Games like Architect of War
Games like Architect of War include Orcs Must Die!, Orcs Must Die! 3, Kingdom Rush - Tower Defense, Crimson Desert Enhanced, and Thronefall. We matched them by the tags players give Architect of War on Steam (Strategy, Tower Defense, Action, Roguelike, and Singleplayer): closest matches first, and among equally close ones the better-known games.

Orcs Must Die!
Shared: Tower Defense · Strategy · Action

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

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

Crimson Desert Enhanced
Shared: Action · Singleplayer · Combat

Thronefall
Shared: Strategy · Tower Defense · Action

Orcs Must Die! 2
Shared: Tower Defense · Strategy · Action

Hades
Shared: Action Roguelike · Action · Roguelike

Dome Keeper
Shared: Singleplayer · Action · Roguelike

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

Skul: The Hero Slayer
Shared: Action · Roguelike · Action Roguelike

Bloons TD 6
Shared: Strategy · Tower Defense · Singleplayer

Megabonk
Shared: Roguelike · Action Roguelike · Action

GemCraft - Chasing Shadows
Shared: Strategy · Tower Defense · Action

God of War
Shared: Action · Singleplayer · Third Person

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

Orcs Must Die! Deathtrap
Shared: Tower Defense · Strategy · Action

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

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

Rogue Legacy
Shared: Roguelike · Action · Singleplayer

ELDEN RING NIGHTREIGN
Shared: Roguelike · Singleplayer · Action

Rogue Tower
Shared: Strategy · Tower Defense · Roguelike

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

The Binding of Isaac: Rebirth
Shared: Roguelike · Action Roguelike · Singleplayer

Vampire Crawlers: The Turbo Wildcard from Vampire Survivors
Shared: Strategy · Roguelike · Action