Games like Codename: Panzers, Phase One
Games like Codename: Panzers, Phase One include Hearts of Iron IV, Men of War: Assault Squad 2, Company of Heroes 2, Command & Conquer™ Remastered Collection, and Rise of Nations: Extended Edition. We matched them by the tags players give Codename: Panzers, Phase One on Steam (Strategy, Simulation, RTS, War, and World War II): closest matches first, and among equally close ones the better-known games.

Hearts of Iron IV
Shared: Strategy · World War II · War

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

Company of Heroes 2
Shared: Strategy · RTS · World War II

Command & Conquer™ Remastered Collection
Shared: Strategy · RTS · Classic

Rise of Nations: Extended Edition
Shared: Strategy · RTS · Classic

Age of Mythology: Extended Edition
Shared: Strategy · RTS · Classic

Call to Arms - Gates of Hell: Ostfront
Shared: Strategy · World War II · RTS

Company of Heroes
Shared: Strategy · RTS · World War II

Steel Division 2
Shared: Strategy · RTS · World War II

STAR WARS™ Empire at War - Gold Pack
Shared: Strategy · RTS · Singleplayer

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

Company of Heroes - Legacy Edition
Shared: Strategy · RTS · World War II

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

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

Sid Meier’s Civilization® VI
Shared: Strategy · Multiplayer · Singleplayer

Steel Division: Normandy 44
Shared: Strategy · RTS · World War II

Blitzkrieg 3
Shared: Strategy · RTS · World War II

Age of History II
Shared: Strategy · War · Simulation

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

Mount & Blade II: Bannerlord
Shared: Strategy · War · Multiplayer

Age of Empires: Definitive Edition
Shared: Strategy · RTS · Singleplayer

Call to Arms
Shared: Strategy · RTS · War

Total Tank Simulator
Shared: Strategy · Simulation · World War II

Men of War: Assault Squad
Shared: Strategy · War · World War II