Shadow Tower: Abyss

The Japan only sequel to From Software's "Shadow Tower". Legends say that there was once a prosperous kingdom ruled by a mighty monarch, his powers bestowed upon him by a magical spear. Years have passed and the kingdom was completely destroyed, save for a mysterious citadel in the midst of a dangerous forest. A young explorer travels there and discovers the entrance. However, once inside the citadel, a strange old man seals the doors, trapping the explorer and compelling him to climb to the top of the gigantic structure in order to escape.