Psychonauts/Challenge markers

Psi Challenge Markers are a culmination of psi cards and a psi core. Once combined, they are quite useful, and can be used to increase the player's rank. Although they are usually only aquired through combining the aforementioned cards and cores, they can occasionally be found in various places within Whispering Rock.

These locations include:
 * The Lodge's roof.
 * The GPO

Psi cards can be found all throughout the campground and the asylum. Psi cores, on the other hand, can only be purchased by the Lodge's Cruller. A total of nine cards and one core must be used to create a marker, a process which can be done at the bottom of Ford Cruller's sanctuary.