Ancient civilizations got lost in time, almost nothing remains and nothing is known about its obliteration.
One of the last sites of this civilization’s resistance still stands, albeit in ruins: A temple of an ancient god! In this ruin the blood of this god is still flowing and stored in some artifacts, this life force can be controlled but it causes terrible things to happen.

Rumors also say that some remnants of ancient times are still there, and that this God has a Last Oath.

Last Oath is a single-player role-playing full illustrated gamebook in the style of Fighting Fantasy created by Lucas Rolim.