Silkworm

Silk Worm is a horizontally scrolling shoot em up that incorporates ground based combat alongside aerial action. A cooperative element is present, where one player controls a helicopter and another can join using a jeep, requiring mutual protection.

Throughout the game, destroying a specific number of enemies causes a special helicopter, referred to as a "goose", to appear. Defeating this target rewards players with a weapon powerup, a recurring event that can even happen during boss confrontations.