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Welcome to the very first development diary for El Dorado, the fourth major expansion for Europa Universalis 4. To kick things off, we’ll be talking about the new Nahuatl religion that El Dorado adds in Central America and also about how the expansion changes exploration and colonization.


Nahuatl
One of the centerpieces of the expansion is the new Nahuatl religion. A number of Central American states, most famously the Aztecs, believed that the world was destined to end and that only the strength of their Gods could prevent it from happening. For the Gods to have enough power to prevent Doomsday, they needed sacrifice - human sacrifice. The Aztecs would go to war to secure captives for these sacrificial rituals, all in the name of keeping the universe together.

In El Dorado, this is represented through a mechanic we call Doom. All Nahuatl states have a ticking Doom value that increases every year based on the number of provinces they own. High Doom increases technology costs and idea costs and should the value ever reach 100 the Nahuatl state will be forced into taking drastic measures to avert Doomsday. The ruling family will be sacrificed, killing your ruling monarch and heir and replacing them with a 0/0/0 ruler. In addition, all of your monarch power is lost and any and all subject states break away as the nation descends into chaos. As if that wasn’t enough, if the doomed state has gained any religious reforms, up to two of these will be lost (more on that below).

To avert Doomsday, Nahuatl states have a few options. The ‘Flower Wars’ Casus Belli gives them the ability to declare war on their neighbours freely while occupying provinces and winning battles will result in Doom being reduced as they secure captives to send to the Gods. If just warring with your neighbours isn’t sufficient, Nahuatl states can also sacrifice ruling monarchs and adult heirs in their vassal states. Doing so will reduce Doom by an amount equal to the total skills of that monarch or heir, but will anger all subject states and make them more likely to seek independence.

If you wish to get out of this cycle of war and sacrifice, you will need to reform your religion. Each of the three new religions (more on the other two in a later dev diary) has their own reform track, and their own unique requirements for passing a reform. Nahuatl states have five reforms they can pass, giving benefits such as colonists, war exhaustion reduction and more diplomatic relations. Enacting a reform requires having at least 5 vassal states, no rebels, positive stability and less than 50 Doom. When enacted, Doom will increases by 25 and all subject states will declare independence, forcing you to go to war to bring them back into the fold. Once you have passed all five reforms, the ‘Reform Religion’ button will be available as soon as you border a Western neighbour. This brings you up to 80% of that Western nation’s technology level and allows you to Westernize. It also permanently disables the Doom mechanic.
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Exploration
Exploring the New World can be very rewarding, but also a bit tedious, as you have to manually control your explorers and conquistadors while they seek out new land for you to colonize and conquer. In the El Dorado expansion we’ve added new systems for both land and sea exploration, but we’ll leave the land exploration for a later dev diary and instead talk about naval exploration.

Those with the El Dorado expansion will have an ‘Exploration Mission’ button in the unit panel that opens a list of possible missions that their explorers can undertake. These include exploring a sea, charting a coastline and even circumnavigating the globe. When you send a fleet on a mission to explore a sea or chart a coastline they will head towards that province and automatically uncover it, along with surrounding provinces, before returning to port. Charting coastlines can also result in a variety of events as your explorers make landfall and encounter the native population of other continents. Fleets on an exploration mission do not suffer from attrition but you will not be able to divert them from their course and you can’t send a fleet exploring unless it is in port. Furthermore, exploring can no longer be done with a single ship - you need at least 3 Light or Heavy Ships (or a mix of both) to be able to explore.

Nations that have Diplomatic Technology level 9 can follow in the footsteps of Magellan and attempt to circumnavigate the globe. Doing so will send your fleet on a trek from the Straits of Magellan to the Cape of Good Hope. The fleet will take attrition as normal on this mission, but if it makes it all the way around the globe without sinking, you will have successfully circumnavigated the globe. Being the first nation to circumnavigate the globe will give you 100 prestige, while other nations who do so later will gain 10 prestige for a successful attempt.

