Notes v55.1.1Greetings Explorers, We have just released a minipatch that tackles the following ingame issues: Fix for Special Abilities not working in Custom Races Fix for espionage UI refreshing when switching selected agents Fix for tactical combat freezes Trilarian intro subtitles have been fixed Conquer the Stars!
- Community AnnouncementsMaster of Orion – Patch Notes v55.1Greetings Explorers, Today we released an update that addresses certain issues present in the last build. Read on for the full list of changes: Improved Performance: Turn processing has been greatly optimized. Turns now process up to 50% faster and scale linearly as the game progresses, making long matches in huge galaxies more playable. Fixed a bug that caused the MIRV missile modifier to act...
- Community AnnouncementsMaster of Orion – Patch Notes v55.1Greetings Explorers, Today we released an update that addresses certain issues present in the last build. Read on for the full list of changes: Improved Performance: Turn processing has been greatly optimized. Turns now process up to 50% faster and scale linearly as the game progresses, making long matches in huge galaxies more playable. Fixed a bug that caused the MIRV missile modifier to act...
- Community AnnouncementsMaster of Orion: Conquer the Stars - Game Manual UpdateGreetings Explorers, Today we’ve released a new version of the game manual, which can be found in the local files of Master of Orion (Game properties / Local files / Browse local files / Manuals). The updated version includes the Revenge of Antares features. Let us know what you think about it! We also want to inform you that a new stability patch is currently being worked on, and it should be...
- Mods indexed
- 342
- Versions
- 0
- Newest tracked
- none yet
- Most disruptive update
- No breakage data for this game
Most downloaded
Measured from the source's own counts, summed across every release.
- 5X - The Ultimate Balance ModSpud Dastardly presents the biggest Master of Orion: Conquer the Stars mod in the galaxy! This mod is massive overhaul of the gameplay experience. It's effectively a full expansion pack for the game. It includes a total rebalance of every aspect of gameplay, new technologies, improved AI, and muc...52.7k downloads
- Unofficial Code Patch Steam WorkshopVERSION UCP 6.4b To make this mod actually work you MUST follow the included “ReadMe.txt” for the install instructions. This must be done everytime you want to upgrade to the new version! Version 6.4+ of UCP requires a new game, older saves will not work. Here is a Steam Guide for installing or f...37.7k downloads
- 5X UCP Compatibility Mod (5XCPC)This mod is for people using 5X - The Ultimate Balance Mod with WhatIsSol's Unofficial Code Patch. The base 5X mod is designed to run without UCP. The purpose of this mod is to re-optimize 5X to run with UCP and to take advantage of additional modding features added by UCP. This mod shouldn't be...28.3k downloads
- MorePerkPointsThis mod adds 200 perk points when building a custom character. Note: I actually forgot about this mod and I found it when I started to play the game on my steam deck. Sorry about not putting a proper description in the mod originally, I appreciate the “constructive feedback 😂. I will also have t...22.7k downloads
- CheapPerksA simple mod that reduce the cost of all perks to 1. This allows you to make a custom super race. Enjoy.18.6k downloads
- Diverse Specials and Massive Planets v2.5 - 5X/UCP Compatible(This is the full version) Compatible with 5X v4.4.1 This mod adds over 100 new specials that can appear on planets in game! Massive planets can be found now too, at a low chance and only in certain orbits. Between the Advanced Resource Extraction tech field and a few others, I've added 13 techno...16.7k downloads
- Pollution Structures Boost**Updated to work in 2026!** This improves the pollution cleanup rate of all pollution management structures, and reduces the maintenance costs of all of them by 1. The improvements are as follows: Atmosphere Renewer: 5 => 10; Toxic Processor: 5 => 15; Pollution Processor: 15 => 30; Core Waste Du...15.6k downloads
- Planetary Core Engineering v2Tired of not being able to terraform Volcanic and Inferno planets? This mod allows players to terraform Volcanic and Inferno worlds. Any race with the Lava Breather perk will be able to build the Core Destabilizer colony project. The Core Destabilizer will convert any non volcanic world to Volcan...12.5k downloads
- Stronger Fortifications v1 (For 54.11)Large fortifications like starbases should be stronger than they are. They should serve as a serious deterrent to planetary conquest. Stronger fortifications can also minimize the damage of losing a fleet in a large battle, making it easier to mount a resistance to an invading force. Changes to s...11.8k downloads
- Unlimited Doom Stars (Up-to-date as of 2/7/17)Tired of being restricted to building just 1 Doom Star? Well, now that restriction has been lifted. Want to quickly see this mod in action? Try running it with this mod:9.8k downloads
- Custom 5X and DSMP AssetsNOTE: Run installer if you haven't since March 1, 2024 Using this mod requires more than just subscribing to it. Please follow the install instructions below. This mod contains some custom assets I created for 5X - The Ultimate Balance Mod. In particular it has alternate ship icons for the hulls...8.9k downloads
