A mysterious coin (or secret coin) is a non-interactive object that appears in several maps across Tyria, including several known to be designed by Josh Foreman. The coins appear to be inscribed with the New Krytan letters for J C F, i.e. the designer's initials.  
- ^ Josh Foreman, posting in March 2013 on Reddit as Ragged_Scrybe, "I made those little coins to put in places where people might think they've gone world-out, just to assure them that I like them scrambling all over everything like rambunctious kids."
- ^ Players speculating about the "coins" on the official forums.