You receive a royal summons, ride to a quiet monastery, and within hours, you’re trapped under quarantine. Mysteria Ecclesiae—the haunting new story DLC for Kingdom Come: Deliverance 2—transforms Henry’s journey from sword-swinging knight to truth-seeking investigator.
In this guide, we’ll break down everything you need to know to begin your investigation, survive the plague-ridden monastery, and uncover the truth behind the church’s most chilling mystery.
🕯️ What Is Mysteria Ecclesiae?
Released November 11, 2025, Mysteria Ecclesiae (Latin for “Mysteries of the Church”) is the third and final story DLC in the Kingdom Come: Deliverance 2 Expansion Pass.
This self-contained narrative takes place in the Sedletz Monastery, where Henry is tasked with investigating a series of mysterious deaths—until a plague forces a total lockdown.
Key Features:
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5–8 hours of new content
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Investigation and stealth-focused gameplay
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Historically accurate monastery setting
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Nine new trophies and multiple endings
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Deep narrative emphasis on moral choices and deduction
This DLC trades combat for dialogue, observation, and deduction—showing just how flexible Kingdom Come’s systems can be.
⚔️ How to Start the Mysteria Ecclesiae DLC
Requirements:
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Main Quest Progress: Reach Day 2 of Quest #13 – The Sword and the Quill.
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Quest Starter: Look for a purple map icon with a golden cross in Suchdol (or Kuttenberg if you’ve finished the main story).
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Talk to: Peter of Pisek to begin “The Royal Physician.”
💡 Pro Tip: The DLC is best experienced after completing the main story—some persuasion checks and lore references hit harder with a high-skill Henry.
🏰 New Setting: Sedletz Monastery
Mysteria Ecclesiae’s Sedletz Monastery is one of the most detailed environments Warhorse Studios has ever built.
Once the quarantine begins, it becomes your entire world—an evolving microcosm of fear, faith, and suspicion.
Notable Areas:
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Chapel and Crypt Chambers
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Monk Dormitories & Infirmary
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Secret tunnels beneath the abbey
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Gardens, libraries, and storage halls
Expect the tone to shift from serene religious peace to full-blown paranoia as the sickness spreads.
🔍 Gameplay: Detective Work Over Combat
Mysteria Ecclesiae replaces open-world battles with a closed-room mystery, relying on intelligence and empathy instead of swords.
Core Mechanics:
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Dialogue & Persuasion: Extract truths and lies from frightened monks.
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Environmental Investigation: Find clues, blood stains, and hidden journals.
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Stealth Exploration: Sneak into restricted areas as the lockdown intensifies.
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Deduction: Combine clues to confront suspects and reveal the cause of the outbreak.
Combat skills take a backseat here—you’ll need Speech, Stealth, and high Charisma to survive socially and mentally.
🧳 Preparation Tips Before Starting
Once you start the DLC, you’re locked inside the monastery until completion. Prepare before talking to Peter of Pisek.
Recommended Inventory:
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🔦 Torch – for dimly lit tunnels and night patrols
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🍺 10+ Saviour Schnapps – manual saves are critical
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💎 Charisma 25+ Outfit – crucial for persuasion checks
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🗝️ Lockpicks – for secret areas and locked relic chests
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🌿 Marigold Decoctions & Bandages – essential healing items
Skill Focus:
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Prioritize Speech, Stealth, and Charisma.
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Combat skills are rarely needed but may help with intimidation options.
🕵️♂️ Navigating the Quarantine and Investigation
When the gates close, the tension begins. To solve the mystery efficiently:
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Talk to Everyone: Every monk and visitor holds unique information.
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Explore Thoroughly: Check crypts, archives, and kitchens for hidden evidence.
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Monitor Suspicion: Guards will question you if you’re caught sneaking—time your moves.
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Complete Side Quests Early: Some quests vanish after key story points.
Key Missable Quests:
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Maddening Pain
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Our Old Bread
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Foreseeing Evil
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The Last Wish
Multiple saves are essential if you want all achievements.
💎 Rewards and Hidden Secrets
Mysteria Ecclesiae includes:
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New Monk Outfit – unique charisma bonus
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Sanctified Sword – symbolic relic hidden beneath the abbey
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Alchemical Potions – exclusive healing and investigative brews
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Nine Achievements – tied to stealth, deduction, and moral decisions
⚠️ Completionists: Some trophies require moral choices or outcomes that can’t all occur in one playthrough.
🌑 Why Mysteria Ecclesiae Stands Out
Fans and critics praise this DLC for:
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Atmospheric tension rivaling Oblivion’s Dark Brotherhood quests
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Deep moral storytelling and player choice
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Clever integration of history and faith-based intrigue
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A bold shift from action to psychological mystery
It’s Kingdom Come at its most mature—historically rich, narratively tight, and full of emotional weight.
🏁 Final Recommendations
Mysteria Ecclesiae is a must-play for fans craving a slower, story-driven mystery with emotional depth.
Approach with patience—this isn’t a quest to rush. Observe, listen, and connect the human threads behind the sickness.
When you finally uncover the truth within the monastery’s shadowed walls, you’ll realize this is not just Henry’s final mission—it’s his spiritual reckoning.
❓ FAQs About Kingdom Come: Deliverance 2 – Mysteria Ecclesiae
Q1. Is Mysteria Ecclesiae playable before finishing the main story?
A. Technically yes, but most dialogue checks assume a high-skill Henry. It’s best played post-game.
Q2. How long does the Mysteria Ecclesiae DLC take to complete?
A. Around 6–8 hours for the main story, longer if you aim for all achievements.
Q3. Can you fight in this DLC?
A. Combat is minimal—focus on dialogue, stealth, and investigation instead.
Q4. Are there multiple endings?
A. Yes, your choices determine who lives, dies, and how the truth is revealed.
Q5. Will my main game progress carry over after finishing the DLC?
A. Yes, returning to free roam is seamless once you finish the main questline.
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