Hearts of Iron IV

Hearts of Iron IV

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Doomsday series: Leviathan
File Size
16.961 MB
Sep 5 @ 8:56am
Sep 17 @ 9:25am
8 Change Notes ( view )

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Doomsday series: Leviathan

Doomsday series: Leviathans V 1.2
Did you ever wonder what would happen if giant monsters roamed the earth in the 1900. Well look no further. This mod adds Leviathans to Hearts of Iron 4.

First let’s begin with the leviathans:

The Leviathans are made with realism in mind. The monsters will react like real Monsters would, roaming the countryside, destroying everything in their path. But they are not undefeatable. If a leviathan dies, it is dead forever. There are 16 Monsters with unique flavor events scattered all around the pacific. They also have unique sounds.

As leviathans don’t have a government of some sorts they don’t have a focus tree. This is also to prevent them from improving relations.

The next big feature is Unit-X:

Unit X is a nation focused on defeating the leviathans. It comes with a unique focus tree. The main focus of Unit X is to build defenses against the kaiju’s and give out fond to rebuild after the leviathan attack. It comes with:
• A completely unique focus tree with about 70 focuses and 3 different Paths: Help, Dominance and Colonial defense
• Unique focuses for stopping a French civil war and stopping the “hydra cult”
• Over 50 new Events only dedicated to Unit X
• 14 decisions
• A scripted gui for special weapons
• 15 unique ideas (with icons)
• Unique Portraits
A unique economy system


As with all doomsday mods, there are a lot of flavor events. The mod has about 150 Flavor events. These include:
• Civil wars in France with unique events, decisions and so on.
• A secret cult in Germany with unique decisions and events.
• Other Flavor events.

Play with both doomsday mods and 40 new foci for Unit X and 15 unique Events, which only happen if both mods are activated: https://steamcommunity.com/sharedfiles/filedetails/?id=1186201730

Another big part of this mod is that it is compatible with any other mod on the workshop. I know, crazy. Please notice: Compatible doesn’t mean balanced or anything else. It just means this mod can be loaded with any other mod on the workshop. All mods except Kaiserreich worked without any problems.

We now have a discord: https://discord.gg/3PjAw5h


I don’t know any, but if you find any, please tell me

Recommended mods:

The road to 56
Other doomsday mods

If you have any suggestions or problems, please post them here.
If you want to use anything from this mod, please ask me first.
Popular Discussions View All (2)
Sep 21 @ 1:02pm
Bugs and Suggestions
Sep 16 @ 4:13pm
We need you!
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llothil Oct 17 @ 8:15pm 
Excellent. Thank you. Love the mod.
daniel  [author] Oct 17 @ 5:35pm 
@llothil: Yeah, I'm working on it.
llothil Oct 17 @ 9:49am 
Can you add original models?
Admiral Thrawn Oct 8 @ 2:00pm 
Will Road to 56 work with this mod?
daniel  [author] Sep 19 @ 5:23pm 
@General Panic: If a state is fully controlled by the leviathans, it activates a new gui, where you can press a button.
General Panic Sep 19 @ 5:01pm 
What does the incendiary bomb and cluster bomb focus do? It says that it gives the ability to drop bombs on leviathan areas, but nothing is happening
Mr.fistermaster Sep 19 @ 12:03pm 
Does this mod don't work only for me? leviathans don't appear on map same for uniX. I have all mods that change map disabled
daniel  [author] Sep 19 @ 8:08am 
@noyoki01: :steamhappy: That might be true, but Unit X for example gives some bonuses to your political power gain.
noyoki01 Sep 18 @ 8:47pm 
Ah, probably shouldn't play as an unmodded Italy then XD
daniel  [author] Sep 18 @ 8:56am 
@noyoki01: The economy depends on your political power: The ideas go away if you have enough pp. For the events: Some events are only there to do things behind the scenes. I take a look at it, but most likely it is just something that the player can't see.