Here, go to 1:24 and you will notice the monitor screens have HL2 monitor textures :\
wut ze hell?
They look similar, but are not the same...
Yes, they are.
For example, the reactor(wut) orange panel to the right is similar, if not the same. And the center screen blue thing with the red triangle is exactly the same.
No they are not.
I'll whip up an image then.
Fine, you do that!!!
I rest mah case.
The others are the same too, but I really can't be bothered to browse the texture list thingy.