Looking for single realm heir succession law mods

[Mathias Kane]

Specifically I want to start my game with it, without waiting to unlock cultural advances and eras.

Thanks in advance

[Clown Inc.]

I can't find an up to date mod for this unfortunately, but you could speedrun an empire title which would be inherited by your oldest son under male preference partition. Your other titles would be redistributed but still unified under Empire, if there's only one Empire title which you hold.

[PostalGibbon]

Game already has single realm succession law from start. It is called disinherit.

If you don't want to disinherit then another way to do it: do not marry let your ruler be single get unmarried woman as lover and and get lot of bastard children.
Legitimize one son and voila you have "primogeniture" from a start until you get the real primogeniture in about year 1250.

[Hav1k]

Assuming it isn't immersion breaking for you, console commands would be your easiest and most beneficial option as you can add any innovation to any culture regardless of government type or era. The list is near infinite and can be found at the bottom of this post.

In order to access console commands the "Debug mode" version of the game must be run.

In Steam.
Right Click CK3.
Click Properties.
General Tab.
In launch options paste "-debug_mode" without quotations.
Launch Game.
Start game with your ruler.
Pressing the Tilde key opens (and closes) the console command window.

Pasting the below line into the command console window and hitting enter will unlock "Primogeniture" for your Ruler's culture.

add_innovation innovation_primogeniture

Note: You'll still of course need the required coin/prestige to enact the law, but there's a console command for those too!


https://ck3.paradoxwikis.com/Console_commands

[Mathias Kane]

Thanks, Hav1k! That's what I was missing. Now I can create my own cultures and play the way I like from the start!