Find adventure beyond your imagination and riches untold as you descend into the caves beneath an ancient castle! Match gems to remove obstacles, collect keys to unlock new passages and build your strength quickly to break through barriers in Caves and Castes: Underworld, a sometimes relaxing, sometimes heart-racing match-three game! Above ground, rebuild a beautiful castle, but beware of a strange force trying to prevent you from achieving your goal! Unlock one mystery after another as you restore this stunning structure to its former glory!