The Labyrinth of Time is a bonus dungeon in the PSP and iOS versions of the original Final Fantasy. It consists of various floors, each one containing puzzles that must be solved on time for the player to be able to proceed. If the player fails to solve the puzzle on time, a dense fog will invade the area, sapping the party's HP and increasing the encounter rate, and the player will unlock the red seal of the floor when completing the puzzle, which is a sign of failure. Successfully completing a floor will allow the player to unlock its blue seal; either way, a passage to the next floor becomes available. Stages are chosen at random on each playthrough.