For Halloween 2009, my costume was the BLU Engineer from Team Fortress 2.
The goal.
Hard hat and safety glasses. I was unable to find proper goggles.
The glove. The silver stripes were created with duct tape.
The wrench, created with two dowel rods and a block of styrofoam cut into three shapes, wrapped with black duct tape.
A close-up of the wrench.
Shirt and overalls. The patches on the shoulder are paper, stapled to the shirt, as I didn't want to permanently modify this shirt.
Knee pads and boots.
The utility belt. I need to find one with a clasp in the middle, rather than at the side.
I even changed my phone to be BLU-themed.