Although it was released alone, and well after 1999, Halloween '99 was originally intended
 to be the first of an annual game series from Bigboned. A side-scrolling Action Platformer in which Aliens invade Earth, Halloween '99 puts you in the shoes of Kyle, as he brings down the aliens using nothing but tactical fighting. A little short, but a very fun game to play using a neat little arcade-like fighting engine. Definitely worth checking out.