Location from Persona 5 Royal by Atlus
The collective Palace of Tokyo's entire population — a vast, ever-descending subway system manifesting the public's shared distortions. The Phantom Thieves farm it for missions and resources.
Mementos doesn't have a single ruler because the public has no single face. It belongs to everyone, which makes it belong to no one — except Yaldabaoth, who uses it as the instrument of humanity's self-imprisonment. The Phantom Thieves gain access to new paths as their fame increases: public awareness of the Phantom Thieves translates literally into deeper penetration of the collective unconscious. José appears at rest points, trading with parties for rare items. Requests from the Phansite send the team after non-boss Shadow targets. At the deepest level, beyond the Prison of Regression, the Holy Grail waits. Mementos exists as long as people choose not to think for themselves.
A sprawling underground transit network of crumbling concrete and exposed rebar. Trains run without passengers. Mosaic tile walls fade into blackness. The deeper you descend, the more the architecture warps — tiles crack, ceilings lower, the air grows dense. Track lighting flickers. Emergency signs point to destinations that don't exist.
Also known as: Mementos, The Subway, Depths of Mementos