Games like Mittelland AD
Games like Mittelland AD include Crusader Kings III, Mount & Blade II: Bannerlord, The Guild 3, The Guild II Renaissance, and Supermarket Simulator. We matched them by the tags players give Mittelland AD on Steam (Strategy, Simulation, Medieval, Economy, and Management): closest matches first, and among equally close ones the better-known games.

Crusader Kings III
Shared: Strategy · Medieval · Simulation

Mount & Blade II: Bannerlord
Shared: Strategy · Medieval · RPG

The Guild 3
Shared: Economy · Medieval · Simulation

The Guild II Renaissance
Shared: Strategy · Simulation · Economy

Supermarket Simulator
Shared: Simulation · Management · Economy

Cities: Skylines
Shared: Simulation · Strategy · Management

Heroes of Might and Magic: Olden Era
Shared: Strategy · Simulation · RPG

Crusader Kings II
Shared: Strategy · Medieval · Simulation

Tropico 6
Shared: Strategy · Simulation · Economy

Anno 1800
Shared: Strategy · Simulation · Economy

Sid Meier’s Civilization® VI
Shared: Strategy · Singleplayer · Simulation

Mount & Blade: Warband
Shared: Medieval · Strategy · RPG

Game Dev Tycoon
Shared: Simulation · Strategy · Management

Foundation
Shared: Simulation · Strategy · Medieval

Tropico 5
Shared: Strategy · Simulation · Economy

Imperator: Rome
Shared: Strategy · Simulation · Management

Planet Coaster
Shared: Simulation · Management · Strategy

Railway Empire
Shared: Strategy · Simulation · Management

Jurassic World Evolution
Shared: Simulation · Strategy · Management

Transport Fever 2
Shared: Strategy · Simulation · Management

Cities: Skylines II
Shared: Simulation · Strategy · Management

Patrician III
Shared: Strategy · Simulation · Economy

Plague Inc: Evolved
Shared: Strategy · Simulation · Singleplayer

Grand Ages: Medieval
Shared: Strategy · Simulation · Medieval