Games like Deterrence
Games like Deterrence include Hearts of Iron IV, Starship Troopers: Terran Command, From the Depths, Company of Heroes 2, and Broken Arrow. We matched them by the tags players give Deterrence on Steam (Strategy, Tower Defense, Building, Sandbox, and War): closest matches first, and among equally close ones the better-known games.

Hearts of Iron IV
Shared: Strategy · War · Military

Starship Troopers: Terran Command
Shared: Strategy · RTS · War

From the Depths
Shared: Building · Sandbox · Strategy

Company of Heroes 2
Shared: Strategy · RTS · War

Broken Arrow
Shared: Strategy · RTS · War

Total War: THREE KINGDOMS
Shared: Strategy · War · RTS

Call to Arms
Shared: Strategy · RTS · Military

Men of War: Assault Squad 2
Shared: Strategy · War · RTS

Creeper World 4
Shared: Tower Defense · Building · Strategy

Mindustry
Shared: Tower Defense · Strategy · Building

They Are Billions
Shared: Strategy · Tower Defense · RTS

Steel Division 2
Shared: Strategy · RTS · War

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

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

Wargame: Red Dragon
Shared: Strategy · RTS · Military

Halo Wars: Definitive Edition
Shared: Strategy · RTS · War

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

Castle Story
Shared: Strategy · Building · Sandbox

Sprocket
Shared: Building · Sandbox · War

Sudden Strike 4
Shared: Strategy · RTS · War

Stronghold Crusader HD (2012)
Shared: Military · Building · Strategy

Door Kickers 2: Task Force North
Shared: Strategy · Military · Real-Time with Pause

Totally Accurate Battle Simulator
Shared: Sandbox · Strategy · War

Thronefall
Shared: Strategy · Tower Defense · Building