Vulgus is an arcade game, with 'set 2' indicating this is a different version of the game from 'set 1'. Further information is needed to determine its full history, release date, and developer.  The gameplay mechanics and the company responsible for its production remain unknown without more details. The existence of multiple sets implies variations or revisions of the game.

Vulgus (set 2)

Vulcan Venture (Oldest)