APERTURE'S HOUR fills the gap between Portal & Half-Life by giving a look at Aperture Laboratories during the Black Mesa Incident and the resulting Seven Hour War. Taking the role of an employee stuck in a testing cycle following GLaDOS' complete takeover on Bring Your Daughter to Work Day, make your way through and escape the now malfunctioning facility.
Here is some work-in-progress content of the first chapter "Observation".
Yes that is an infinite hallway, no that's not final. It has since been changed.
I know this is an old screenshot, but make the hallway semi-circular, that way when you are going down the infinite hallway it will be more realistic.
Oops, double post.