Vulgus is an arcade game, possibly of Japanese origin, as indicated by the '(Japan?)' notation. Unfortunately, specific historical details, release date, and the developer are currently unavailable.  Without additional context, the exact gameplay is unknown.  The multiple sets (set 1 and set 2) may suggest regional variations, updates, or different versions of the game released over time. More research is required to confirm the production company or organizer.

Vulgus (Japan?)

Vulcan Venture (New)