War on The Sea

Take command of warships, aircraft and submarines in brutal Second World War naval battles. From carrier strikes and convoy attacks to battleship duels and historical what-ifs, every decision can change the course of the war.

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WW2 Naval Warfare, GR Style

War on the Sea puts you in command of fleets, aircraft and submarines across the Pacific and beyond. At Grim Reapers, we take those battles further with huge engagements, historical recreations, tournaments and plenty of unpredictable GR chaos.

War on the Sea Now Sails Under GR2

Our dedicated War on the Sea battles now live on Grim Reapers 2, home to full-scale Second World War naval warfare, historical matchups and massive fleet engagements.

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Choose Your Battle

From battleship duels to submarine hunts and large-scale fleet engagements, explore War on the Sea through our most popular battle types.

Denmark Strait Battles

Recreate the legendary clash between HMS Hood, Prince of Wales, Bismarck and Prinz Eugen.

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Heavy Cruiser Tournament

Watch powerful heavy cruisers battle through a brutal knockout competition where only one ship survives.

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Hunting the Bismarck

Follow the search for Germany’s most feared battleship across a series of dramatic encounters.

Join the Hunt

Naval Battles

Explore huge fleet engagements, historical matchups and unpredictable War on the Sea chaos.

Explore Naval Battles

Featured War on the Sea Battle

From carefully planned fleet actions to complete naval chaos, this is War on the Sea at its biggest, boldest and most unpredictable.

Watch More War on the Sea