2014 · Shooter · Platform · Puzzle · PC (Microsoft Windows)
Cosmogony is a 6 part map pack created by DRey taking place during GLaDOS activation in the Enrichment Center. You are one of the few survivors of the neurotoxin disaster and with some help, you try to find a way out of Aperture. The map pack features custom content, a story deeply immersed in the Portal and Half-Life universe and more.