Games like Fort Triumph
Games like Fort Triumph include Wartales, Jagged Alliance 3, The Last Spell, Fell Seal: Arbiter's Mark, and TROUBLESHOOTER: Abandoned Children. We matched them by the tags players give Fort Triumph on Steam (3D, Tactical RPG, Turn-Based Tactics, Local Multiplayer, and Turn-Based): closest matches first, and among equally close ones the better-known games.

Wartales
Shared: RPG · Co-op · Turn-Based Strategy

Jagged Alliance 3
Shared: Turn-Based Tactics · Tactical RPG · Turn-Based Strategy

The Last Spell
Shared: Turn-Based Tactics · Turn-Based Strategy · Tactical RPG

Fell Seal: Arbiter's Mark
Shared: Turn-Based Tactics · Tactical RPG · RPG

TROUBLESHOOTER: Abandoned Children
Shared: Tactical RPG · Turn-Based Tactics · Turn-Based

Divinity: Original Sin - Enhanced Edition
Shared: Co-op · Turn-Based · RPG

XCOM®: Chimera Squad
Shared: Turn-Based Tactics · Turn-Based · Turn-Based Strategy

Wildermyth
Shared: Turn-Based Tactics · Party-Based RPG · Tactical RPG

Expeditions: Rome
Shared: Turn-Based Tactics · Party-Based RPG · Tactical RPG

Battle Brothers
Shared: Turn-Based Tactics · Turn-Based Strategy · RPG

Demeo
Shared: Turn-Based Tactics · Tactical RPG · RPG

Songs of Conquest
Shared: Turn-Based Tactics · Local Multiplayer · Turn-Based Strategy

Stolen Realm
Shared: Turn-Based Tactics · Tactical RPG · Turn-Based Strategy

For The King
Shared: Turn-Based · RPG · Co-op

Warhammer 40,000: Rogue Trader
Shared: Tactical RPG · RPG · Turn-Based Strategy

King's Bounty II
Shared: Tactical RPG · Turn-Based Strategy · RPG

Gloomhaven
Shared: Tactical RPG · Turn-Based Strategy · Party-Based RPG

For The King II
Shared: Party-Based RPG · RPG · Turn-Based Strategy

Wargroove
Shared: Turn-Based Tactics · Tactical RPG · Turn-Based Strategy

Mordheim: City of the Damned
Shared: Turn-Based Tactics · Turn-Based · RPG

Banner of the Maid
Shared: Turn-Based Tactics · Tactical RPG · Turn-Based Strategy

Heroes® of Might & Magic® III - HD Edition
Shared: Turn-Based Strategy · Strategy · Turn-Based

King Arthur: Knight's Tale
Shared: Tactical RPG · Turn-Based Tactics · RPG

The Banner Saga 3
Shared: Turn-Based Tactics · Tactical RPG · RPG