B. CASTLEVANIA: SYMPHONY OF THE NIGHT
This game can be unlocked by getting the Original Game Icon in the area before
the normal boss in Stage 3'.
First, you got to have a subweapon that can hit upwards, like an Axe or
Grimoire. Basically anything that can hit something above you is ideal. You
can find some subweapons at the very start of Stage 3' by pushing the white
tombstone just above you to the left. This will reveal a secret room that
contains several subweapons, so be sure to avoid dying along the way to keep
it until your destination.
Find the area with a plant platform that is hanging above with a Bone Dragon
near it. You must hit that plant to lower itself, so you can use it to raise
yourself and walk through the platforms above. Jump carefully and head to the
right until you find a tombstone at the end of the platforms. Destroy that
tombstone to reveal the game icon for Symphony of the Night. Getting it will
now let you play the sequel to the story of Rondo of Blood. It will be
available at the "Original Game" menu.