
Alfa System is a less known Japanese developer that has been active from 1988 to this day. Alfa System famously ported Street Fighter as a launch title for the PC Engine CD in 1988, making it the first CD-ROM game ever released. They also made the great shooter Cyber Core for the PC Engine, as well as the fun foul-mouthed cyberpunk shooter 'Down Load', and the R-type-inspired 'Sinistron'.

Cyber Core
PC Engine 1990@2586
ocdgamer.rb:383:output_game_list(
6 games, mode:largescreen, tag id:737, sortby:system,
url_arg_prefix:, output_list_selection:true)
output_large_game_box(2866)
output_large_game_box(2586)
output_large_game_box(2878)
...
execution time:
output_game_list: 0.00s