Portal is a first-person puzzle game. Players must solve physical challenges by opening portals to maneuver objects, and themselves, through the enigmatic Aperture Science Laboratories.
Ten of Portal's hazard icons, exported from the game and into PNG format.
Great for avatars, but not so much sprays given their size.
These aren't all of the icons: some didn't make sense on their own, or were just a bit rubbish. The important ones are all accounted for though.