Games like Operation: Polygon Storm - The Train DLC
Games like Operation: Polygon Storm - The Train DLC include Starship Troopers: Terran Command, Warpips, Hearts of Iron IV, Company of Heroes 2, and Broken Arrow. We matched them by the tags players give Operation: Polygon Storm - The Train DLC on Steam (Strategy, Tower Defense, RTS, War, and Tactical): closest matches first, and among equally close ones the better-known games.

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

Warpips
Shared: Strategy · Tower Defense · RTS

Hearts of Iron IV
Shared: Strategy · War · Tactical

Company of Heroes 2
Shared: Strategy · RTS · Tactical

Broken Arrow
Shared: Strategy · RTS · War

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

Totally Accurate Battle Simulator
Shared: Strategy · War · Simulation

Steel Division 2
Shared: Strategy · RTS · War

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

Age of Empires III: Definitive Edition
Shared: Strategy · RTS · War

Wargame: Red Dragon
Shared: Strategy · RTS · Tactical

Cossacks 3
Shared: Strategy · RTS · War

Tower Dominion
Shared: Strategy · Tower Defense · RTS

Call to Arms
Shared: Strategy · RTS · War

Master of Command
Shared: Strategy · War · RTS

Total War: WARHAMMER II
Shared: Strategy · RTS · War

This War of Mine
Shared: War · Strategy · Singleplayer

DEFCON
Shared: Strategy · War · Singleplayer

Company of Heroes
Shared: Strategy · RTS · War

Creeper World 3: Arc Eternal
Shared: Strategy · Tower Defense · RTS

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

Creeper World 4
Shared: Tower Defense · RTS · Strategy

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

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