Games like Crusader Kings III
Games like Crusader Kings III include Crusader Kings II, Mount & Blade II: Bannerlord, Hearts of Iron IV, Sid Meier’s Civilization® VI, and Imperator: Rome. We matched them by the tags players give Crusader Kings III on Steam (Strategy, Medieval, Grand Strategy, Simulation, and RPG): closest matches first, and among equally close ones the better-known games.

Crusader Kings II
Shared: Strategy · Grand Strategy · Medieval

Mount & Blade II: Bannerlord
Shared: Strategy · Medieval · RPG

Hearts of Iron IV
Shared: Strategy · Grand Strategy · Historical

Sid Meier’s Civilization® VI
Shared: Strategy · Grand Strategy · Historical

Imperator: Rome
Shared: Strategy · Grand Strategy · Simulation

Manor Lords
Shared: Strategy · Simulation · Grand Strategy

Total War: MEDIEVAL II – Definitive Edition
Shared: Strategy · Medieval · Grand Strategy

Europa Universalis IV
Shared: Strategy · Grand Strategy · Simulation

Knights of Honor II: Sovereign
Shared: Strategy · Medieval · Simulation

Heroes of Might and Magic: Olden Era
Shared: Strategy · RPG · Grand Strategy

Mount & Blade: Warband
Shared: Medieval · Strategy · RPG

The Guild 3
Shared: Medieval · Strategy · Simulation

Victoria II
Shared: Strategy · Grand Strategy · Historical

Terra Invicta
Shared: Strategy · Grand Strategy · Simulation

Age of History II
Shared: Strategy · Grand Strategy · Historical

Workers & Resources: Soviet Republic
Shared: Strategy · Simulation · Grand Strategy

Rebel Inc: Escalation
Shared: Strategy · Grand Strategy · Simulation

Victoria 3
Shared: Strategy · Grand Strategy · Simulation

Stellaris
Shared: Strategy · Grand Strategy · Simulation

Old World
Shared: Strategy · Simulation · Grand Strategy

Total War: THREE KINGDOMS
Shared: Strategy · Grand Strategy · Historical

Mount & Blade: With Fire & Sword
Shared: Medieval · Strategy · RPG

Total War: ATTILA
Shared: Strategy · Grand Strategy · Historical

Battle Brothers
Shared: Strategy · RPG · Grand Strategy