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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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So, the dev diary says that completing the reforms will allow you to westernize. Does that mean that these nations will be completely unable to westernize unless they jump through a (completely made up, highly convoluted, and slightly silly) series of hoops? I'm not sure I'm in favor of that.
its already ahistorical for westernization in this period to begin with for all but a few places, i dont see why its bad to actually make you work to reform your state religion that encouraged staying how you were
 
Are these aztec reformations and doom meter actually based on anything historic or just popculture? Did they ever really sacrifice their leaders?

I think in the case of the Aztecs its supposed to represent everything hitting the fan at the same time, (its not literally Angry Gods coming down with doom) multiple emperors dying, chaos, invading armies, disease, rebel vassals everywhere, yeah I think that counts as doom.

Historically, yeah you could argue that "doom" hit the Aztecs, and after loosing their emperor you got a o/o/o/ emperor with Cuitlahuac, and after he too dies of disease (and not presuing the Spaniards) you finally get Cuauhtemoc with good military stats but by then all your vassals are sieging your capital.

As for the question of whater they sacrificed their emperors, depending on your outlook on history, Moctezuma II was either killed by the Spaniards who didnt find him useful, or stoned by his own people after they got fed up of him collaborating with Cortez.
 
its already ahistorical for westernization in this period to begin with for all but a few places, i dont see why its bad to actually make you work to reform your state religion that encouraged staying how you were

I agree that westernizing in general ought to be harder, but I really don't see how tying it to religion helps anything (sure, all religions attempt to maintain the status quo, but I don't see why the Aztec religion should have done so more effectively than Shinto, Islam, or Siberian Paganism). My real problem, though, is that the "reformation cycle" the devs want the Aztecs to go through before westernization is both without any historical precedent and a form of unnecessary railroading. Why, to pick an example at random, should nations without vassals be completely incapable of westernizing (assuming westernizing is a thing)? I actually rather like the "reformation cycle" as an optional process to remove some of the downsides of the religion, but I don't think it should be tied to technology.
 
I like the new ToT mechanics, but there is one flaw in them (unless I'm missing something?) - the real ToT didn't allow the Spanish to colonise east of the ToT line, meaning that they weren't allowed to colonise in Africa and most of the far east, but the EU4 rules don't give penalties against later Catholic colonisers in Africa, as there are no CNs in Africa, UNLESS perhaps the ToT in Africa and the Far East is somehow triggered by the first Catholic nation with positive papal relations establishing a Trade Company or something in that TC region? Maybe it could prevent other Catholic colonisers from (or give them penalties for) creating a trade company in that region?
 
The real problem with the Treaty of Tordesaillas mechanics is simply this: Catholicism sucks in this game.

Protestant and Reformed are so much better. There is no good reason to stay Catholic, therefore making this whole system rather worthless. Paradox need to add in some real rewards for being devout Catholic, and better consequences for switching religion. As it is now, it's so easy to switch religion, and the only consequence is a very small relationship penalty. But since even the AI switches away from Catholicism, you always end up on the stronger religious side anyways when the Religious Leagues form up.

Perhaps instead of switching religions immediately, you should have to enable a "Disaster" which puts your country in a religious war for a few years, with lots of religious rebels on both sides (old religion, and religion you are attempting to switch to) and you have to fight alongside the religion you are attempting to establish. Some negative modifiers would include depleted manpower and deserters from your army (possibly even having whole armies/generals dissent to the "old religions" rebel faction).

The key point would then be that any other country can support their religions side in the conflict. Either simply by giving them a "support rebel" type casus belli, or add in some new diplomatic mechanics like "Send Mercenaries" to hire mercenaries which join the rebel armies, or double the effect of espionage actions while a country is in this disaster state.

I think this would make religion in general way more enjoyable. And would really represent the religious conflicts of a nation trying to break away from Catholicism.
 
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There is no good reason to stay Catholic,
"I am very large and have the Pope as a vassal. I laugh at other people's Legitimacy problems."
 
Given that you now can get a +10 colonist growth as Catholic, and inflict -20 on 3 of the most likely other colonizers if they try to poke their nose around in your territory, thats a pretty good bonus to being Catholic.
 
I think in the case of the Aztecs its supposed to represent everything hitting the fan at the same time, (its not literally Angry Gods coming down with doom) multiple emperors dying, chaos, invading armies, disease, rebel vassals everywhere, yeah I think that counts as doom.

Historically, yeah you could argue that "doom" hit the Aztecs, and after loosing their emperor you got a o/o/o/ emperor with Cuitlahuac, and after he too dies of disease (and not presuing the Spaniards) you finally get Cuauhtemoc with good military stats but by then all your vassals are sieging your capital.

As for the question of whater they sacrificed their emperors, depending on your outlook on history, Moctezuma II was either killed by the Spaniards who didnt find him useful, or stoned by his own people after they got fed up of him collaborating with Cortez.

