Check out the first-ever gameplay preview for PORTAL 2: DESOLATION, featuring fast-paced puzzle gameplay and a new cybernetic Portal Gun: the ARM. Stay tuned this weekend for more.

>UPDATE: Y BRACE yourself: the latest Portal 2: Desolation Development Showcase is here. Tune in to the live premiere of our Graphics Overhaul Showcase at 12pm ET, then join us to celebrate the launch of a brand new Desolation Official Website! youtu.be/RjoatjztY_Y #portal