During the fight with Psycho Mantis, the player is intended to swap their controller to the second port to prevent Psycho Mantis from reading their mind. However, if you call Campbell after losing to Psycho Mantis enough times, Campbell and Naomi will reveal that the statues in the room are based on Mantis himself, and attacking the statues will distract him long enough to be attacked. This alternate strategy was implemented in case the second controller port of the PlayStation is damaged, although this strategy was not included in Metal Gear Solid: The Twin Snakes on the GameCube.