[[File:Hearts of iron iv packshot.png|400px|thumbnail|Hearts of Iron IV]]
'''Hearts of Iron IV''' (or '''HOI4''') is an upcoming grand strategy game by [[Paradox Interactive]] and the sequel to [http://www.hoi3wiki.com/Hearts_of_Iron_3 ''Hearts of Iron III'']. It covers the time period from 1936 to 1948, focusing on the build up to the Second World War and the war itself.
'''Developer Diaries''' are articles, often accompanied by videos, published by Paradox to describe the game design in detail. HOI4 diaries are planned for release monthly, later quickening in pace as release date approaches.<ref>Forum: [[forum:756563/#post-16915987|Hearts of Iron IV Developer Diary Archive & Live Stream Videos]]</ref>
The automatically updated list for these diaries is [[forum:1809|here]].
{| class="wikitable"
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! No. !! Title and Link !! Description !! Date
<!-- (To be added when DD archive thread goes up)
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|–||[[forum:629770|Developer Diary Archive]]||List of all developer diaries||
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|1 ||[[forum:754427|Our Vision]] || Design goals || 7 February 2014
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|2 ||[[forum:760702|The Tools of War]] || Equipment, production and research of || 7 March 2014
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|3 ||[[forum:766767|Bringing WWII to the mainstream]] || Dogs! || 1 April 2014
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|4 ||[[forum:769073|Land Doctrines]] || Doctrine paths || 11 April 2014
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|5 ||[[forum:774778|Production Lines]] || How things get built. || 9 May 2014