While the word "Metroidvania" is commonly used presently to describe games in this genre, or games that have elements of this genre, the origins of the term are unclear; Igarashi notes that he did not coin the phrase, though grateful for the invention of the term.[12] Igarashi noted that with Symphony of the Night the goal was to have exploration closer to the top-down Zelda approach, but with the side-scrolling nature, it was compared more to Metroid, and believes this is how the portmanteau came about.[13] [13][14] A similar portmanteau "Castleroid" is sometimes used as well for describing this genre.[13] Video game journalist Jeremy Parish, who manages the Metroidvania.com site that has attempted to catalog all known Metroidvania games,[10] acknowledges he helped to popularized the term but had learned it from his former co-worker at 1UP.com, Scott Sharkey, who had used the term to describe the games in the Castlevania series that had adopted some elements from the Metroid series.[15]