Wowie! The forces of the Combine return yet again, except now they look different!!!
Normal Overwatch troopers and prisonguards are now Opposing Force 2 synths with the blue hunter texture. The Elites have a regal Lavender color scheme originally meant for Adviser guards- and it still can be, if you're a bit of a roleplayer.
If you want to pretend more easily that your alien invaders are in fact invaders from another world, use this to replace their voices.
Also works well with my other skin here which gives the...vehicle synths(?) a palette swap, too.