Games like Castles
Games like Castles include Manor Lords, Tavern Master, Stronghold Crusader HD (2012), Farthest Frontier, and Against the Storm. We matched them by the tags players give Castles on Steam (Strategy, Adventure, Building, Real Time Tactics, and Historical): closest matches first, and among equally close ones the better-known games.

Manor Lords
Shared: Strategy · Historical · Building

Tavern Master
Shared: Building · Strategy · Management

Stronghold Crusader HD (2012)
Shared: Real Time Tactics · Building · Strategy

Farthest Frontier
Shared: Strategy · Building · Resource Management

Against the Storm
Shared: Strategy · Building · Historical

Cities: Skylines
Shared: Building · Strategy · Management

News Tower
Shared: Strategy · Building · Historical

Workers & Resources: Soviet Republic
Shared: Strategy · Building · Historical

Shadow Tactics: Aiko's Choice
Shared: Strategy · Real Time Tactics · Adventure

Desperados III
Shared: Strategy · Real Time Tactics · Isometric

Stronghold: Definitive Edition
Shared: Strategy · Real Time Tactics · Building

Railway Empire
Shared: Strategy · Building · Historical

Prison Architect
Shared: Building · Strategy · Management

Age of Empires II (Retired)
Shared: Strategy · Historical · Resource Management

Shadow Tactics: Blades of the Shogun
Shared: Strategy · Real Time Tactics · Isometric

Sid Meier’s Civilization® VI
Shared: Strategy · Historical · Building

Jurassic World Evolution
Shared: Building · Strategy · Management

Ostriv
Shared: Strategy · Historical · Building

Planet Coaster
Shared: Building · Strategy · Management

Stronghold Crusader: Definitive Edition
Shared: Strategy · Real Time Tactics · Building

Oxygen Not Included
Shared: Building · Resource Management · Strategy

Frostpunk
Shared: Strategy · Building · Resource Management

Stronghold: Warlords
Shared: Real Time Tactics · Building · Strategy

Empires of the Undergrowth
Shared: Strategy · Building · Historical