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Europa Universalis IV: the best EU4 mods

With over four thousand EU4 mods - the top one hundred of which having anywhere between 10K - 300K subscribers - trying to tweak your game can seem like an intimidating experience. Thankfully, it's hard to go wrong with the quality of the modding community for Europa Universalis IV. They've somehow managed to make an already replayable game even more replayable, if you can imagine that.


So instead of gawking at the sheer quantity and quality of mods, let's look at how easy it is to enhance the vanilla game across four key categories to get any megalomaniac started on a fuller EU4 modding experience.


In days gone by you'd have had to grab mods directly from the Paradox forums and get into the weeds of placing files here and there. Thankfully for EU4 getting mods has become as easy as shopping on Amazon Prime thanks to the Steam Workshop integration. You might find some mods still host themselves separately but all of the popular ones at least will automatically be downloaded onto the launcher once you subscribe.


Read the rest of the story...


RELATED LINKS:

Europa Universalis IV DLC Guide

Europa Universalis 4: Emperor arrives today - here's what it adds

Paradox launches a new studio to develop "new games in the grand strategy genre"


Dev Diary: Paradox Tinto

Click here to read on the Forums

Hello everyone and welcome to another development diary for Europa Universalis IV. I’m not sure how many times I’ve written these exact words in the last 8 years, but this time it is a special one. It may not be to announce an unprecedented new feature, or to tell you guys that having two consuls in rome is a stupid idea, or anything like that..

Today I’m here to introduce the new team for Europa Universalis IV. This summer we started up and recruited for a new studio based in Barcelona to take care of the game. While Starnan and Neondt having left the team this summer, Groogy is still part of the EU team, working as game designer and programmer with us.

So Paradox Tinto, who are we?
Johan Andersson
I suspect most of you know me by now, but for those who don’t. I’ve been here since 1998 and was one of the founders of Paradox, and ran PDS as Studio Manager for 15 years, and have spent the last 5 years as a creative director there. Now I am here starting up a new studio in a new country, and this is something I’m super-excited about.
Sonia Linares
Hola! I am Sonia Linares, Studio Operations Manager at Paradox Tinto.
I started my career within the Video Games Industry over 11 years ago in Madrid. During all these years, I have worked with a multitude of AAA games and a wide range of development Studios across the globe. I also have been lucky enough to be part of different departments & functions like Publishing Operations, Product Launch, Central Development Services -Age Ratings, Localization, Certification and First Party Submissions- .
I am sure that running Paradox Tinto (Barcelona) with Johan Andersson will be one of the most challenging, enlightening and fun jobs I have ever had!
Other than that I like sports, traveling and I love sweets.
Alexander Ivannikov
Hi, I'm Alexivan. I've been working at PDS for the last 7 years on pretty much all of our projects and my current favourite PDS game is EU4. I feel very lucky and happy to be joining the Tinto team as the new Tech Lead and once again work on EU4.
In my spare time I play a lot of games and watch tons of anime, tv series, and movies. Some of my favourite games outside PDS are factorio, GTA5 MP, Terraria. When it comes to TV I would definitely recommend Watchmen, I love both the movie and the tv series. My anime recommendation for you guys would be Gintama. Leave a comment if you have suggestions on new things for me to check out.
David Horler
Hello, my name is David Horler, and I am the Art Lead at Tinto.
I began at Paradox South way back in 2013, where I worked on 3D art for Crusader Kings II and Europa Universalis IV.
For the last 3 years I've been at Paradox Development Studio, where I started off painting the Imperator: Rome world map. Most recently I was the technical artist on Crusader Kings III, where I got to work a little bit on almost everything artsy, like the environments, to the coats of arms, and the portraits, as well as lots of slightly less artsy behind-the-scenes stuff with our excellent Engine and Tools teams.
I'm a strategy gamer and really into history, so I'm very excited to help set up a new team of GSG-focused artists where we can put into practice everything we've learnt over the last few years.
Verónica Pazos
Hey! I'm Verónica, content designer at Paradox Tinto. I joined the team just a month ago, so my work has mainly consisted of getting to know the workflow and writing lots of flavor text. From now on, I'll be taking part in the design team and I'm really excited about creating a new heresy (and hopefully more content for your favorite countries). I like writing, History and games, so I kind of run out of hobbies coming here.
Jordi Santiago
Hi, I'm Jordi Santiago, gameplay programmer at Paradox Tinto. Me and some of my fellow workers here in Tinto have just joined Paradox, so I'm still getting familiar with code and stuff. Hopefully, I will be soon making your favorite games just a little better.
Adrián González
Hi! I'm Adrián and I've just arrived at Paradox Tinto. I'm a software engineer who will be working as a Gameplay programmer (or whatever is related to code!). Our team has just started and I'm very excited to see what we can build together. If I'm not playing and learning about EUIV, you can find me at Hallownest, Toussaint, or Caed Nua :)

Next week we are getting another content designer, and by the end of October another programmer. We are also recruiting UI & Concept Artists, and an UX Designer!

