Citadelum Update — Mod Compatibility Status & Broken Mods List

4/11/2025 — Devlog XVII: RUBICON Huge gameplay update and new features in Citadelum

🧠 What This Means for Modders

Devlog XVII: RUBICON Huge gameplay update and new features in Citadelum — a general update — most mods survive, but check the broken list below. Roll-back guide →

📋 Patch Notes

[p]Ave, citizens of Rome, It's been six months since the launch of Citadelum, and from our team, Abylight Barcelona, we want to thank the trust and commitment of all those players who have already built their own Roman empire with us. [img src="{STEAM_CLAN_IMAGE}/44838290/b5e23adc86b2b794b4c32014827c8125da507bf2.png"][/img]We have listened to the feedback from the community, and worked hard to offer you a new version of the game; [b]Citadelum 2.0 Julius is a free update[/b] that adds new gameplay options, more depth to the management and construction of the cities and introduces new buildings and mechanics. In addition, this update is accompanied by a technical optimization ([url="https://store.steampowered.com/news/app/2603020/view/830456433963173676"]Devlog XVIII: AUREUS[/url]) that improves the game performance on a wide range of PCs. With this crossing of the Rubicon, Citadelum begins a new stage. Our strategy and city building game is even better and bigger, thanks to you. Below you can read the complete list of improvements that have been added in this new version. This is just one more step in the ascent of the game. We continue to work to make it the game that satisfies all players, both strategy fans and those who want to get started in the genre. Roma Victrix [/p][h2]New resources and production buildings[/h2][p]Now you can extract Salt and Clay, and produce Olives, Oil, Clay Bricks, Ceramics, Cheese and Honey in your settlement. New resources: [img src="{STEAM_CLAN_IMAGE}/44838290/b4b84cff03bab28c5eab31814a6fdd24fe4453da.png"][/img]New production buildings: [img src="{STEAM_CLAN_IMAGE}/44838290/a8ae3c43033e1c4037666572636d1dd75ecb66d5.png"][/img][/p][h2]More complex production chains[/h2][p]Some products such as Bread now need to combine two resources (Wheat and Salt). [img src="{STEAM_CLAN_IMAGE}/44838290/ad70f2e2367a3e109fc2dec08a9b650b021cbbab.jpg"][/img][/p][h2]Technology improvements[/h2][p]Upgrading the technological level of your city will improve the performance of your buildings and increase the capacity of your warehouses. Thus, when you reach a certain prestige in your city, the possibility of increasing your technological level in exchange for materials will appear in your city's forum. [img src="{STEAM_CLAN_IMAGE}/44838290/0732c122bf4d309cf1dc7bbb9a5bc920a267d521.png"][/img] [/p][h2]Diplomatic relations with cities[/h2][p]The better relationship you have with each city, the better prices you will have to trade and the more troops you will be able to recruit from them. [img src="{STEAM_CLAN_IMAGE}/44838290/3922f8daf0309752e3079dbeeb40cfae9de9697e.jpg"][/img][/p][h2]Secondary missions[/h2][p]Periodically the different councilors of the city will make requests to be fulfilled in a period of time. If they are fulfilled on time you will get benefits but if not... there will be punishments. [img src="{STEAM_CLAN_IMAGE}/44838290/7fccabf0350aab0f99c3d58bacc6b6aad3121d3a.png"][/img] [/p][h2]Trials[/h2][p]Once you have built the Palace of Justice, you will have to make decisions about incidents that affect your city. In each trial you will be presented with two decisions, each one with its consequences (they can be positive and negative). It is important to keep the level of justice high as it influences the town's favor. [img src="{STEAM_CLAN_IMAGE}/44838290/5cd19b58af5b7b030daf8020b186780351b248bb.jpg"][/img][/p][h2]Health system improvements[/h2][p]We have introduced several important changes in the health of the population. Now the health of your town depends on two factors: [/p][list][*][p]Salubrity: frequently dead people will appear in your settlement, either by natural death or by some violent event such as assassinations or revolts. These dead will remain in the streets lowering the health of your town. To keep the streets clean it is important to build [b]Morgues [/b]that cover all of your inhabited areas. [img src="{STEAM_CLAN_IMAGE}/44838290/f42c3a72e8d9430f18504a71439b221e93061b3f.png"][/img][/p][/*][*][p]Health in the houses: to maintain the health of your houses to the maximum it is important that they are covered by maintenance buildings and medical centers. [/p][/*][/list][p][img src="{STEAM_CLAN_IMAGE}/44838290/5e476ea7e1c5924579da54e498ac5f279602a57c.jpg"][/img][/p][h2]Gods improvements.