Half Life: Blue Shift Easter Egg - The "Gearbox"

There's a moment in the game where you fall from a vent access into a little room. It's a little bit before you meet Harold. When you get out from this little room, go left and go downstairs near the pile of some wreckage. If you look around in that room, you'll find an opened box with gears inside. This is in fact an eye blink about the development team's name : "Gearbox".