Kreuzfeuer was a german Prototype game which we realeased in 1983 potentially a copy of Cross Force
It seams to be quite common for developers and publishers to releases games with different titles in regions. This game apperars to be a german verison of the game Cross Force. In the intriguing Cross Force, players control a pair of cannons which remain at diametrically opposite ends of the screen at all times (if centered, the two cannons line up vertically; moving them toward the edges of the screen splits them apart diagonally).