Games like MIGLORN
Games like MIGLORN include Thronefall, They Are Billions, Frostpunk, Manor Lords, and Kingdom Two Crowns. We matched them by the tags players give MIGLORN on Steam (Strategy, Action RTS, Building, City Builder, and Tower Defense): closest matches first, and among equally close ones the better-known games.

Thronefall
Shared: Strategy · Tower Defense · City Builder

They Are Billions
Shared: Strategy · Base Building · Tower Defense

Frostpunk
Shared: Strategy · City Builder · Survival

Manor Lords
Shared: Strategy · City Builder · Building

Kingdom Two Crowns
Shared: Tower Defense · Building · City Builder

Bee Island
Shared: Strategy · Tower Defense · City Builder

Once Human
Shared: Action · Survival · Building

RimWorld
Shared: Strategy · Survival · Base Building

Against the Storm
Shared: Strategy · City Builder · Building

Workers & Resources: Soviet Republic
Shared: Strategy · City Builder · Building

Cities: Skylines
Shared: City Builder · Building · Strategy

ARK: Survival Evolved
Shared: Survival · Building · Open World Survival Craft

Prison Architect
Shared: Building · Strategy · City Builder

Terraria
Shared: Survival · Open World Survival Craft · Building

Oxygen Not Included
Shared: Building · Survival · Base Building

Dwarf Fortress
Shared: Strategy · City Builder · Building

Rise to Ruins
Shared: Strategy · Tower Defense · City Builder

Empires of the Undergrowth
Shared: Strategy · City Builder · Building

Age of Darkness: Final Stand
Shared: Action RTS · Strategy · Tower Defense

The Riftbreaker
Shared: Tower Defense · Base Building · Survival

Raft
Shared: Survival · Building · Open World Survival Craft

Stronghold: Definitive Edition
Shared: Strategy · City Builder · Building

Banished
Shared: Strategy · City Builder · Survival

IXION
Shared: Strategy · City Builder · Survival