Desolation

Set many years after Portal 2, 'Desolation' tells the story of a cybernetically-enhanced test subject named Diana Mendez. After sustaining injuries, Diana is fitted with Aperture’s BRACE cybernetic system, featuring a suite of robotic upgrades including an integrated Portal Device. When a relentless threat emerges, she must embark on a perilous journey that will see her uncover Aperture’s mysterious past... and maybe even face her own.