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Treaty of Tordesillas
Colonization of the Americas wasn’t a free-for-all. The Pope divided the world into Spanish and Portuguese influence spheres that determined who had the right to colonize a given part of the world. In the El Dorado expansion, Catholic nations will be able to gain a similar sanction for their colonization by being the first nation to create a colonial nation in a colonial region while having positive relations with the Papal States. The first nation to do so will be given a ‘Papal Grant’, which speeds up the growth of settlers for them by +10 in that colonial region and slows down the settler growth of all other Catholic nations there by -20. A Catholic nation that violates a Papal Grant also gets -50 relations with both the nation that has the grant and the Papal States.
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That's all for today, but there will be a dev diary every Thursday up until release, so stay tuned!

Europa Universalis IV: El Dorado - Expansion Announcement Teaser
[video=youtube;vYDn6JhHEuw]https://www.youtube.com/watch?v=vYDn6JhHEuw[/video]

Europa Universalis IV: El Dorado - Dev's Play 1
[video=youtube;kaq97WPCpiI]https://www.youtube.com/watch?v=kaq97WPCpiI[/video]
https://www.youtube.com/watch?v=kaq97WPCpiI

Europa Universalis IV: El Dorado - Dev's Play 2
[video=youtube;bK53EcmWp1o]https://www.youtube.com/watch?v=bK53EcmWp1o[/video]
https://www.youtube.com/watch?v=bK53EcmWp1o

Europa Universalis IV: El Dorado - Dev's Play 3
[video=youtube;Ftx_sbEJEF8]https://www.youtube.com/watch?v=Ftx_sbEJEF8[/video]
https://www.youtube.com/watch?v=Ftx_sbEJEF8

Europa Universalis IV: El Dorado - Dev's Play 4
[video=youtube;qAWOuwVTTQw]https://www.youtube.com/watch?v=qAWOuwVTTQw[/video]
https://www.youtube.com/watch?v=qAWOuwVTTQw

Europa Universalis IV: El Dorado - Dev's Play 5
[video=youtube;8a9rbt-9mho]https://www.youtube.com/watch?v=8a9rbt-9mho[/video]
https://www.youtube.com/watch?v=8a9rbt-9mho

Europa Universalis IV: El Dorado - Dev's Play 7
[video=youtube;83FrD4ZMfmg]https://www.youtube.com/watch?v=83FrD4ZMfmg[/video]
https://www.youtube.com/watch?v=83FrD4ZMfmg

Europa Universalis IV: El Dorado - Dev's Play 6
[video=youtube;DWHAEspX4W8]https://www.youtube.com/watch?v=DWHAEspX4W8[/video]
https://www.youtube.com/watch?v=DWHAEspX4W8[URL="https://www.youtube.com/watch?v=bK53EcmWp1o"][/URL]
 

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Authonomy? Sorties?
There is nice chance that AI would be able to handle it properly, but the concerns aren't unjustified.
True, but this is something that will literally lead to those regions not functioning (although I suppose the same could be said about autonomy, but I think the AI is just bad at it, not literally incapable of interacting with it).
 
- not sure i like this yet another "REFORMORDIE111" approach.

why shouldnt it be there?

its the same thing as ck2 and reforming the pagan religions, the cross and the moon are nire oersuassiuve than your disorganized pagan ass
 
why shouldnt it be there?

its the same thing as ck2 and reforming the pagan religions, the cross and the moon are nire oersuassiuve than your disorganized pagan ass

It's not even straight reform or die. You can play just fine as an unreformed Nahuatl nation, provided you have enough vassals to stave off Doom. It's more just "you have this odd gameplay, and you can get bonuses, keep your flavor, and get to keep your religion for reforming it!"

It's a lot better executed than horde 'reform or die' approach, that's for sure.
 
It's not even straight reform or die. You can play just fine as an unreformed Nahuatl nation, provided you have enough vassals to stave off Doom. It's more just "you have this odd gameplay, and you can get bonuses, keep your flavor, and get to keep your religion for reforming it!"

It's a lot better executed than horde 'reform or die' approach, that's for sure.
While I definitely think this is better than hordes (who should get and expansion sometime) I highly doubt you could survive the Europeans without reforming.
 
And so continues the game notion that contact with western countries is needed for 'reform'. So preposterous.

Yet, in case of Mesoamericans, too true. No guns, no steel, no germs :)
 
While I definitely think this is better than hordes (who should get and expansion sometime) I highly doubt you could survive the Europeans without reforming.

