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I checked a couple of such games and found only ONE which is exactly how I would like my own game to be like.
Anyway, good luck, and do not forget to come back here after few months and tell us how it worked out (it sounds very exciting, starting a game as an investor only).
i'm interested too in purchasing a working, good script, but it costs a lot, it has to be something original, and the advertising for it would cost a lot too