timppu: I have been looking for certain DOS vertical shooter, probably from early 90s (like 1990-1994 or so). Too bad I remember so little about it, but the most distinctive thing was that it was very much like japanese shooters, ie. big explosions, big guns etc. Could be even that it was indeed made by a japanese company. The graphics and scrolling were not completely smooth, a bit jerky, but still very playable game.
Most western made PC vertical shooters of the time were rather slow and not quite as flashy in comparison, like Xenon 2 (ok it's quite flashy :)), Raptor, Tyrian etc.
I've been looking for it in mobygames etc. without success. Anyway I think I played it around 1991-1992, just before the Doom graze (because after Doom appeared, I didn't play much of anything else but it for a year or two. :)). Too bad about vague memories