Building a new team is something that takes time. A programmer, even if he is very skilled with a lot of experience, takes a fair bit of time to learn a codebase, until that person is able to create new features. The same is for designers or artists, as it takes time to understand philosophies and processes. However, we have already working on new things together, and today we’ll show you the first things!

For a long time we have had one of the idea groups you can pick from switch depending on if you are a republic or not. Republics would get plutocracy and the others Aristocracy. Now in the next big update, we’ll have 3 new idea groups that can become available depending on what type of country you play.

Horde Government Ideas
horde_gov_ideas = {
category = MIL

bonus = {
cavalry_power = 0.25
}

trigger = {
has_reform = steppe_horde
}

horse_lords = {
cavalry_cost = -0.33
}
beyond_the_sun = {
ae_impact = -0.1
}
mandate_of_the_khan = {
religious_unity = 0.25
}
there_shall_be_no_grass = {
land_attrition = -0.2
}
horde_loyalty = {
global_unrest = -1
}
watchers_of_the_silk_road = {
caravan_power = 0.20
}
a_magnanimous_empire = {
num_accepted_cultures = 2
}

ai_will_do = {
factor = 20
}
}
Divine Ideas
theocracy_gov_ideas = {
category = MIL

bonus = {
global_heretic_missionary_strength = 0.01
church_loyalty_modifier = 0.1
brahmins_hindu_loyalty_modifier = 0.1
brahmins_muslim_loyalty_modifier = 0.1
}

trigger = {
government = theocracy
}
servants_of_god = {
devotion = 1
}
by_the_grace_of_god = {
fire_damage_received = -0.1
}
friends_in_high_places = {
leader_cost = -0.2
}
flesh_is_weak = {
land_morale = 0.1
}
alpha_and_omega = {
enforce_religion_cost = -0.1
culture_conversion_cost = -0.1
}
conviction_of_sin = {
global_unrest = -2
}
martyrs = {
global_manpower_modifier = 0.15
}
ai_will_do = {
factor = 0.9
modifier = {
factor = 0
has_idea_group = humanist_ideas
}
}
}
Indigenous Ideas
indigenous_ideas = {
category = MIL

bonus = {
global_institution_spread = 0.25
}

trigger = {
has_government_attribute = enables_natives_idea_group
}

indigenous_bountiful_land = {
tribal_development_growth = 0.05
development_cost = -0.05
}
indigenous_irregular_warfare = {
hostile_attrition = 1
}
indigenous_constitution = {
reform_progress_growth = 0.25
}
indigenous_braves = {
land_morale = 0.10
}
indigenous_controlled_burns = {
global_manpower_modifier = 0.2
}
indigenous_trade_with_foreigners = {
idea_cost = -0.1
}
indigenous_treaties = {
province_warscore_cost = -0.2
}

ai_will_do = {
factor = 1.0
}
}

When it comes to policies, these idea groups will be considered as aristocracy. Next week I’m back to talk a lot about some important balance changes we have been doing, with galleys, marines and other important things.

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Dev Diary: Federations & The New World

Click here to read on the Forums

Hey everyone! Today is the last day of us talking about the native americans and the rework they are getting. We’ll be talking about the changes to the Federations and the new world setup. As you’ll see on the pictures for the map, a lot of tags have been split up in order to represent federations properly. A prime example is the Iroquois who will now be several tags and start in a federation at game start.

So let’s start with how to form them. Since we are splitting up the federal tags like the Huron and Iroquois I still wanted to retain some kind of identity for them. As such when you invite the first member to form a federation with you, you get the opportunity to also name the Federation. There are some default options scripted that can be based on Tags and Cultures which it will suggest for you, but you can of course just write whatever you want here.

We’ve also redone how leadership of the federation is decided. It is no longer decided on the death of the monarch of the leader in the tribe, instead we measure a cohesion value of the Federation. This value changes each month depending on the composition of the Federation but also some external factors. Keep in mind that any numbers & values are work in progress!

