Games like Close Combat: The Longest Day
Games like Close Combat: The Longest Day include Hearts of Iron IV, Men of War: Assault Squad 2, Steel Division 2, Steel Division: Normandy 44, and Company of Heroes 2. We matched them by the tags players give Close Combat: The Longest Day on Steam (Strategy, Simulation, RTS, Wargame, 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 · Simulation

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

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

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

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

Wargame: Red Dragon
Shared: Strategy · RTS · Wargame

Company of Heroes 3
Shared: Strategy · RTS · Wargame

WARNO
Shared: Wargame · Strategy · RTS

Age of History 3
Shared: Strategy · Wargame · RTS

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

Europa Universalis IV
Shared: Strategy · Simulation · Wargame

War on the Sea
Shared: Strategy · Simulation · World War II

Graviteam Tactics: Mius-Front
Shared: Strategy · Simulation · Wargame

Wargame: Airland Battle
Shared: Strategy · RTS · Wargame

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

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

Wargame: European Escalation
Shared: Strategy · RTS · Wargame

Darkest Hour: A Hearts of Iron Game
Shared: Strategy · World War II · Simulation

Call to Arms
Shared: Strategy · RTS · Military

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

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

Blitzkrieg 3
Shared: Strategy · RTS · World War II

Men of War II
Shared: Strategy · RTS · World War II

Command: Modern Operations
Shared: Simulation · Strategy · Wargame