Memento Mori by Two Little Mice is a folk-horror tabletop RPG set in 1347 Europe, amidst the devastation of the Black Death. Players assume the roles of Drifters—individuals afflicted by the plague who, in their quest to fulfill their Dreams, encounter dark creatures from folklore. As they confront these horrors, they gradually lose their humanity, transforming into the very monsters they battle.

The game employs an original system using two pools of six-sided dice: white dice represent the Drifters' human skills, while black dice signify their developing supernatural powers and monstrous traits. This mechanic emphasizes the characters' corruption and transformation, forcing players to make sacrifices to achieve their goals.

The corebook provides everything needed to play, including the setting and an introductory adventure. Additional supplements such as Codex Gigas and Ex Velum expand the game's universe with new creatures, rituals, and esoteric knowledge. The Arca Fati box offers custom dice and tarot cards to enhance gameplay.

Memento Mori is recommended for mature audiences due to its dark themes and complex moral choices. It’s a compelling choice for players interested in narrative-driven games that explore the balance between humanity and monstrosity.