ɪnˈɪʃəli dɪvˈɛləpt fɚðə pˌiːsˈiː ˈeɪt θˈaʊzənd ˈeɪthˈʌndɹɪd sˈɪɹiz baɪ mˈæseɪə hˌæʃɪmˈoʊɾoʊ dᵻɹˈɛktɚ, pɹˈoʊɡɹæmɚ, dɪzˈaɪnɚ ænd tˌɑːmɔɪˈoʊʃi mˌɪjɐzˈæki sənˈæɹiˌoʊ ɹˈaɪɾɚ, ðə ɡˈeɪm wʌz sˈuːn pˈoːɹɾᵻd tə ðə ʃˈɑːɹp ˈɛks wˈʌn, pˌiːsˈiː nˈaɪnti ˈeɪt, ˌɛfˈɛm sˈɛvən, ænd ˌɛmˌɛsˈɛks tˈuː dʒˌæpənˈiːz kəmpjˈuːɾɚ sˈɪstəmz.
Initially developed for the PC-8800 series by Masaya Hashimoto (director, programmer, designer) and Tomoyoshi Miyazaki (scenario writer), the game was soon ported to the Sharp X1, PC-98, FM-7, and MSX2 Japanese computer systems.