> I'm not referring to ripping off ideas... I mean physics/code, sound effects and
> sprites. Like I said, I wouldn't be suprised if there was some bootlegged mslug code
> in there.
Yeah, the behavior looks very much like a direct rip of the Metal Slug 68000 code. Either that or IGS spent a lot of time frame-advancing a videotape of of it.
> PGM has made some good games in the past, but it's puzzling to me why they would be
> so serious in terms of encryption. Their games kind of seem like "budget titles" for
> their time.
IGS's primary business is casino and redemption games, and security is paramount for those. It'd be like if IGT randomly made a fighting game or something.