Irisu Syndrome is a freeware physics puzzle game created by Japanese developer wtatsu, about a group of friends on a summer camping trip that takes a dark turn when one of them goes missing. The gameplay involves shapes of various colors falling down in a tetris-like play field. It has garnered a small, cult following due in part to it's unconventional story.

Irisu Syndrome is a freeware physics puzzle game created by Japanese developer wtatsu, about a group of friends on a summer camping trip that takes a dark turn when one of them goes missing. The gameplay involves shapes of various colors falling down in a tetris-like play field. It has garnered a small, cult following due in part to it's unconventional story.