In the early 1980's an Arcade game released by Williams Electronics was to become one of the most important titles of the golden age of video arcade games selling over 55,000 units. That game was Defender; a side scrolling shooter, featuring 2D graphics as you defend astronauts against wave after wave of alien enemies. So what if you have that classic 1980's game but mixed up with a bit of Halloween fun? Probably this game 'Sybil'. A brand new Commodore Amiga game by Colin Vella in which he states "Halloween Defender is inspired from the classic game Defender, but with a Halloween theme ".