Strange symbol in LGuk Assassin Room barrels

[t0lkien]

I found this strange little Half-Life like symbol in the green goo texture inside the barrels in the Assassin's room in LGuk. Valve easter egg?

http://i64.photobucket.com/albums/h162/t0lkien/symbol_zpscc045743.jpg

[LiQuid]

http://i.imgur.com/2ZUdLaY.png
http://i.imgur.com/BMRk6IC.jpg

[DOPE]

Half-Life 3 confirmed.

[Gadwen]

http://pixelsmashers.com/wordpress/wp-content/uploads/2011/02/gabe-newell-interview-trolls.jpg

[gortimer]

You just found James hallidays Easter egg

[Sadre Spinegnawer]

twerkin it

[runlvlzero]

Illuminati

[Flamewraith]

Illuminati