The following details come from Idea Factory International:

Beware! The Nightmare monster stalks you as you navigate this dungeon-crawling RPG. Stand your ground, or use traps to slow down the insatiable monsters and escape to fight another day. You’ll fight in turn-based battles and can boost up your allies with blood transformations. If you solve the dungeons’ mysteries and satisfy the prison’s desires, you just might make it out alive in Mary Skelter: Nightmares this Summer 2017!

Key Features

• Walking Nightmares The dungeon-crawling RPG genre gets a twist when special enemies can chase you through the dungeons! Lay traps to make your escape, or try to face them down!
• Blood-drenched Transformations! Characters can transform with stronger stats and extra skills, but if they fight too much they may enter Blood Skelter Mode, where they go completely berserk!
• Everyone’s got a Job Strategize your dungeon battles by assigning different classes to your characters, unlocking new skills, stats, and character portraits!