When Ryan and Amy Green learned that their baby son Joel's rare cancer was terminal, Ryan, an indie game developer, found solace in the only creative outlet he knew: a video game, the critically acclaimed "That Dragon, Cancer."

Ryan Green's four year old son Joel has terminal cancer. Ryan, an indie video game developer, is building an unusually poetic video game to document his experiences raising a dying child, and to honor Joel while he is still alive. 'Thank You For Playing' follows the creation and growing success of Ryan's game, as his son's health continues to decline.

When Ryan and Amy Green learned that their baby son Joel's rare cancer was terminal, they were devastated. Searching for a way to explore his feelings, Ryan, an indie video game developer, found solace in the only creative outlet he knew: a video game.