How about this easter egg.
When you first start, and the guy Marsh gives you your pistol. Use noclip, walk through the wall with the glass he's standing behind and disable the security by clicking on the button on the monitor in the front. Watch out the window as an imp scales the wall and goes into the ceiling. You have a moment long enough that you can walk back through the wall and watch. Also, Marsh won't talk to you, if you try he just looks at you. I dunno, thought it was pretty funny and haven't seen it posted yet.
I saved a demofile but I've done it a few times - so it doesn't need a demo to be verified.
When you first start, and the guy Marsh gives you your pistol. Use noclip, walk through the wall with the glass he's standing behind and disable the security by clicking on the button on the monitor in the front. Watch out the window as an imp scales the wall and goes into the ceiling. You have a moment long enough that you can walk back through the wall and watch. Also, Marsh won't talk to you, if you try he just looks at you. I dunno, thought it was pretty funny and haven't seen it posted yet.
I saved a demofile but I've done it a few times - so it doesn't need a demo to be verified.