As you can see, this shirt is streight from Top Heavy Clothing.
If you like it, go there and buy it right away (they change their selection on their website as new designs appear!) at www.topheavyclothing.com. This is a smaller size shirt, and is related to another design (Circuit Sonic) but brings the entire background into play, and reduces the color design size. It is actually a rather trendy looking design, and uses the gunner turret robot (which came with the recent Toy Island Action Figures Mega-Bots Line) as part of the design.