Like the guy said it looks more like a reboot than a proper sequel.
Anyway, great find!!! it's amazing it's been lost for so long and it's only resurfacing now.
BITD what I found really cool in Vigilante was that you had to rescue "Madonna" (from the skinheads!).
(Now I understand it's just supposed to be the firstname of your girlfriend, but back then I thought you had to rescue the "real" Madonna.
So I found the "interaction" of the real world coming inside a video game just awesome!
Madonna was the s**t back then, it was simply the coolest girl to save in the whole universe.