Castlevania: Symphony of the Night Guide
While Symphony of the Night has a fair share of RPG elements which are covered within, this guide also features an interactive map. In addition, there is a Walkthrough designed to earn you every hidden item in the game with a minimum of backtracking.
This guide is based on the original PlayStation version of the game, though it applies equally well to the Xbox 360 release. Several hidden items (and two new familiars) are found in different places in the PSP Dracula X Chronicles version. I have noted these changes on the appropriate pages.
A step-by-step walkthrough to find and explore every nook and cranny in the game, with minimal backtracking.