Gibson has two video-game themed masks, although he seems to only have worn one so far.
The artist for both masks is David Gunnarsson.
Gunnarsson unveiled the Pac-Man mask in July. Then a couple weeks ago a Space Invaders mask was also announced, but it doesn't seem that one has been worn in-game yet.
Here is discussion of the Pac-Man mask.
Here is the discussion of the Space Invaders mask from later October. There are no in-game photos of this one yet.
On the left and right sides, the classic, pixelated space invaders are moving side to side, with the invaders attempting to be shot down with the “core cannon”.
On the top of the mask is where things start to get really interesting. Gunnarsson calls the character “The Alien Duck" on the top of the mask…. inspired by a certain Alien from a certain Alien movie, an Alien with a mouth in the mouth… or more precise a beak in the beak!” Pretty scary if you ask us!