Crusader Kings Iii — After Strategy

CK3 By God Alone: Spiritual Fulfillment and the Christian Church Situation reach every playthrough

Tue, 29 Sep 2026 00:00:00 GMT

By God Alone is more than a “play the Pope” mode

Crusader Kings III received By God Alone on 30 September 2026, alongside the free 1.20.0 “Crozier” update. The expansion costs 19.99 EUR (USD 19.99 or GBP 16.99 depending on region) on its own, or comes as part of the Chapter V pass. Paradox’s launch messaging leads with playable theocracies: archbishops, patriarchs and the Pope. That is the obvious hook, but it hides what matters most to the majority of players.

This article reads the official launch changelog and the expansion’s Dev Diaries to answer a simple question. What changes in an ordinary Christian playthrough, without playing the clergy? The text relies on the publisher’s documentation, not on a played campaign: every mechanic cited comes from an official source.

Free or paid: how 1.20 is split

The first point to clear up, because it affects the purchase decision. The 1.20.0 changelog separates an “Expansion Features (Paid)” section from a “Free Features” section. The free part holds Rites: every faith branch or school becomes a Rite, with its own Divergence and head. It also holds the reworked excommunication, Monastic and Military Orders, Eminent Holy Sites, and Personal Tenets with Spiritual Fulfillment.

The paid part covers the Situation of the Church, playable theocracies, the College of Cardinals, Puppets, Ecumenical Councils, the Grand Cathedral and the tracked Great Schism. Paradox’s press release, however, lists Spiritual Fulfillment among the expansion’s features. The detailed changelog is the reference for the exact scope, but the gap deserves a check on Steam before buying.

Spiritual Fulfillment: a gauge for every character

Dev Diary #1 presents Spiritual Fulfillment as a new character metric running from -100 to +100. It compares the life the character leads with the life their faith asks for. Living up to a virtue raises it, acting on a sin lowers it, with a weight specific to each virtue and sin.

For Christian characters, the gauge breaks into seven named tiers. At the very bottom, the “Doomed” tier (-95 and below) raises stress gain sharply but also lifts some brakes: murder schemes no longer generate stress. The frame is set: being a good ruler and being a good believer no longer always go together.

The changelog adds 26 new Tenets, among them Transubstantiation, Simony, Purgatory, Confession and Miles Christi. A character can adopt beliefs of their own, separate from their faith’s Core Tenets. A Tenet prohibited by the faith creates a secret. Decisions such as “Take Confession” or “Receive Last Rites” restore Fulfillment. The new Tenets stay limited to Christians, but Personal Tenets exist for every religion.

The Christian Church Situation: a moving calendar

The core of the expansion is the Christian Church Situation. Dev Diary #4 describes this system as a system tracking the spiritual health of Christendom across seven Chapters. Every Christian ruler of County tier or above takes part, sorted into one of six groups depending on whether they are clerical or secular, main power, secondary power or heretic.

The seven Chapters are Fragile Unity, Saeculum Obscurum, Conversion, Reform, Investiture Controversy, Crusade and Concord. Each belongs to a type (Stability, Zeal, Instability or Crisis) and applies different modifiers by group. Catalysts push the Situation forward: clerical marriage, simony, murdered prelates, holy wars, antipopes, councils or Grand Cathedral contributions. A Chapter takes over once it reaches 1,000 points.

In practice, the player is not a passive spectator. The “Guide the Christian Church” decision, available every ten years, triggers a Catalyst of your choice. For a Head of Faith the effect is four times larger. It runs for the whole game once the expansion is owned, Dev Diary #7 specifies.

The Investiture Controversy: who appoints your bishops

The Investiture Controversy is one of the seven Chapters, detailed in Dev Diary #5. Christian religions start with the Conditional appointment doctrine: neither the ruler nor the clergy need permission to appoint a cleric in their jurisdiction, and either side can react immediately.

Replacing a court chaplain is cheap. Replacing the holder of a clerical title is much costlier: the “Meddling in Clerical Appointments” modifier applies, and the whole clergy likes you less for a decade. These moves feed the Situation up to the Chapter’s threshold.

When the Controversy begins, a 30-year countdown opens. It ends with the Investiture Council, a special ecumenical assembly. The clergy vote between the “Spiritual, Revocable” and “Temporal, Revocable” doctrines. By default, the clerical vote goes to the spiritual side. The secular player can tip it through puppets, through the Investiture Conflict casus belli or by paying Piety for sway attempts. If the temporal side wins, the Situation returns to Fragile Unity; otherwise it moves to Reform.

