The Fetus is an object that has appeared in two Cube Escape games. It appears to be a nonliving human fetus, at a late stage of development. Its origin is currently unknown.
Cube Escape: Case 23[]
After the player awakens from a deep sleep, they find themselves on the floor of the Chapel. There is one locked compartment that contains the fetus inside a jar. After the player pours ink into the jar, the fetus turns into a heart, which is used to unlock another compartment.
Cube Escape: Theatre[]
Inside the Theatre's bathroom, the fetus can be obtained by plunging the toilet, and used in the first play, "The Lady of the Lake". During the play, the starring actress will ask the player to balance the substances of her past lives. The fetus, along with the heart, a shell, and the hat that Ms. Pheasant wore as the Lady in Blue, is placed onto one of the four scales. When they are properly balanced, a beam of light from her mouth and sprouts a pink flower, ending the play.