This is Guard Duty. Put your feet in the shoes of Barney Calhoun, a security guard at the Black Mesa Research Facility who has no idea that the next few hours are going to change his life forever. Re-live the exciting adventure of Blue Shift, now re-created in the award winning Source engine.
Hazard Course by EvilGoodGuy.
I would probably add the pipes back underneath unless they're there.
They are there. You can see them if you fullscreen the image and also in the previous image (image to the left of this one).
I <3 the lights