I guess that makes sense but is it fitting for the whole of the game? There's several decades of the game at the start with no european contact. I imagine things were pretty different before.
 
Doom is an interesting idea. Good way to simulate Aztec Empire, rather than annex directly they will vassalize, as they did historically.

there are couple issues I am curious about:

Will doom be tied to religion, techgroup or government type? (should be religion AND techgroup, high techgroup would disable doom for religion that allows it. I don't think one country reforming its religion should disable doom for other countries)
Will Aztec get bonuses to compensate for doom mechanic, so their neighbours won't defeat them?
If Aztec reform, will it change their techgroup? (something like CK2 converter "high american" perhaps?)
Will it be possible to get out of Doom mechanic by converting to different religion? (would make sense, missionaries arriving and preaching catholic/protestant faith should be alternate way out)
Will expansion portray historical case of Aztec vassals like Tlaxcala throwing their lot in with the Spanish? If european power conquers Aztec, their vassals should become subjects of their colonial viceroyalty.

How will doom affect vassals? I assume they will not get doom points, regardless of their size, or will lose accumulated ones along with their overlord when he sacrifices people.
 
Will doom be tied to religion, techgroup or government type?
As noted in the thread: Doom is tied to being unreformed Nahuatl. When you complete the religious reform process, you get rid of the Doom meter (but you still keep the really quite remarkable bonuses you accumulated during the reform process, making post-reform Nahuatl one of the best religions in the game), and until you've reformed your religion you can't Westernize.
 
So I suppose the Andean nations will likely have a unique religion as well. Perhaps Africans, too?
 
Yes, yes, let's add an event to lower Native American province manpower by 80% when they meet Europeans. Permanently.
That sure sounds like fun! (It doesn't.)

Well, why not? Make a map that is absolutely packed with developed native states, and then have the apocalyptic plague cause them to begin to collapse. It would be like a two-stage game, one in which you'd have to first prepare for surviving the coming disaster, and then actually muddling through it.

People here always say they want harder games...
 
As noted in the thread: Doom is tied to being unreformed Nahuatl. When you complete the religious reform process, you get rid of the Doom meter (but you still keep the really quite remarkable bonuses you accumulated during the reform process, making post-reform Nahuatl one of the best religions in the game), and until you've reformed your religion you can't Westernize.
Not quite what I asked. And you ignored what I said in "()".
Will reformed religion be same religion, but with doom turned off, or it will be "Reformed Aztek" religion?
Latter means doom will be turned off by conversion, so you really would have two separate religions, Old Aztek, and Reformed Aztek, like in CK2.
Alternatively, you could have one religion, but doom being present could depend on more than one factor.
One, is reformation being global, you could have "disable_doom = yes" similar to "disable_papacy = yes" event command.
Second alternate solution, could be tying doom to religion AND techgroup. For country to have doom, it would need to simultaneously have Aztek religion, and "primitive" techgroup like mesoamerican which has techcost penalty of 150%. If country reforms, it would swap techgroup to "High American" which would have smaller, like 50% techcost penalty (and as not "primitive, would have doom disabled"), but keep religion, so there would be no need for separate reformed and unreformed religions.
However, there is no evidence to point to any as being the way they implemented it. I think they will go easiest way and use "disable_doom = yes"
 
Well, why not? Make a map that is absolutely packed with developed native states, and then have the apocalyptic plague cause them to begin to collapse. It would be like a two-stage game, one in which you'd have to first prepare for surviving the coming disaster, and then actually muddling through it.

People here always say they want harder games...
A thousand times yes. The emptiness of the New World always bothered me. Still on the EUV wishlist, I guess.
 
Not quite what I asked. And you ignored what I said in "()".
Will reformed religion be same religion, but with doom turned off, or it will be "Reformed Aztek" religion?
Latter means doom will be turned off by conversion, so you really would have two separate religions, Old Aztek, and Reformed Aztek, like in CK2.
Alternatively, you could have one religion, but doom being present could depend on more than one factor.
One, is reformation being global, you could have "disable_doom = yes" similar to "disable_papacy = yes" event command.
Second alternate solution, could be tying doom to religion AND techgroup. For country to have doom, it would need to simultaneously have Aztek religion, and "primitive" techgroup like mesoamerican which has techcost penalty of 150%. If country reforms, it would swap techgroup to "High American" which would have smaller, like 50% techcost penalty (and as not "primitive, would have doom disabled"), but keep religion, so there would be no need for separate reformed and unreformed religions.
However, there is no evidence to point to any as being the way they implemented it. I think they will go easiest way and use "disable_doom = yes"
There's no need to have 2 religions. When the Papacy is disabled you don't switch to a different Catholic religion. You stay the same religion, just without the papacy mechanics.
 
We'll have to see about the CB, but Spain's ideas could use a rethink if that's the case. Or either way, I guess.

i'm going to call it and say that idea is replaced with something to do with treasure fleets.