Sentences written about this title, gathered by type from the Japanese and English Wikipedia articles (as of 2026-8-30).
In 2004 a remake was released as the 1st title in the Sega Ages 2500 series.
The port places weight on reproducing the arcade version, with screen scrolling and 2-player simultaneous play among its features.
In the "Cross Review" feature of the magazine Famitsu,the game scored a total of 24 out of 40. In the "Game Report Card" reader poll run by Family Computer Magazine,it scored 16.64 out of 30, as shown below.
The Master System version of the game was reviewed in Console XS magazine, which gave it an 85% score.
The original arcade version of the game was reviewed in the July 1987 issue of Computer and Video Games, where Clare Edgeley described it as "one of the most gripping games" she "played in months", praising the Aliens-like horror atmosphere, chilling sounds, special effects, graphics and gameplay.
She stated it was "the first time the atmosphere and sheer addictiveness of a shoot 'em up has transported me to another planet," and concluded that it "is fantastic".
Released on 1988-12-2 by Sunsoft; the version outside Japan was released by Tengen.
A sequel developed by Totally Games for the PlayStation Portable and Wii, released on 2007-7-24 and not released in Japan.
It was ported to various home computers and consoles, including Sega's own Master System, becoming one of the best-selling titles for that console.
The original arcade version of the game was reviewed in the July 1987 issue of Computer and Video Games, where Clare Edgeley described it as "one of the most gripping games" she "played in months", praising the Aliens-like horror atmosphere, chilling sounds, special effects, graphics and gameplay.
She stated it was "the first time the atmosphere and sheer addictiveness of a shoot 'em up has transported me to another planet," and concluded that it "is fantastic".
The game was also converted to polygonal graphics for the PlayStation 2 as part of the Sega Ages re-release program and included in the US version of the Sega Classics Collection (it was removed from the European version to receive a lower age certificate).
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