Hard Difficulty
Finish the game with Reinhardt or Carrie. Save your game and select a new, previously unaccessible HARD difficulty mode.
Cool tunes
Put the Castlevania: Symphony of the Night CD into an audio CD player. Go to the second track to hear a hidden song.
Extra Options
At the name select screen, enter your name as AXELORD then go to the Settings screen
How to get the Crissaegrim
First, you must go to the inverted castle. From there, go to the Forbidden Library. There you will encounter some enemies called Schomoo. Those things sometimes drop Ramen and they rarely drop the most powerful sword in the game, the Crissaedrim.
Play as Richter - Japanese and American
After beating the game once, start a new game and enter your name as RICHTER. You can play now as Richter Belmont.
Second Quest
There is a second quest in this game that players may over look. Do the following steps to get access to the second quest.
Get the Spike Buster armor in the Catacombs by turning into a bat and using your radar to negotiate the "Dark Spiked Tunnel".
Go to the "Royal Chapel", equip the Spike Buster armor and run through the hallway of spikes. After the hallway, Maria will give you a Green Ring.
Use the Green Ring in the center of the Castle at the Clock Tower.
You will quickly be given a second quest.
Special Sword Attack
In order to this you must equip any of these three swords: the Alucard Sword, Jade Katana and Katana Blade. Just press down, front twice and then press circle or square. Alucard will have a mirage that will attack at the back of the enemy, Alucard is also invulnerable in doing this attack.
Summon the Skeleton Warriors
In order to Summon the skeleton warriors you must equip the Sword of Dawn, then press down, front twice and then press square or circle. A flash of light will release in the sword and there emerge many types of skeleton warriors, such as mages, spearmen, swordsmen and archers.They will help you in battle for a short time ,but you can summon them anytime you want.