You apparently underestimate the power of boats.

Regardless, the point is that your incentive to reforming your religion is that you get bonuses, not that you don't get killed. Not losing all your flavor is a big plus, too.
 
Re-read the first post that the tick is yearly which isn't bad...
I thought its increase per month, but now that it is per year, I think Aztec can grow big enough before DOOM happen...

My question would be, now this expansion going to improve Nahuatl, Mayan, and Inti, is there any plan to improve Totemist religion?
Rather sad to see this religion still lack distinct flavor when its neighbor religions will get a lot this expansion...
 
I think the moral of the story here is that white people are magical and we need to obtain their powers for our gods by sacrificing them. Huitzilopochtli will be invincible once we've offered him up some Spanish soldiers and priests.

Regarding the Doom clock, is there going to be any implementation of the 52-year cycle?

That worked quite well. The Mexica thought the same thing after La Noche Triste, tried it, and smallpox swept through Tenochtitlan soon afterward. Such is the power of biohazardous religious practices.
 
You apparently underestimate the power of boats.
Indeed, due to how smaller the gap in naval is you can rule the seas given a bit of effort and planning. Or just enough money to throw at it really. Even bonus to ship durability, combat ability, three times morale and three designs ahead can be overcome by throwing a fleet six times the number though admittedly they still wiped out a third of my fleet which is by far the highest losses I have ever seen a winner take in a naval battle.

Well at least for those that all the ships fought from near the beginning, have seen some pretty high losses on both sides for battles where fleets kept joining and changing who is winning just before the stackwipe finishes.
 
Re-read the first post that the tick is yearly which isn't bad...
I thought its increase per month, but now that it is per year, I think Aztec can grow big enough before DOOM happen...

My question would be, now this expansion going to improve Nahuatl, Mayan, and Inti, is there any plan to improve Totemist religion?
Rather sad to see this religion still lack distinct flavor when its neighbor religions will get a lot this expansion...
It seems like the tick improves by +1 per province owned. As the Aztecs, there's definitely a limit to how much you could grow without reforming. By the time you get 50, 60 provinces, you'd probably have to be constantly at war, and constantly crushing your enemies. Not likely considering you can't westernize.
 
So Wiz, will we be able to pass those Nahuatl reforms in random order, similar to CoP North American tribes ideas or will they be passed in order displayed on the screen?
 
Yet, in case of Mesoamericans, too true. No guns, no steel, no germs :)

Please don't mention that horrendous high-school revisionist propaganda.
 
Please don't mention that horrendous high-school revisionist propaganda.

While the book, per se, is quite simplistic and shouldn't be quoted as truth, in THIS specific case contact with the Eurasians would have been needed, indeed - while they could have filled the gap on their own, it would have taken quite a bit more than EU4 covers. The Americas were peeking in the Bronze Age, as far as military technology goes, just when the Spanish arrived; getting to early steel without any Eurasian hint would have required at the very least another millennium (which is being very generous to the Americas - in Eurasia, two millennia were needed). Now, the question is: shouldn't they be able to modernize out of any Afroeurasian contact? Pretty much, yeah.
 
That's why this mechanic is so silly. Because if IRL the Aztecs didn't do enough blood sacrifice, maybe some peasants would be pissed at the ruler and think he's bad, but otherwise nothing would happen! It's not like the Nahuatl gods are real.

They might as well introduce an event for Christian nations where Jesus swoops in and establishes the Millennial Kingdom. That's about how historical this thing is.

The problem there is that the player outside of the game knows the gods aren't real so you'd have no compunction to engage in flower wars and sacrifice your vassals if there was no consequence. While the doom penalties are certainly extremely harsh, it's necessary to ensure that players behave in such a way that recreates the divisions and troubles that faced the Mesoamerican world.

The reformation bonuses make it seem worth it, however. Nahuatl could easily be one of the strongest religions in the game and the prospect of colonizing Europe with your bloodthirsty hordes sounds awesome. Just rename the religion to Teotl please - naming it 'Nahuatl' is like naming Catholicism 'Latin' and Islam 'Arabic.'