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{{Version|Timeless}}
{{DLC
| header= Crusader Kings II
| icon= Base icon CK2.png
| logo= CK2 banner.jpg
| type= Base Game
| patch= 1.02b
| date= 2012-02-14
| pdx= crusader-kings-ii/CKCK02GSK-MASTER.html
| steam= 203770
}}
{{#evt:
| service= youtube
| id= T05xZE0AA8g
| description= "Character database": Game designer Chris King sheds details on the database used to keep track of the in-characters (part of a series of video diaries leading to the release).
| alignment= right
| container=frame
}}

[[File:Crusader Kings II.png]] '''Crusader Kings II''' is a grand strategy game with RPG elements, developed by [[File:Paradoxwiki.png]] [[wp:Paradox Development Studio|Paradox Development Studio]] and published by [[Central:Paradox Interactive|Paradox Interactive]] in 2012. It is the sequel to the original [[wp:Crusader_Kings_(video_game)|Crusader Kings]] released in 2004.

Contrary to what the title indicates, the game is not primarily about the [[Crusades]], but it was too late to rebrand it.<ref>http://bibicon.it/breakfastbug/intervista-henrik-fahraeus-lead-designer-di-crusader-kings-ii/#tabs-421-0-1</ref>
The game is a [[dynasty]] and [[feudalism]] simulator, set during the [[Key years|Early, High and Late Middle Ages]] in Europe, north and east Africa, and western Asia. 
It is based on the Clausewitz 2.5 Engine, which it shares in common with [[eu4:Europa Universalis IV|Europa Universalis IV]].

It was met with generally positive reviews and has attained a metascore of 82 on [http://www.metacritic.com/game/pc/crusader-kings-ii Metacritic].

==Key milestones==

[[File:CK2 3YearsOf.jpg|right|500px|thumb|3 years of Crusader Kings II]]

*August 19, 2010: Crusader Kings II development is officially announced.
*October 11, 2011: a closed beta is announced.
*February 4, 2012: a [http://www.crusaderkings.com/media/demos demo] is released, featuring four playable characters over a 20-year span
*February 14, 2012: game is released for Microsoft Windows.
*May 24, 2012: game is released for Mac OS X.
*June 26, 2012: [[Sword of Islam]] major DLC is released.
*October 16, 2012: [[Legacy of Rome]] major DLC is released.
*January 14, 2013: game is released for Linux.
*January 15, 2013: [[The Republic]]  major DLC is released.
*May 28, 2013: [[The Old Gods]] major DLC is released.
*November 18, 2013: [[Sons of Abraham]] major DLC is released.
*December 20, 2013: GamersGate version is discontinued, and users receive free Steam keys for their purchased base game and DLCs.
*March 25, 2014: [[Rajas of India]] major DLC is released, [[Steam Workshop]] support added.
*September 18, 2014: CKII base game has sold over one million copies, and 7 million units of DLCs/expansions.<ref>[[Forum:801671]]</ref>
*October 14, 2014: [[Charlemagne]] major DLC is released.
*December 16, 2014: [[Way of Life]] major DLC is released.
*July 14, 2015: [[Horse Lords]] major DLC is released.
*February 2, 2016: [[Conclave]] major DLC is released.
*August 25, 2016: [[The Reaper's Due]] major DLC is released.
*March 7, 2017: [[Monks and Mystics]] major DLC is released.
*November 16, 2017: [[Jade Dragon]] major DLC is released.
*November 13, 2018: [[Holy Fury]] major DLC is released.

==Expansion model==

{{Main|Downloadable content}}

Expansion model is based on a combination of:
*paying [[major DLC]]s that unlock new gameplay (new playable characters or new features)
*free major content [[patches]] that contain the updates on core mechanics and essential features used by the DLC
*paying minor [[DLC]]s that unlock [[music]], graphical or customization features that do not impact gameplay

According to CKII project lead, some features were cut from base game to fit in the 18-month project duration and a few ended up in either DLC or free content patch, who is basically paid by those who do buy the DLCs.<ref>[[Forum:591934]]</ref>

One of the lessons learnt from [[Sons of Abraham]] expansion and the dilemma between putting larger more central features in the DLC, but keeping core mechanics in the free patch is that "''future expansions will either have to unlock new areas of the game or feature more noticeable (graphically or through sheer weight of content) stuff.''"<ref>[[Forum:740674]]</ref>

Starting with [[Horse Lords]], all graphical and music packs are marketed into a single "content pack" named after the associated major expansion.<ref>[[forum:870439/page-3#post-19642910|Why can't we buy content (music, face, unit packs) individually? Why reduce consumer choice?]]</ref>

Going further into the reduction of new DLCs, starting with [[Monks and Mystics]] packs are directly bundled inside the expansion.

==Quality assurance==

Being a sandbox game, CKII testing process is not trivial. Paradox has reported running nightly automated playthroughs in [[Observer]] mode, to check game balance.

After the difficult launch of [[patch 2.0]], Paradox acknowledged an overload and complexity issue regarding QA, and decided to rely more on Steam Open Beta [[patches]] while at the same time hiring more QA and increasing size of closed beta test group.<ref>[[Forum:740674]]</ref>

==Performance==

{{Main|Optimization}}

RAM and CPU load has been the limiting factor in expanding the map,<ref>http://bibicon.it/breakfastbug/intervista-henrik-fahraeus-lead-designer-di-crusader-kings-ii/#tabs-421-0-1</ref> due to the low [[system requirements]] dating from 2012 (32-bit, 2Gb of RAM, Intel® Pentium® IV).
As the in game years go by, the game may slow down due to:
*the increased number of characters, and the time required to process events and decisions on them.
*the increased character and title history, increasing auto-save time. 

Despite many optimizations, the release of [[Rajas of India]] patch, with the inclusion of 327 new provinces (+22%), had the most noticeable impacts.

In order to be able to continue adding new content, a special focus on optimization took place during the development of [[patch 2.7]], with a -30% to -50% speed improvement.<ref>[[forum:962057|CK2 Dev Diary #18: Optimization and modding]]</ref>

==See also==

*[[Game manuals]]
*[[System requirements]]
*[[Patches]]
*[[DLC]]

== Dev diaries ==
{{main|Developer diaries}}
{{#lsth:Developer diaries|Base game}}

==External links==
*[http://forum.paradoxplaza.com/forum/forumdisplay.php?551-Crusader-Kings-II Official forum]
*[[wp:Crusader Kings II|Crusader Kings II on Wikipedia]]
*[http://www.reddit.com/r/CrusaderKings Crusader Kings II on Reddit]

==References==
<references />

[[Category:Crusader Kings II|#]]