In The Drowned City Campaign Expansion, one to four investigators explore the mysterious and deadly city of Rlyeh as it rises from the oceans depths. As players venture into the tomb-like ruin, theyll scale the citys crumbling foundations, scour the sea floor for alien artifacts, navigate mind-bending machinery and shifting corridors, and discover an ancient history that was drowned with the city itself. Along the way, theyll experience a unique story that changes based on their chosen investigators, and it all culminates in a climactic battle against Cthulhu himself!