Delta Green: Night and Water

It's 1944. Files recovered in a recent raid reveal a secret facility in Fécamp, where the Karotechia, a secret Nazi occult organization, is testing a new weapon for widespread production, the Donnerschlag ("Thunderclap").

In less than seven hours, several RAF Wellington bombers will erase the cliffs, the Donnerschlag, and the facility from the face of the Earth forever. The allied command who organized the air raid knows nothing about this operation, and it is thought best by those really in control that this remains the case.

A small group within the OSS, those with DELTA GREEN clearance, and their British counterparty, PISCES, are sending in teams of freshly trained commandos to find out just what the Allies are about to erase.