Alpha Fighter / Head On

SEGA partnered with Gremlin industries to release numerous arcade titles during the late 70s and early eighties. Space Attack / Head On belongs to the Dual series of arcade cabinets which offered players an option to play 2 games in one cabinet.

Alpha Fighter is a Space Invaders clone and is almost identical to Taito's classic. The graphics are different (and in full colour), as are the sounds, but the gameplay is otherwise the same. One minor difference is that at the end of the stage, the player has to battle a "mystery" space ship, which floats down to the bottom of the screen in what could be considered a "bonus round".

Head-On is an arcade racing game and the first known game where the player has to collect dots (a year before Pac-Man). Viewed from a top down perspective, the player has to race around a circuit consisting of five lanes and collect all the dots that lies scattered around. At the same time he has to watch out for the jam cars that move in the opposite direction. To dodge the jam cars the player swap lanes which can only be done in the middle of each straight. To move faster it's possible to accelerate but then it's only possible to change one lane at a time. At normal speed two lanes can be crossed in one move. A level is completed when all dots have been collected and when colliding with a jam car a life is lost. The game is over when all three lives are lost. As the player progresses through the levels he will come across more and faster jam cars. In later levels as many as three fast jam cars will be in his way.