That Dragon, Cancer is a video game developed by Ryan and Amy Green, Josh Larson, and a small team under the name Numinous Games. The
autobiographical
game is based on the Greens' experience of raising their son Joel, who
was diagnosed with terminal cancer at twelve months old, and though only
given a short time to live, continued to survive for four more years
before eventually succumbing to the cancer in March 2014.
https://www.youtube.com/watch?v=vlKCJlhJwxU
Source:
Wikipedia