Games like ThroneForge - The Fortress War
Games like ThroneForge - The Fortress War include Thronefall, Kingdom Rush - Tower Defense, Kingdom Two Crowns, Mount & Blade II: Bannerlord, and Age of Empires II (Retired). We matched them by the tags players give ThroneForge - The Fortress War on Steam (Tower Defense, Strategy, City Builder, Medieval, and Action): closest matches first, and among equally close ones the better-known games.

Thronefall
Shared: Tower Defense · Strategy · City Builder

Kingdom Rush - Tower Defense
Shared: Tower Defense · Strategy · Singleplayer

Kingdom Two Crowns
Shared: Tower Defense · City Builder · Strategy

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

Age of Empires II (Retired)
Shared: Strategy · Medieval · City Builder

Border Pioneer
Shared: Tower Defense · Strategy · City Builder

Kingdom Rush Vengeance - Tower Defense
Shared: Tower Defense · Strategy · Medieval

Banished
Shared: City Builder · Strategy · Medieval

Stronghold Crusader: Definitive Edition
Shared: Strategy · City Builder · Medieval

Bee Island
Shared: Tower Defense · Strategy · City Builder

They Are Billions
Shared: Strategy · Tower Defense · City Builder

Kingdom Rush 6: Genesis TD
Shared: Tower Defense · Strategy · Action

Bloons TD 6
Shared: Tower Defense · Strategy · Singleplayer

Kingdom Rush Origins - Tower Defense
Shared: Tower Defense · Strategy · Medieval

Frostpunk
Shared: City Builder · Strategy · Survival

Bloons TD 5
Shared: Tower Defense · Strategy · Action

Plants vs. Zombies GOTY Edition
Shared: Tower Defense · Strategy · Singleplayer

Dungeon Defenders
Shared: Tower Defense · Strategy · Singleplayer

Stronghold: Definitive Edition
Shared: Strategy · City Builder · Medieval

Rise to Ruins
Shared: Tower Defense · City Builder · Strategy

Shieldwall
Shared: Strategy · Action · Medieval

Becastled
Shared: Strategy · City Builder · Medieval

A Total War Saga: THRONES OF BRITANNIA
Shared: Strategy · Medieval · Action

Kingdom Rush 5: Alliance TD
Shared: Tower Defense · Strategy · Singleplayer