Regulus (315-5033) is another iteration of the arcade game Regulus, likely an earlier version or perhaps an alternate build compared to revision 'A'. The '315-5033' code remains an identifier suggesting internal tracking within the development process. More information is needed to determine gameplay features, its developer(s), and its release date or the intended platform.  Without more details, it's difficult to describe the overall appeal of the game.

Regulus (315-5033)

Red Hawk (US)