The Dark Adventurer was the lead ship of the Dark-class fast patrol boats built for the Royal Navy in the mid-1950s. The boats featured alloy framing and wooden decks and skin. 27 were ordered in 1954, but nine were cancelled a year later. The ships featured interchangeable armament which meant they could serve in both motor gun boat and motor torpedo boat roles, depending on their task. They were also the only diesel engine-powered fast patrol boats in the entire Royal Navy. Dark Adventurer was launched on 28th October 1954 and sold in January 1970.

The Dark Adventurer was introduced in Update 1.83 "Masters of the Sea" as part of the British fleet closed beta test. With the split of the naval tech trees in Update "New Power", Dark Adventurer was moved to the coastal fleet tech tree. The Dark Adventurer is depicted in the motor gun boat configuration featuring a single 114 mm gun on the bow and 40 mm Bofors autocannon on the stern with no torpedo launchers. Her sister Dark Aggressor is depicted in the motor torpedo boat configuration with four 533 mm torpedo tubes and 40 mm autocannon on the bow.