Puppets, theocracies and the College of Cardinals

The Puppets system gives the secular player a lever over the clergy. A Puppet is a real character who acts in your place, as Dev Diary #3 explains. The changelog lists three types: the court chaplain, a cleric from outside the realm and a coerced secular ruler. Costs and refusals fall on the Puppet, not on you.

Available actions cover excommunication, holy sites, faith creation, cardinal appointments, conversions, wars, alliances and marriages. A concrete example appears in Dev Diary #7: place a kinsman as chaplain, request a cardinalate for him, then spend Piety to raise his Papabile score.

On the theocracy side, Theocratic and Ecclesiastical rulers become playable, with their own government, succession and a Church Treasury. The College holds up to 70 cardinals. Papal Bulls can permit or forbid a Tenet for the whole faith, declare a Rite heretical or proclaim the Age of Crusades.

The Great Schism, now tracked and playable

According to Dev Diary #7, the Great Schism is not a Chapter but a second progress track on the same Situation. It advances through Ecumenical Councils, crossings between Rites, excommunications and conversions in Holy Site Counties. The changelog states that progress never decreases.

Three decisions exist, all tied to the Saeculum Obscurum Chapter and a threshold: cause the Schism, prevent it, or mend it through diplomacy. A Crisis Chapter only triggers it if the threshold has been met. Once the Schism has occurred, Chalcedonianism cannot return as a unified faith, and mending it goes either through conquest, which requires holding the five old Patriarchal Sees, or through diplomacy.

After launch: four patches in three weeks

Paradox has shipped a series of fixes. Update 1.20.0.3 (1 October) repairs, among other things, a block on elective titles and a crash in the Fourth Crusade story. Update 1.20.0.4 (6 October) fixes an artifact interaction. Update 1.20.1 on 13 October is a genuine balance patch. The cost of “Canonize a Saint” rises from 2,000 to 3,000 Piety, the Scholar lifestyle XP bonus is halved, and Council debates gain an AI opponent.

Update 1.20.1.2 on 21 October is a small bug fix, compatible with 1.20 saves and mods. The logical next step is gradual balancing. The risk for anyone buying now is meeting costs that are still being adjusted from one patch to the next.

Which player is it for

On paper, the content is massive. For a player of Christian dynasties, the value rests on three things. The Situation gives the Church’s history a rhythm. The Investiture Controversy makes appointments contested. Puppets give the secular ruler a lever no other expansion offered.

For anyone who mostly plays outside Christendom, the direct contribution is small: the Situation and the College only concern Christianity. Rites and Personal Tenets, for their part, arrive through the free update. The risk remains: an expansion this dense takes time to learn, and Council debates already received an AI opponent in 1.20.1.

Going further

CK3 By God Alone: The Investiture Controversy Decides Who Controls Your Bishops

Thu, 10 Sep 2026 00:00:00 GMT

Dev Diary #5 for By God Alone, published on 25 August 2026, turns a historical conflict into rules: the struggle between kings and the Church over who appoints bishops. The Investiture Controversy is not a scripted event. It is one of the seven chapters of the new Christian Church Situation, and it plays out over 30 years of manoeuvring, then a vote.

Update of 26 October 2026: By God Alone released on 30 September with patch 1.20.0 “Crozier”, at 19.99 EUR on Steam (Windows, macOS, Linux) or inside the Chapter V pack. The release changelog confirms the seven chapters, the Investiture Council activity and the pledge decision, renamed Bend the Knee. It does not name the Conditional appointment doctrine or the Investiture Conflict casus belli, so check them in game. According to Dev Diary #7 of 22 September, the Situation can also move between chapters fairly freely, which softens the “no other chapter” rule described below.

A “conditional” appointment doctrine

When a game starts, every Christian faith adopts a new doctrine: Conditional clerical appointment. Neither secular rulers nor the clergy need permission to appoint clergymen within their jurisdictions. Either side can also act on a disagreement immediately.

The difference from the existing doctrines is sharp. The secular ruler and the clergy can make these changes at the same time, which Paradox ties to the chaotic atmosphere of an era when clergy appointment had no fixed rulebook and everyone pushed their own pieces between 867 and 1453. Under a Spiritual appointment doctrine, these appointments go through other interactions instead.

In practice, a secular ruler can directly appoint a new court chaplain or the archbishop of the clerical region covering the realm. No petition is needed. It is a real gain in power, but it has a price.

