This mod does not have a linear story, many maps connect to one another as they would in real life. This mod also ties together Portal - Prelude, Portal, and Portal 2. An understanding of all three stories may be required to be able to follow this story.
The story Takes place between Portal and Portal 2 and reveals the reason for many of the surprising differences between Portal 1 and 2
This mod is not solely an fps or a portal challenge, you will find and lose tools and weapons ultimately relying on logic, physics, and Aperture supplied science to progress.
This mod (taking place entirely in the Aperture "super-center") includes the Aperture-built city, head-quarters, research center, laboratories, storage facility, residential block, and the enrichment center/human research center
Release date is some time around Christmas this year, but I expect the final release (not the beta) would be sometime next early spring.
-The final version would have all voice acting in place, be fully optimized, all custom models fixed and correctly implemented, all maps compiled in full HDR, and all custom textures in high quality and fine tuned normals and specular.
*Robots can't forget, you say? The story will explain.