- All AI + 5X Galaxies v1.9This mod combines the ALL AI mod by Dazgrum, which lets you play with more than 9 players on a galaxy, with the added galaxy types, ages, and density settings from 5X - The Ultimate Balance Mod. The prerequisite mods/DLC are optional; just make sure you don't try to start a game with more races t...8.7k downloads
- Split Tech Tree (5X Addon)This mod splits the tech tree into 8 branches: Construction, Power, Sociology, Chemistry, Computers, Biology, Fields, and Physics. Each tech is reclassified into one of these branches primarily using MoO2's tech tree as a guide for which techs should go into which branches. Starting ages and avai...8.4k downloads
- Battle Pods Revert**Updated to work in 2026!** This reverts Battle Pods to providing 50% extra space with 0 space cost. The production cost is adjusted slightly up to the old value of (2 + Hull Size * 2.7) There should be no conflicts with any other mods as long as they do not modify Battle Pods. This mod should w...8.1k downloads
- Perk Points 15Simple mod that gives Custom Race 15 points starting instead of 10. I find it a bit more balanced.7.7k downloads
- MoOlaThis is the closest to an unlimited money cheat we're going to get. This mod adds a perk to the custom race screen that, if chosen, unlocks a structure buildable only on your homeworld that gives 100,000 BC per turn. The name of the mod comes from the MoO2 cheat code of the same name. Please let...7.5k downloads
- Diverse Specials and Massive Planets v2.5This is the original stand-alone release, no other mods are required for this version. Over 100 custom specials can now appear on planets during galaxy generation. Specials range from simple things like "Merchant Traders" to the more rare and desirable "Orion Artifacts". Some of these are inspire...7.3k downloads
- Lots of PlanetsNow part of the: T-Best Uber Unbalanced Mega Mod Normal density now has up to 35% chance of having 5 planets per star. High density now has up to 90% chance of having 5 planets per star. I actually tried to create 10 planets per star, but it was a mess (3 planets overlapping, etc). As I was doing...7.2k downloads
- Uber Custom RaceThis mod increases the bonuses of many perks and reduce the cost so you can make an overpowered uber race if you want to. Technologist is expanded to give more benefits. I recommend No Pollution mod if you want to go with the high production bonus. In some cases Omniscience has caused my game to...6.9k downloads
- Even Bigger PlanetsInspired by the "Diverse Specials and Massive Planets" mod this one simply adds two more planet sizes to the game - Colossal (size 40) and Gigantic (size 50). It also changes Orion to be Gigantic. Though it doesn't need the "Diverse Specials and Massive Planets" mod (i shamelessly copied the mass...6.8k downloads
- Bigger Planets 2.0Description edited on September 14, 2018 to say this mod still works with UCP 5.8 and 5x 4.3.0. Enjoy! This little mod just raises the sizes of the planets. Tiny worlds go from 8 max to 18 max, huge worlds go from 24 max to 42 max. Watch out for much higher pollution amounts. More workers means m...6.8k downloads
- CheapPerks - Creative gives +50% researchSimple mod that reduce cost of perks to 1. This allows you to make a custom super race. Same as my CheapPerks, but I changed Creative to automaticly give +50% research rate (instead of +25%). Enjoy. This mod has been reported to no longer work after latest patch. I dont know when I will have time...6.1k downloads
- Stronger Ships RemasteredSimply makes ships, monsters and space fortifications stronger in the aim of having longer battles. Ships have received the following improvements: -HP: 10x -Space (for modules): 5X Module costs have also been edited to accommodate these changes.5.5k downloads
- [OBSOLETE] 12 Slot Hull & AutoExplore FDC- 12 slots for weapons and 12 slots for specials. From frigate to doomstar. - Frigate, Destroyer and Cruiser can now auto-explore. Game version 51.3. ShipHullTypes.yaml modified.5.4k downloads
Browse all 342 Master of Orion mods Sortable by downloads, rating and date.
More strategy games see all
Why Master of Orion mods break
A mod is compiled against one version of a game. When the game updates, anything that reached into the parts that moved stops working, and it usually stops working silently rather than with a message that explains itself.
That is what the table above counts. It is not a guess: each row is a mod the community has reported as broken by that specific release. The number is a fair measure of how disruptive an update was, and it is the reason people delay updating a game they have modded heavily.
Common questions
Does IndexGG host Master of Orion mods?
No, and it never will. Every download link points at the author's own page on Nexus, GitHub, CurseForge or wherever they published it. We index the ecosystem; the files stay with the people who made them.
Where does the compatibility data come from?
From the communities that maintain it in the open, not from guesswork. Each claim carries how it is known, so a reported breakage is never presented as though the author said it.
Why is a mod listed as broken when it works for me?
Compatibility depends on your exact game version and the rest of your load order. A mod marked as broken in one release may work fine on an older one, which is exactly why the version is recorded next to the claim rather than a bare yes or no.