I was going to write how the best best Metal Gear game, Metal Gear Acid 2, isn't playable on a modern platform, but that'll just invite more emulation comments. So, instead I thought I'd show another cool thing it pioneered.
Copies of the game came with "Solid Eye" technology. Essentially, the cardboard fixture that wrapped around your PSP is the precursor to Google Cardboard VR, which would release 9 whole years later.
What could you do with this tech? Why, you could be a creepy lil weirdo, of course. It IS a Kojima game.