[/h2][p]The relationship with the gods has undergone two important changes based on the feedback you have been reporting: [/p][list][*][p]Regia and pontiffs: we have added a new building that allows you to automate the festivals of the gods. You can even prioritize the gods you need the most at any given moment. [/p][/*][*][p]Sacrifices can no longer be made at any time. You will only be able to make sacrifices when your faith level is very low. Thus we have put an end to the exploit of the pigs. [/p][/*][/list][p][img src="{STEAM_CLAN_IMAGE}/44838290/ae197c25d30aa032b17d0c2466079e5b2f374094.png"][/img] [/p][h2]Construction of wonders[/h2][p]We have added 3 new wonders that besides being huge and beautiful, will increase the desirability of your city. [img src="{STEAM_CLAN_IMAGE}/44838290/d344022c1b813a5c6022160437f324074b8eee69.png"][/img] [/p][h2]Simulation mode added for battle confrontations[/h2][p]Now you have the possibility to simulate each battle without the need to play it. As you add troops for the confrontation you will see a bar that will determine the probability of victory. [img src="{STEAM_CLAN_IMAGE}/44838290/f656bc7de676fbe6f65d18be800cbf5105650336.jpg"][/img][/p][h2]New achievements[/h2][list][*][p]A budding architect: Build your first wonder [/p][/*][*][p]Wonderful: Build all 3 wonders in the same game [/p][/*][*][p]Divine revelry: Get a pontiff to organize the festivals [/p][/*][*][p]Enlightenment and progress: Upgrade the technology level of your city to level 3 [/p][/*][*][p]Peace in the beyond: Give burial to 50 deceased [/p][/*][*][p]Unbreakable alliance: Get an excellent relationship with all cities on the map [/p][/*][/list][p][img src="{STEAM_CLAN_IMAGE}/44838290/73cc9b4fba17ca7d7b836a3dfd3b305f48260056.png"][/img][/p][h2]New languages[/h2][p]Polish and Catalan are added to English, Spanish, German, French, Japanese, Russian, Simplified Chinese, Brazilian Portuguese and Italian. [/p][h2]Quality of life improvements[/h2][list][*][p]New filter in the construction mode that shows you similar buildings. [/p][/*][*][p]With shift + click to assign workers. [/p][/*][/list][p][img src="{STEAM_CLAN_IMAGE}/44838290/3405fec50058939efa0951ce4411eb4ab335babf.jpg"][/img][/p][h2]Other improvements[/h2][list][*][p]We have adjusted how the different factors influencing the people's Favor were calculated, such as the unemployment rate or the crime rate, so that unfair situations do not occur for the player. [/p][/*][*][p]We have improved the revolts: now they are more visible, being able to see citizens with torches walking the streets and burning buildings. [/p][/*][*][p]We have added new Anti-aliasing options. [/p][/*][*][p]We have fixed some terrain chunks where the valid points to build were wrongly configured. [/p][/*][*][p]We have updated the tutorials with new explanations of everything included in the update. You can see all of them from the pause menu. [/p][/*][*][p]We have fixed a bug that caused that when rebuilding any previously destroyed warehouse it did not keep the filters it had applied. To see the changes affecting optimization take a look at [url="https://store.steampowered.com/news/app/2603020/view/830456433963173676"]devlog XVIII: AUREUS[/url]. [/p][/*][/list][p] So far, on top of this huge update, in the first six months of Citadelum we have published two additional DLCs: [dynamiclink href="https://store.steampowered.com/app/3358500/Citadelum_Campaign_II_The_Last_Conqueror_of_Britannia/"][/dynamiclink] [dynamiclink href="https://store.steampowered.com/app/3450060/Citadelum_Campaign_III_The_Lost_Eagles_of_Germania/"][/dynamiclink] Including new, more challenging missions and two new biomes: snow and swamps in new territories. And we are still working on further content for the game, that you will be able to enjoy very soon. [img src="{STEAM_CLAN_IMAGE}/44838290/ddc4420b584779da5cdbee8b6147efdbca4d932d.png"][/img][img src="{STEAM_CLAN_IMAGE}/44838290/ecf7955181e839b4b7ce3a962a1ec0fabe996fe8.png"][/img][img src="{STEAM_CLAN_IMAGE}/44838290/3d94344d181580df3f7b35707decf84cd255ca12.png"][/img][/p]

📄 Read the full patch notes on Steam →

✅ Mods Updated for This Patch (0)

These mods were updated after the patch — safe to use on the current version.

None yet.

⚠️ Mods That May Be Broken (0)

These native mods may not work until the author updates them. Everything else is unaffected — .esp, texture, and Papyrus-script mods are version-independent and survive patches.

None yet.

📋 Browse Citadelum Mods

↩️ How to Roll Back / Downgrade

Steam: open the Steam console (steam://nav/console) and run `download_depot <appid> <depotid> <manifestid>` to download the pre-update build, then copy those files over the updated ones. Set the game to "only update when I launch" (Properties → Updates). Always back up the game folder before a patch.

🕘 Previous Updates

Older Citadelum updates — click to read each patch note.