Games like Trio Tactics TD
Games like Trio Tactics TD include Age of Darkness: Final Stand, Age of Mythology: Retold, Thronefall, Bloons TD 6, and Inkbound. We matched them by the tags players give Trio Tactics TD on Steam (Tactical RPG, Turn-Based Tactics, Tower Defense, Strategy, and PvE): closest matches first, and among equally close ones the better-known games.

Age of Darkness: Final Stand
Shared: Tower Defense · Strategy · RTS

Age of Mythology: Retold
Shared: Strategy · RTS · 3D

Thronefall
Shared: Tower Defense · Strategy · Action

Bloons TD 6
Shared: Tower Defense · Strategy · 3D

Inkbound
Shared: Tactical RPG · Turn-Based Tactics · PvE

Cossacks 3
Shared: Strategy · RTS · Historical

Company of Heroes 3
Shared: Strategy · RTS · PvE

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

Orcs Must Die! 3
Shared: Tower Defense · Strategy · PvE

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

Mindustry
Shared: Tower Defense · Strategy · RTS

Diplomacy is Not an Option
Shared: Historical · RTS · Tower Defense

Age of Empires III: Definitive Edition
Shared: Strategy · RTS · Base Building

Rogue Tower
Shared: Tower Defense · Strategy · 3D

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

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

Tower Dominion
Shared: Tower Defense · Strategy · RTS

Kingdom Heroes 8
Shared: Tactical RPG · RTS · Strategy

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

Creeper World 4
Shared: Tower Defense · RTS · Strategy

Warhammer 40,000: Dawn of War - Definitive Edition
Shared: Strategy · RTS · PvE

Bee Island
Shared: Tower Defense · Strategy · 3D

Tempest Rising
Shared: Strategy · RTS · 3D

Infested Planet
Shared: Tower Defense · Strategy · RTS