Games like Age of Magic
Games like Age of Magic include Blackthorn Arena: Reforged, Foundation, Manor Lords, Crusader Kings III, and Cities: Skylines. We matched them by the tags players give Age of Magic on Steam (Simulation, Strategy, Fantasy, Management, and Medieval): closest matches first, and among equally close ones the better-known games.

Blackthorn Arena: Reforged
Shared: Simulation · Strategy · Fantasy

Foundation
Shared: Simulation · Strategy · Medieval

Manor Lords
Shared: Strategy · Simulation · Management

Crusader Kings III
Shared: Strategy · Simulation · Medieval

Cities: Skylines
Shared: Simulation · Strategy · Management

Tavern Master
Shared: Simulation · Management · Strategy

Kingdoms and Castles
Shared: Simulation · Management · Strategy

Dwarf Fortress
Shared: Simulation · Strategy · Management

Against the Storm
Shared: Simulation · Strategy · Management

Schedule I
Shared: Simulation · Management · Crafting

Prison Architect
Shared: Simulation · Strategy · Management

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

Blackthorn Arena
Shared: Simulation · Strategy · Management

Kenshi
Shared: Simulation · Immersive Sim · Management

Lessaria: Fantasy Kingdom Sim
Shared: Strategy · Simulation · Management

Empires of the Undergrowth
Shared: Simulation · Strategy · Management

Farthest Frontier
Shared: Strategy · Medieval · City Builder

RimWorld
Shared: Strategy · Management · Simulation

Banished
Shared: Strategy · Simulation · City Builder

This War of Mine
Shared: Strategy · Simulation · Crafting

Stranded: Alien Dawn
Shared: Simulation · Strategy · Crafting

Infection Free Zone
Shared: Strategy · Simulation · Management

Tropico 6
Shared: Strategy · Simulation · Management

Ostriv
Shared: Strategy · Simulation · Management