Portal 2 AR game designed by indie devs
Brenna Hillier
12 years ago
Portal 2 ARG ongoing, Half-Life hints draw Internet's eye
13 years ago
Aperture Science adds mysterious new countdown clock
Jessica Citizen
Portal 2 to release early? Potato sack ARG signs point to "yes"
Nathan Grayson
Portal levels added to The Ball, Killing Floor and Audiosurf through Valve's Potato Sack-ARG
Stephany Nunneley-Jackson