This is a very interesting 2-sided tee. Quite different from just plastering stock art onto anything they find, real design actually went into this. The background is somewhat surreal, but done in a 'scratchboard' style with thin lines (as in linescreen type) making up the shaded areas. You've got the checkered pattern ground, sketchy mountains, some rings and even the polygonal bent-paper looking

palm trees, streight out of the game. The Sonic art really stands out here, because he's full-color, while the rest is a muted blue-gray. (it says "Sonic" in small text near him) This shirt is sure to be an interesting point in your collection, if you can find it. It was not common. 

Photo by wavelflack