Back at the turn of the century, unemployed programmer Toshiaki Fujino was presented with an opportunity that seemed too good to be true: having quit Konami and formed the independent studio Triangle Service with the intent of pursuing his own game ideas, and with funds running low, they stumbled over an ad specifically recruiting arcade shooting game programmers—even twenty years ago, the golden age of arcade STG was long over and the odds of finding employment doing such specialised work were extremely low, so Fujino jumped at the chance to not only secure the job but to also sell them on the game concept that Konami had knocked back, and that he'd been unsuccessfully shopping since he went solo.

Of course, it turned out to be too good to be true: this job was essentially a subcontracting gig for the ramshackle Korean company Oriental Soft, who ended up stiffing Fujino & co. (a composer pal who'd also worked at Konami, as well as an artist acquaintance) on months of pay and releasing their unfinished, "cancelled" game to arcades as G-Stream 2020, a game most famous for being distributed on such shoddy hardware that multiple boards were melted in the process of trying to dump the ROMs. Throwing caution to the wind, Fujino hurriedly remixed his work into a new game, XII Stag, which he was able to release later that year in arcades via Taito's PlayStation-based G-NET hardware. (Only three STG were released in arcades that year: G-Stream 2020, XII STAG and a little game called DoDonPachi Dai Ou Jou.)

Fujino's helpfully listed all the international store links, have fun https://triangleservice.co.jp/cs/dz/