Crusader.kings.ii.holy.fury.update.v3.1.0-codex...

Before the v3.1.0 specific tweaks, the base expansion introduced several game-changing systems available on the Crusader Kings II Wiki:

The v3.1.0 patch brought critical balancing to prevent certain mechanics from becoming overpowered:

Pagan characters can join exclusive martial societies to climb ranks, unlock powerful combat bonuses, and call upon spiritual allies. Crusader.Kings.II.Holy.Fury.Update.v3.1.0-CODEX...

The prestige requirement for the "Forge Bloodline" ambition was increased to 15,000 , and the spawn rate for legendary lineages like Alexander the Great or Ashoka was reduced to maintain their rarity.

Players can bypass historical maps for fictionalized versions of Europe or completely randomized continents. Before the v3

The Pope was made less likely to grant excommunication requests for landless characters, and the AI for Byzantine Electors was improved to prioritize candidates with high Martial or Intrigue.

Event troops for the Children's Crusade now correctly disband once the war ends, and a higher morale penalty was applied to reflect the "army" of peasants and children. The Pope was made less likely to grant

New diplomatic options allow for focused long-term efforts to either charm a rival into a friend or goad an enemy into a mistake.