Analysis of information sources in references of the Wikipedia article "Tomohiro Nishikado" in English language version.
Before you assume it required you to type things in like "Go North" or "Examine Corpse," you should know that Gun Fight was the Halo of its day.
At that time, a game for use in entertainment arcades was considered a hit if it sold 1000 units; sales of Space Invaders topped 300,000 units in Japan and 60,000 units overseas.
As of mid-1981, according to Steve Bloom, author of Video Invaders, more than four billion quarters had been dropped into Space Invaders games around the world
The gameplay of Doom is at its core familiar from the early classics like Space Invaders ... it presents the player with the clear and simple challenge of surviving while shooting everything that moves.
The developers of Halo are aware of their own place in gaming history, and one of them once joked that their game could be seen as "Space Invaders in a tube." The joke contains a double-edged insight: on the one hand, Halo is first and finally about shooting aliens; on the other hand, even the 1978 2-D arcade shooter, Space Invaders, designed by Tomohiro Nishikado for the company Taito, is more interesting than that would suggest.
