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

Crusader Kings III
Shared: Strategy · Simulation · Medieval

The Guild 3
Shared: Life Sim · Simulation · Medieval

Supermarket Simulator
Shared: Simulation · Management · Economy

Cities: Skylines
Shared: Simulation · Strategy · Management

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

The Guild II Renaissance
Shared: Simulation · Strategy · Medieval

Foundation
Shared: Simulation · Strategy · Medieval

Jurassic World Evolution
Shared: Simulation · Strategy · Management

Cities: Skylines II
Shared: Simulation · Strategy · Management

Jurassic World Evolution 2
Shared: Simulation · Strategy · Management

Planet Coaster
Shared: Simulation · Strategy · Management

Stardew Valley
Shared: Life Sim · Simulation · RPG

Prison Architect
Shared: Simulation · Strategy · Sandbox

Anno 1800
Shared: Strategy · Simulation · Economy

Planet Zoo
Shared: Simulation · Management · Economy

Crusader Kings II
Shared: Strategy · Medieval · Simulation

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

Potion Craft: Alchemist Simulator
Shared: Simulation · Medieval · Singleplayer

Tropico 5
Shared: Strategy · Simulation · Economy

Transport Fever 2
Shared: Simulation · Strategy · Management

Tropico 6
Shared: Strategy · Simulation · Economy

Banished
Shared: Strategy · Simulation · Medieval

Manor Lords
Shared: Strategy · Simulation · Management

Railway Empire
Shared: Simulation · Strategy · Management