Games like Mercantile Might
Games like Mercantile Might include Foundation, Kingdoms and Castles, Cities: Skylines, Cities: Skylines II, and Banished. We matched them by the tags players give Mercantile Might on Steam (Strategy, City Builder, Sandbox, RTS, and 3D): closest matches first, and among equally close ones the better-known games.

Foundation
Shared: City Builder · Strategy · Sandbox

Kingdoms and Castles
Shared: City Builder · Strategy · Sandbox

Cities: Skylines
Shared: City Builder · Strategy · Sandbox

Cities: Skylines II
Shared: City Builder · Sandbox · Strategy

Banished
Shared: City Builder · Strategy · Sandbox

Manor Lords
Shared: Strategy · City Builder · Sandbox

Anno 1800
Shared: Strategy · City Builder · Sandbox

Farthest Frontier
Shared: City Builder · Strategy · Building

Prison Architect
Shared: Sandbox · Strategy · City Builder

Planet Coaster 2
Shared: Strategy · Sandbox · City Builder

Anno 117: Pax Romana
Shared: Strategy · City Builder · Sandbox

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

Tavern Master
Shared: Strategy · Management · City Builder

Ostriv
Shared: Strategy · City Builder · Management

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

Planet Coaster
Shared: Sandbox · Strategy · Management

Against the Storm
Shared: Strategy · City Builder · Management

Jurassic World Evolution
Shared: Strategy · Sandbox · City Builder

Jurassic World Evolution 2
Shared: Sandbox · Strategy · Management

Timberborn
Shared: City Builder · Sandbox · Strategy

Anno 2070™
Shared: Strategy · City Builder · RTS

Age of Empires II (Retired)
Shared: Strategy · RTS · City Builder

Stronghold Crusader HD (2012)
Shared: City Builder · Strategy · Medieval

Planet Zoo
Shared: Sandbox · Management · City Builder