Metal Gear Solid: Psycho Mantis Reads Your Memory Card

In 1998, Psycho Mantis delivered one of the most technically ambitious boss fights in gaming history — not through combat mechanics, but through fourth wall demolition. Before the fight begins, he reads the contents of your PlayStation memory card and names other Konami games you have saved on it.

If you had saves from Castlevania: Symphony of the Night, Suikoden, or other Konami titles, Mantis would call them out by name. He would then make the controller vibrate, seemingly by telekinesis, while explaining he is demonstrating his power. He called it ‘moving things with the power of his mind.’

The fight itself cannot be won through normal means — Mantis counters every move because he ‘reads your thoughts through the controller.’ The solution is to unplug the DualShock from Port 1 and plug it into Port 2, breaking his read on your inputs. No game had ever required a player to physically rewire their controller to win a boss fight.

Snake’s commanding officer Colonel Campbell even breaks character during the fight, encouraging you to try a different controller port — framing real-world hardware manipulation as tactical advice. Psycho Mantis remains the gold standard for boss design that treats the player’s actual hardware as part of the arena.