3 points
One of the most famous moments of Metal Gear Solid is an anti-piracy measure.
1 point
You talking about the radio frequency to contact Marrow? Not much for anti piracy, really. If you called Colonel Campbell three times total, her frequency was added to your saved frequency list.
1 point
Ah, I never knew that. But even that was a callback to them using a very similar trick in the old MSX games as anti-piracy. (Meryl, btw.)
1 point