If cohesion hits 0% then it will trigger a change in leadership. In order to keep the cohesion high you want to keep similar cultures within your federation, however having one or two of a separate culture group won’t really be problematic. Another source of loss of cohesion is also if there are members that are stronger than the leader. For later in the game to help you keep a large federation together, if you have any colonizers on your border it will help you keep it together by having an external threat increasing your cohesion.

If a leadership change is triggered it will try to pick the strongest member to be the new leader, if the leader is the strongest then the federation will be disbanded. This entire process is 100% done in script, from calculation of members strength to what happens during leadership change. Currently for testing the strength is calculated from the max manpower of members and is done as a scripted function with an effect and looks like this:
Code:
calculate_federation_member_strength = {
effect = {
export_to_variable = { which = our_manpower value = max_manpower who = THIS }
set_variable = { which = federation_strength which = our_manpower }

}
}

Here’s the current list of values that affect your cohesion
  • -1 For every member not of leaders culture group
  • +1 For every member of leaders culture group
  • -1 For every member stronger than the leader
  • +1 for neighboring hostile Europeans

The aim here is to make Federations more something you can count on, instead of having to try and keep your prestige high or stack diplomatic reputation at all times just in case your leader at some random point dies, you can now count on it instead and try to plan around what you need to do in order to keep the leadership position.


Now I’m going to hand it over to a member of our beta program. @Evie HJ who have done the excellent work of reforming North America’s setup making it a much more vibrant and interesting place.

It's a whole (new) New World we live in

The setup for North America hasn’t really changed much at all since the release of Art of War, almost ix years ago – and, as far as the list of playable countries is concerned, since Conquest of Paradise even earlier. The new changes to the Native game mechanics in this patch provided a perfect opportunity to take a new look at a region that has remained largely untouched for a long time.

In some ways, this overhaul is our most ambitious review of the North American setup to date. The province count does fall short of Art of War (though fifty-three new provinces, not counting wastelands, is nothing to sneeze at), but the list of new tags is more than we ever added to North America at any single time. In fact, with fifty-six new tags, we’re adding more North American tags in this one overhaul than we have in the entire history of the Europa Universalis franchise.

Those tags are not evenly spread out across the continent. Two regions (the South-East United States and the Great Lakes and Saint Lawrence) get the lion’s share of the tags. Others like the Great Plains or Hudson Bay, get a handful of provinces or tags. The West Coast, for its part, where we know almost nothing of Indigenous people before the last century or so of the game, was entirely outside the scope of this overhaul. This applies to the provinces as well as the tags: in broad terms, we tried to add provinces in the same general region we were adding tags, to keep the amount of empty (or tribal land) provinces roughly similar.

With twenty-one new tags, it is the South-East United States that receive the most work in this new overhaul. The reason is simple: up until now, the 1444 setup in the game represented the historical situation around 1600-1650. The first 150 years of the game – a time when the last great cities of the Mississippian civilizations flourished in the region (the more northern city, like Cahokia, were likely abandoned by 1444)– were left out entirely. This was the first thing we set out to fix, and the new setup, as a result, emphasize the situation that early European explorers and archaeologists tell us about – not English colonists two centuries later. By and large, most of those new tags are settled nations, and (except the Cherokee) all belong to the Muskogean culture group. This is a compromise for some of them: while they spoke Siouan languages like Catawba, they were heavily influenced by the Southern Appalachian Mississippian culture, and it’s those cultural ties we chose to emphasize.

In the new setup, the Creek Confederacy is no longer available at game start, and the Cherokee are reduced to a one-province statelet in the mountains. In their stead, the Coosa Paramount Chiefdom is now the major power of the region. Though a one-province nation in itself, it rules through a network of subject states (Satapo, an area stretching from the Kentucky border to Alabama along the spine of the Appalachians. Surrounding it are a number of smaller, independent chiefdoms, including both sites visited by the De Soto expedition (Altamaha, Cofitachequi, Joara, Ichisi, Chisca, as well as Atahachi, the future home of Chief Tuscaloosa) and of Muskogean towns that would eventually form the seeds of the future Creek Confederacy, like Coweta and Kasihta. Further west, in the valleys of the Mississippi, they are joined not only by more of the chiefdoms documented by De Soto, (Quizquiz, Anilco, Pacaha and Casqui, the last three corresponding to the Menard-Hodges, Nodena and Parkin Mound archaeological sites), but also by the Natchez people, who would, in later century, become the last tribe to embrace Mississippian culture.

