RAIN is a solo game about auditory hallucinations. The games comes as an A3 sheet of paper, with the rules and a diagram to help understand the board printed on the rear. Players are expected to provide any other required components. The board has different tracks for the volume of the protagonist's hallucinations, the current time, and the time you expect the hallucinations to subside. The player will use a die to determine if the current volume of rain is enough to drown out the hallucinations. If it is, the player will be able to advance the current time on the tracks. If it is not, the player is instructed to wait a period of time equal to the distance between the current time and the time they were trying to move on that track. The time tracks are in 8 different units, such as seconds, minutes, hours, days, and weeks. The rules include an exception for the game ending in case the remaining period of the game would exceed your expected lifetime.