Easter Eggs & Fun Details

Meryl's Codec Frequency

To find Meryl's Codec frequency, you need to examine the back of the game's physical CD case (or the digital manual). This clever fourth-wall break was a unique puzzle for players. The frequency is 140.15. Calling her is essential for progressing the story at a certain point.

Psycho Mantis's Mind Reading

As mentioned in the boss guide, Psycho Mantis will read your memory card and comment on other Konami games you've played, such as Castlevania: Symphony of the Night or Policenauts. This is a fantastic and memorable easter egg that adds to his unique character.

Hidden Photos in Otacon's Lab

In Otacon's lab, if you look closely at his computer screen, you can see various photos. Some are of real-life models, while others are of characters from other Konami games. This is a subtle nod to the broader Konami universe and a fun detail for observant players.