Further north, our other focus region was the Great Lakes of North America. Here, the main concern was nothing to do with our setup representing the wrong date (except along the Saint Lawrence, where the Iroquoians of the sixteenth century were mysteriously missing), and everything to do with the fact that the two most famous (con)federations of natives, the Hurons and Iroquois, were represented as monolithic nations with no use for the in-game Federation mechanism. Once it was decided to represent each of the nations making up those two confederations independently, adding in the other relevant nations in the region was an obvious choice. As with the United States South-East, these are largely settled nations of Iroquoian cultures, although a handful of them are migratory instead.

This gives us a sizeable five new nations where the one Iroquois tag used to be: Mohawk, Oneida, Onondaga, Cayuga and Seneca (plus, starting much further south at game start but not forgotten, the Tuscarora). Opposing them are the less well-known member nations of the Huron Confederacy: Tahontaenrat, Arendaronon, Attignawantan and Attigneenongnahac. In addition to them, we have a selection of minor Iroquoian nations that can struggle to strike the right balance to remain neutral between these two powerful Confederacies. This notably include the aptly named Neutral Nation (Attiwandaron), as well as the Tionontate (or Tobacco Indians), the Wenro of far western New York, and the Erie of Northwest Pennsylvania (plus the already existing Susquehannock). As the last two (Erie, Susquehannock) represent nations that claimed large territory but with very little united government, they are represented as migratory nations. You can think of the migration as representing shifting balance of power among the different villages and groups of their respective nations, rather than actual physical relocation. Also represented as migratory are the first two Iroquoian nations ever encountered by European: Stadacona, on the site of present day Quebec City, and Osheaga (Hochelaga), in present Montreal. In their case, leaving them migratory was the simplest way to enable them to potentially vanish from the Saint Lawrence lowlands, as they did in the late sixteenth century.

Our changes didn’t stop at those new areas, though they received the bulk of the changes. Existing tags that represented larger confederations or culture group were split into (some of) their constituent parts: the Illinois are now represented by the Kaskaskia, Cahokia and Peoria, the Shawnee by Chalahgawtha, Kispoko and Hathawekela, and the Puebloan people expanded from Keres and Pueblo to Acoma, Zia, Ohkay Owingeh and Sandiat. In a similar vein, some particularly large groups that used to be represented by a single tag now have additional tags to represent them: this is the case of the Cree, with the addition of the Nehiyaw (Plains Cree) nation, the Ojibwe, who are now additionally represented by the Mississage for their easternmost group and the Nakawe (or Saulteaux) for their western bands, and the Sioux, now expanded to include the Wichiyena (Western Dakota) and Lakota nations. Historical confederations that were lacking some of their members or needing a boost also gained it: the Iron Confederacy gained the Nehiyaw and Nakawe, described above; the Three Fires now add the Mississage to their alliance, and the Wabanaki Confederacy of North-East North America can now count on the help of the Maliseet and Penobscot as well as the pre-existing Abenaki. Finally, three more tags are added on sheer account of their historical importance in the Colonial era, two as allies of New France, one as ally-turned-enemy of New England: the Algonquin of the Ottawa valley, the Innu of the Gulf of Saint Lawrence, and the Wampanoag of Massachusetts Bay.

Along with all these changes, we finally introduced Wasteland mountain ranges to North America. Not in the Rockies (where the handful of connections already represent major passes through the mountains), but rather, in the East, along the Appalachian mountains. While they may not seem like much today, they were formidable obstacle to westward expansion in colonial time, when it was said that there were only five paths from the East Coast westward that could be taken by large groups of people: around the mountains to the south in the Piedmont of Georgia, through the Cumberland gap on the border of Virginia and Tennessee, through the Cumberland Narrows of western Maryland, the Allegheny gaps of Pennsylvania, and finally through the valley of the Mohawk river, in New York. In addition, through it didn’t allow for east-west travel per se, the Great Valley of the Appalachians was another significant route through the region, running from Alabama to Pennsylvania. All of them are now represented in the game, along with the mountains that bordered them.

We also tried to adopt a somewhat consistent standard in the naming of provinces, and revise province names accordingly. The new standard prefers the self-given names of a Native group (tribe, nation, band…) who lived in the region where we can find one. If none can be found, other options include a name given to a local people by a neighboring tribe (provided it’s not derogatory), or a geographic name in a local Native language. In all cases, we now tend to favor native spelling where we are able to find it, though symbols that are particularly unusual in the standard Latin Alphabet may be set aside or approximated for our players’ benefit.

That’s it for today, as usual I’ll answer questions in the thread however there’s one I want to address yet again as it keeps getting asked and I can’t answer every single time it gets asked. People have asked if these features will be applied to South America or the Siberian Natives etc. It all depends on time, the main focus is to rework the North Americans and if I have time I will make sure it plays nice with others that can also benefit but it is not a priority. Next week will have it’s development diary written by Johan.

