Initially, Symphony of the Night sold modestly, in part due to the industry's shift toward 3D and a perceived lack of marketing from Konami. However, those who played it spread the word.
The term "ISO" refers to a digital disc image file format that contains an exact copy of the data from an optical disc, like a PlayStation CD-ROM. In the context of retro gaming, an ISO is the essential tool for playing classic games from physical media on modern hardware. Castlevania Symphony Of The Night -iso-