Games like Great Tribal Wars
Games like Great Tribal Wars include Stronghold Crusader HD (2012), Foxhole, Tropico 6, Europa Universalis IV, and Broken Arrow. We matched them by the tags players give Great Tribal Wars on Steam (Strategy, Sandbox, Espionage, Real Time Tactics, and Wargame): closest matches first, and among equally close ones the better-known games.

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

Foxhole
Shared: Wargame · Sandbox · Strategy

Tropico 6
Shared: Strategy · Sandbox · Political Sim

Europa Universalis IV
Shared: Strategy · Wargame · Sandbox

Broken Arrow
Shared: Strategy · Wargame · Real Time Tactics

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

Totally Accurate Battle Simulator
Shared: Sandbox · Strategy · Simulation

Prison Architect
Shared: Sandbox · Strategy · Building

Cities: Skylines
Shared: Strategy · Sandbox · Building

Stronghold 2: Steam Edition
Shared: Real Time Tactics · Sandbox · Strategy

Planet Coaster 2
Shared: Sandbox · Strategy · 3D

Victoria II
Shared: Strategy · Political Sim · Sandbox

Ultimate Epic Battle Simulator 2
Shared: Sandbox · Strategy · Wargame

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

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

WARNO
Shared: Strategy · Wargame · Real Time Tactics

Crusader Kings II
Shared: Strategy · Sandbox · Political Sim

The Guild 1 Remake: Europa 1410
Shared: Strategy · Sandbox · Political Sim

Sprocket
Shared: Sandbox · Wargame · Military

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

Creeper World 4
Shared: Real Time Tactics · Wargame · Strategy

Wargame: Red Dragon
Shared: Strategy · Wargame · Real Time Tactics

Cities: Skylines II
Shared: Sandbox · Strategy · Building

Planet Coaster
Shared: Sandbox · Strategy · Building