Dev Diary: North American Government Reforms

Click here to read on the Forums

Hey everyone! Today we’ll continue on the native americans that we talked about last week. Last week we covered the migratory mechanics and how they will change. Of course though several nations in North America won’t be migratory and the ones who are can settle down.

I covered a bit that government reforms will be how native americans reform between their different stages. In total there will be 5 categories, which might not sound like a lot but natives will gain at start reform progress quite slowly and the point is for them to reach the end quite quickly by building up. So let’s cover the different government reforms that will be available.

The first two categories of government reforms have some modifiers to them, however there are some unusual ones here. In the first tier under the Chiefdom reform you have the Tribal Development Growth modifier. This modifier increases how much of tribal development you gain each month, regardless if you are migratory or settled. We’ll get to how that’s used for settled tribes. The other interesting modifier is the Oral Tradition reform in the second tier which gives you more reform progress growth, a quite helpful one if you intend to go all the way down to the last reforms.

After those two levels of reforms you will be presented with the option to settle down (if you are migratory). This will enable you to take direct control of the tribal land to grow in and build up your tribe.

Once settled you get the option to modernize through a European sponsor. Just like before you will adopt the sponsor's government type and it will make you adopt the institutions that the Europeans have. However if you don’t want to do that you have another option. If you wait just another level of reform you can pick what you want yourself.

Now if you have somehow stayed migratory the entire way to the end here, you get a special choice to become nomads of the great plains, essentially adopting the lifestyle of the Commanche after European contact.

Here’s a list of all the reforms. Keep in mind things are not final and values given here might change!

Base Reform
  • 0.1 Monthly Reform Progress Growth
  • -25% Land Maintenance Modifier
  • -1 Diplomatic Upkeep
  • -50% Institution Spread
Tier 1
  • Chiefdom Reform: 0.05 Tribal Development Growth
  • Federation Reform: 20% Manpower Modifier
  • Clan Council Reform: -33% Stability Cost modifier
Tier 2
  • Martial Tradition Reform: 10% Infantry Combat Ability
  • Oral Tradition Reform: 10% Reform Progress Growth
Tier 3
  • War Band Reform: 15% Land Forcelimit
  • Settle Down Reform: Stops being migratory
Tier 4
  • Codified Power Reform: -2 National Unrest
  • Trading with Foreigners Reform: Will reform off a European
Tier 5
  • Become Monarchy
  • Become Republic
  • Become Theocracy
  • Become Horde

Next up I want to cover buildings. You can build these already as migratory and they’ll move with you as you migrate, but their main use will be by settled tribes that will have more buildings to build. Mainly it’s the old buildings redone and rebalanced a bit but you’ll see some interesting effects to some of these, letting you build up your reform progress gain and tribal development gain as well. Just as with reforms these values are very much work in progress.

Unique Buildings - 200 ducats
  • Fortified House: 10 Land Forcelimit
  • Cermonial Pit: -50% Advisor Cost & +0.2 Reform Progress
  • Sweat Lodge: 1 Diplomatic Reputation
Expensive Buildings - 200 Ducats
  • Palisade: 1 Fort Level
  • Irrigation: 0.05 Tribal Development Growth
Normal Buildings - 100 Ducats
  • Earthwork: 25% Defensiveness
  • Storehouse: 50% Production Efficiency
  • Longhouse: 0.1 Reform Progress Gain
  • Great Trail: 50% Manpower Modifier
  • Three Sisters Field: 50% Trade Goods modifier

Now you’ve seen how you become a settled tribe, so let’s talk about what you do once you’ve become one. As settled you no longer get tribal development from being migratory, i.e you no longer cause devastation and passively gain tribal development. You instead need to build irrigation in provinces held directly by you to grow your tribe. Though you don’t migrate anymore, this development still resides in your capital.

That is until you decide to settle it into one of the provinces that is considered your tribal land. This will make the land directly owned by you and up to 10 developments will be moved there. This action costs 50 diplomatic monarch points. You can also decide to settle some development into an already settled province if you so want to, same mechanics apply.

Once a province is settled the Europeans can’t just simply colonise it anymore as they could with tribal land and the only way for you to lose control of that now is through a war.

It’s through settling your tribal land, subjugating other tribes while warding off the Europeans that you will grow your nation. All the while dealing with this you invest your resources to develop these provinces so that you can eventually reform and create a nation in the image you want.

I hope you enjoyed the dev diary today. Next one we’ll be covering new federation mechanics & the setup of North America. Cya then!