Oculus VR
He founded Oculus VR, the headset company that's been described countless times as the future of virtual reality.
Facebook, which acquired Oculus for $2 billion in 2014, sees its software as the big computing platform of the next 10 years.
Luckey was on a path to greatness as the face of the social media company's VR business.
But after less than three years, Facebook has announced Luckey is leaving the company.
Here's how he went from tech darling to Facebook outcast: