I got a Gun Survivor 2 cart but I am not able to make it boot up, since long time I know that this game need a special namco bios or naomi setting (maybe it needs a first naomi version like HOTD2).
Is there anyone able to help me about this metter and maybe can give me more infos about the bios and naomi version?
The old owner of this cart I got says that he has a bios 21331 inside the naomi he used for the game test...seems to me strange this is possible