| see Snake's ugly face close by. |

Guide your way through Metal Gear's encounter with Meryl under Psycho Mantis's control. Learn how to knock her out and prepare for the psychic boss battle.

Alright, so after that last bit, you'll head into the next room. It looks empty at first, but Meryl's still tagging along, acting a little strange. Stick around for a bit, and she'll suddenly point her gun right at Snake in the middle of the screen. Get ready for a cutscene.

During the scene, Meryl starts asking Snake some odd questions while waving her gun around. Snake, though, notices something weird – a distortion behind her. He figures out someone's messing with her. Meryl then gets ready to shoot Snake, and the perspective shifts back to him. The Colonel will radio in, begging you not to shoot Meryl, explaining she's being controlled through music.

This is your cue! You absolutely must knock Meryl out by punching her. Seriously, don't shoot her at all. Just keep wailing on her until she passes out. Once that's done, the person controlling Meryl finally shows themselves: Psycho Mantis, the psychic from Foxhound.

Psycho Mantis challenges Snake to a fight, boasting that he can read Snake's every move. He even proves it by revealing some of Snake's memories and scanning your memory card for other Konami game saves, commenting on them if he finds any. After a bit more back-and-forth, it's time for the boss fight.