Gregor's Notebook is an action game played in a top-down perspective. Players fight against the demon army that rules the dark world using their special powers.

For many years, the demon army had plunged all universes into darkness. Known as the Black Army, this demonic force burned down every place where humanity lived and all the cultures they built with flames of devastating intensity. However, while hunting in the forest, Gregor heard a voice and ran towards it, becoming a beacon of hope in this darkness.

Gregor ran towards a voice coming from a cave and discovered a portal. He entered the portal and was teleported to the elf realm, which had also suffered from the disaster. Not wanting this catastrophe to happen in his own world, Gregor teamed up with an elf princess to seal the portal. This trapped the Black Army in the elf realm, and Gregor decided to fight to save this dark world.

Gregor's Notebook prepares players to fight against the most dangerous enemies of the dark world by offering them special powers, weapons, and abilities. Players will progress through Gregor's story by battling foes, passing levels, and facing challenging bosses.