Pseudologia Fantasia is a sandbox game created by Toroko. The game is set within a huge galaxy with several planets, the single-player story follows follows the player character of a shapeshifter named Fantasia, who identifies as genderfluid (default state resembles something of a female), and her efforts to seek stop a galactic overlord born from crystals.
The game is played from a third-person perspective and its world is navigated on-foot or by vehicle. Players control Fantasia, who has the gimmick of transforming into every NPC in the game. An online multiplayer mode is also provided in the game, allowing up to eight players to engage in both cooperative and competitive gameplay in a recreation of the single-player setting.
Pseudologia Fantasia is an action-adventure sandbox game played from a third-person perspective. Players complete missions—linear scenarios with set objectives—to progress through the story. The galaxy may be fully explored from the beginning of the game without restrictions, although story progress unlocks more gameplay content.
As you play as Fantasia, you can transform into various NPCs who may or may not have special abilities or statuses. However, Fantasia can only transform into various NPCs by talking to them in her normal state. Additionally, your actions effect the NPCs you transform into inadvertently (getting caught murdering as a NPC and then transforming into another one only applies to that NPC, however that NPC will be punished for your actions.) As such, you must be wary of your morals and what's the best course of action.