Games like Flow Of War
Games like Flow Of War include Age of Darkness: Final Stand, Mindustry, Thronefall, The King is Watching, and Stronghold: Definitive Edition. We matched them by the tags players give Flow Of War on Steam (Strategy, Action RTS, RTS, Tower Defense, and Auto Battler): closest matches first, and among equally close ones the better-known games.

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

Mindustry
Shared: Tower Defense · Strategy · RTS

Thronefall
Shared: Strategy · Tower Defense · Action RTS

The King is Watching
Shared: RTS · Tower Defense · Base Building

Stronghold: Definitive Edition
Shared: Strategy · RTS · Medieval

Stronghold Crusader: Definitive Edition
Shared: Strategy · Tower Defense · Medieval

Tower Dominion
Shared: Strategy · Tower Defense · RTS

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

They Are Billions
Shared: Strategy · Base Building · RTS

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

From Glory To Goo
Shared: Strategy · RTS · Tower Defense

Stronghold HD (2012)
Shared: Tower Defense · Real Time Tactics · Medieval

Factorio
Shared: Strategy · Base Building · Automation

Tower Factory
Shared: Strategy · Tower Defense · RTS

Warpips
Shared: Strategy · RTS · Tower Defense

There Are No Orcs
Shared: RTS · Tower Defense · Auto Battler

Planetary Annihilation: TITANS
Shared: Strategy · RTS · Base Building

Border Pioneer
Shared: Strategy · Tower Defense · Base Building

Broken Arrow
Shared: Strategy · RTS · Action RTS

Buggos
Shared: Strategy · RTS · Auto Battler

Diplomacy is Not an Option
Shared: RTS · Base Building · Medieval

GemCraft - Frostborn Wrath
Shared: Strategy · Tower Defense · RTS

Kingdom Two Crowns
Shared: Tower Defense · Strategy · Base Building

Company of Heroes 3
Shared: Strategy · RTS · Action RTS