Echo

A hundred and fifty years after the world burned, survival isn't living it's just waiting. Diego knows the difference. With his sister missing and a system designed to keep people like him exactly where they are, he has one shot at reaching the place where answers might exist. A virtual world built on the ruins of everything humanity lost and somewhere inside it, answers that could change everything. The game is rigged. The odds are stacked. But the real danger was never inside the game.