In the Epilogue of Heavy Rain, if the player saves Shaun with Madison and Ethan alive, it will show the three of them starting a new life. When they enter their new apartment, Ethan says "A friend of a friend let me jump in line."

In a previous game made by David Cage, Indigo Prophecy, the main character lives in the apartment that they are moving in to, and it is implied that "the friend of a friend" is Lucas Kane, the protagonist in Indigo Prophecy.