Replacing a chaplain does not cost what replacing an archbishop costs

Changing your court chaplain works as it already does under today’s Temporal doctrines: a button on the council member, then a pick from the list. The outgoing chaplain likes you less, and the move triggers catalysts that push the Situation toward the Investiture Controversy and Saeculum Obscurum chapters.

Replacing a clerical title holder weighs far more. You receive the “Meddling in Clerical Appointments” modifier and a larger opinion penalty with the replaced archbishop. Above all, every clergy member likes you less for a decade, on top of the catalysts.

Accumulation does the rest. As appointments pile up, secular rulers and clergy end up at each other’s throats over this exact issue, until the chapter’s threshold is reached. Paradox describes a Church that grows weary of lay actions and chooses to settle the conflict by entering the Investiture Controversy.

A 30-year countdown

Dev Diary #4 (23 June) had already set the principle: each future chapter accumulates progress through catalysts and takes over at 1,000 points. Appointments are a new engine for it. When the chapter begins, a 30-year countdown starts and every relevant ruler is notified of a unique ecumenical assembly: the Investiture Council.

This council is a special version of the existing Ecumenical Council. It does not discuss tenets or doctrines. All clergy are expected to take part and vote on one question: does Christendom uphold the “Spiritual, Revocable” doctrine, or must it accept the “Temporal, Revocable” doctrine? It can never be triggered manually elsewhere.

The overall voting trend is visible in the Situation interface. Paradox is considering showing more precise figures before release. By default, every participating clergyman votes for Spiritual, Revocable.

How to sway the vote

A secular ruler has two main levers. The first is to obtain puppets, who vote as their puppeteer directs. The second is a new casus belli, Investiture Conflict, which lets each side compel a participant to vote for the winner’s side on victory.

This casus belli has no usage cap. Over the 30-year countdown, each side can therefore chain wars to arrive at the vote with a majority. A defeat also compels you to vote for the defending winner’s side.

A one-time decision finally lets you pledge allegiance to the Pope. The player commits to voting Spiritual, Revocable no matter what, in exchange for improved standing with Rome. It is the opposite of a lever: you give up your voice to buy favour.

A deliberately simple debate

The Pope hosts by default. If the Pope is a player, or if an AI Pope is unavailable, a qualified archbishop steps in to prepare the council and send invitations. If the host is disqualified partway through, another archbishop can take over within a couple of months. Invitees receive advance notice to plan their travel.

The debate phase is deliberately plain, because the mechanics that change votes resolve during the 30-year preparation. There is one exception: with piety in reserve, you get a handful of chances to sway opponents before the votes are cast. The cost rises on each attempt. If you back the side with fewer votes, the sway becomes a combined Diplomacy and Learning challenge.

Two outcomes, not three

The side with the most votes enforces its preferred appointment doctrine, which ends the chapter. If Temporal, Revocable wins, the Situation shifts to the Fragile Unity instability chapter. If Spiritual, Revocable wins, the outcome judged more probable, it moves to the Reform chapter for the Church’s benefit. According to the diary, no other chapter can be entered from the Controversy.

The numbers to keep

7 chapters in the Christian Situation, including the Investiture Controversy.
1,000 catalyst points for a chapter to take over.
10 years of reduced opinion with the whole clergy if you replace a clerical title holder.
30 years of countdown before the Investiture Council.
2 doctrines on the ballot: Spiritual, Revocable and Temporal, Revocable.
3 puppet types at release: Realm Priest, Clerical Ruler and Secular Ruler.
19.99 EUR for the DLC, released on 30 September with patch 1.20.0 Crozier.

What matters for your campaign

What matters is the asymmetry. The clergy vote Spiritual by default, so a secular ruler starts behind and has to close the gap with gold, piety and wars, not with gentle diplomacy. In practice, the Controversy rewards whoever prepares 30 years ahead, and punishes whoever carelessly appoints one archbishop too many.

Paradox also acknowledges a community criticism: secular rulers had too little influence over the appointment of chaplains and archbishops. This chapter is the announced answer, with Conditional appointment as the entry price.

The rest of the framework builds around it. The seven chapters, catalysts such as marriages, holy wars or heresies, and the Christian Situation are detailed in our analysis of Dev Diary #4. The decision to become Pope is covered in the playable Pope preview.

What to watch before 30 September

At the date of this Dev Diary, several points remain unclear. The interface may show more precise vote figures. The exact cost of persuasion attempts and the strength of the Investiture Conflict casus belli are not given. How well the AI can play this conflict over 30 years also remains to be checked once the DLC launches.

To understand the base game before diving into the expansion, our beginner’s guide to Crusader Kings 3 covers the realm systems that By God Alone shakes up.