Games like Das Boot: German U-Boat Simulation
Games like Das Boot: German U-Boat Simulation include UBOAT, Men of War: Assault Squad 2, Call to Arms - Gates of Hell: Ostfront, Hearts of Iron IV, and Hell Let Loose: Vietnam. We matched them by the tags players give Das Boot: German U-Boat Simulation on Steam (Action, Adventure, Simulation, Strategy, and Naval): closest matches first, and among equally close ones the better-known games.

UBOAT
Shared: Simulation · World War II · Naval

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

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

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

Hell Let Loose: Vietnam
Shared: Action · Simulation · Strategy

Arma Reforger
Shared: Simulation · Action · Strategy

Arma 3
Shared: Action · Simulation · Shooter

Steel Division: Normandy 44
Shared: Strategy · Action · Simulation

Holdfast: Nations At War
Shared: Action · Historical · Shooter

War Thunder
Shared: Action · Simulation · World War II

Hell Let Loose
Shared: World War II · Action · Shooter

Squad 44
Shared: Simulation · World War II · Action

Destroyer: The U-Boat Hunter
Shared: Simulation · Action · World War II

Carrier Command 2
Shared: Simulation · Strategy · Adventure

Totally Accurate Battle Simulator
Shared: Simulation · Strategy · Adventure

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

Silent Hunter® III
Shared: Simulation · Naval · World War II

Assassin’s Creed® IV Black Flag™
Shared: Adventure · Action · Naval

PUBG: BATTLEGROUNDS
Shared: Action · Shooter · Adventure

Ultimate Epic Battle Simulator 2
Shared: Simulation · Action · Strategy

Shieldwall
Shared: Action · Simulation · Strategy

Mount & Blade II: Bannerlord
Shared: Strategy · Action · Simulation

Tomb Raider Game of the Year
Shared: Action · Adventure · Action-Adventure

Assassin's Creed® Origins
Shared: Action · Historical · Adventure