Games like Dying Reign
Games like Dying Reign include Crusader Kings III, Manor Lords, Prison Architect, Oxygen Not Included, and Against the Storm. We matched them by the tags players give Dying Reign on Steam (Outbreak Sim, Colony Sim, Management, Medieval, and PvE): closest matches first, and among equally close ones the better-known games.

Crusader Kings III
Shared: Medieval · Strategy · Grand Strategy

Manor Lords
Shared: Strategy · Management · Grand Strategy

Prison Architect
Shared: Colony Sim · Management · Strategy

Oxygen Not Included
Shared: Colony Sim · Management · 2D

Against the Storm
Shared: Strategy · Management · Colony Sim

RimWorld
Shared: Colony Sim · Management · Strategy

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

Empires of the Undergrowth
Shared: Colony Sim · Strategy · Grand Strategy

Crusader Kings II
Shared: Medieval · Grand Strategy · Strategy

Banished
Shared: Colony Sim · Strategy · Medieval

Victoria 3
Shared: Strategy · Grand Strategy · Management

Europa Universalis IV
Shared: Grand Strategy · Strategy · Historical

Norland
Shared: Colony Sim · Strategy · Management

Tavern Master
Shared: Management · Medieval · Strategy

Foundation
Shared: Medieval · Management · Strategy

Farthest Frontier
Shared: Medieval · Strategy · Colony Sim

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

Ostriv
Shared: Colony Sim · Management · Strategy

Imperator: Rome
Shared: Grand Strategy · Strategy · Management

Kingdoms and Castles
Shared: Colony Sim · Management · Strategy

Knights and Merchants
Shared: Colony Sim · Medieval · Strategy

Whiskerwood
Shared: Colony Sim · Strategy · Management

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

Cataclismo
Shared: Strategy · Management · Grand Strategy