Mirage: Ignis Fatuus is a 3D spatial puzzle game that inherits the principles of the 2017 game Mirage: Illusions. This time, the player controls a cuboid, and its movement allows for more complex and interesting puzzles. RPG elements such as inventory management are added into the game, which enables the player to pick up and set objects to modify the walkable landscape, adding dynamism to the puzzles.