Games like Kingdom's Life
Games like Kingdom's Life include Europa Universalis IV, Crusader Kings II, Sid Meier's Civilization VII, Crusader Kings III, and Age of History II. We matched them by the tags players give Kingdom's Life on Steam (Strategy, 4X, Grand Strategy, Sandbox, and Simulation): closest matches first, and among equally close ones the better-known games.

Europa Universalis IV
Shared: Strategy · Grand Strategy · 4X

Crusader Kings II
Shared: Strategy · Grand Strategy · Simulation

Sid Meier's Civilization VII
Shared: Strategy · Grand Strategy · 4X

Crusader Kings III
Shared: Strategy · Grand Strategy · Simulation

Age of History II
Shared: Strategy · Grand Strategy · Political Sim

Europa Universalis V
Shared: Strategy · Grand Strategy · Simulation

Sid Meier’s Civilization® VI
Shared: Strategy · Grand Strategy · 4X

Stellaris
Shared: Strategy · Grand Strategy · 4X

Heroes of Might and Magic: Olden Era
Shared: Strategy · Grand Strategy · 4X

Imperator: Rome
Shared: Strategy · Grand Strategy · Simulation

Victoria II
Shared: Strategy · Grand Strategy · Simulation

Terra Invicta
Shared: Strategy · Grand Strategy · 4X

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

Rebel Inc: Escalation
Shared: Strategy · Grand Strategy · 4X

Manor Lords
Shared: Strategy · Grand Strategy · Simulation

Totally Accurate Battle Simulator
Shared: Sandbox · Strategy · Simulation

Victoria 3
Shared: Strategy · Grand Strategy · Simulation

Battle Brothers
Shared: Strategy · Grand Strategy · Turn-Based Tactics

Old World
Shared: Strategy · 4X · Grand Strategy

Mount & Blade II: Bannerlord
Shared: Strategy · Sandbox · Simulation

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

Songs of Syx
Shared: Strategy · Sandbox · Grand Strategy

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

Age of History 3
Shared: Strategy · Grand Strategy · Wargame