This poster for Sonic 1 has a bold claim right at the top. It says "The Best Game Ever". So, naturally this is a type of ad poster. It has 3 screen shots to show off the graphics. It says "Sonic is the new hero for the Sega Megadrive System." The info at the bottom is ''Virgin Mastertronic LTD, 16 Portland Road, London W11 4LA Tel: 071 727 8070'' . It seems likely that it was for stores, however it makes a great wall decoration with the large art.