How is your game related to the Theme and Special Object?
The game takes the theme "Death Is Good" quite literally and so the protagonist (Thanatos - God of Death) takes upon himself to free the souls of the mortals who had been subjugated by a new tyrant demi-God in the underworld. However, once he has entered this demi-God's territory, he must free enough souls to attain the key needed to escape the place. While trying to kill the mortals, the fallen angels guarding the place as well as some of the mortal souls will try to kill you.