No, illegal rom sites can also end in .com If you want to transfer your legal copy of Metal Slug to your computer, and the only way to do that is by dumping ROMs from the cart. It requires special hardware that is extremely costly, not to mentionthat you really need to know what you are doing with it. So to reiterate, if you don't know what your supposed to do, have little money and zero tech skills, don't bother. Although this is hardly the answer you want, the easiest way is to simply download the game illegally from some site and then play that on an emulator. If you own the actual game, you should just play it as is, and not on the computer if you ask me.