Play as Maria (Rondo of Blood) 
     In  Stage  2,  while  the minotaur is chasing Richter, there is a
candlestick  that  contains  the "key" subweapon. Make sure to get it,
and then proceed down into the sewers after the minotaur is blocked by
the  wall.  At the very end of the sewer path, there is a locked door.
Use the key subweapon and it will unlock, giving you a cinematic scene
where  Maria  joins  Richter.  She  is  now  selectable  as a playable
character in the main menu.


Unlock Symphony of the Night 
     In  Stage  2,  while the minotaur is chasing Richter, immediately
fall  into the first hole in the ground. You will not die, but instead
be  taken  into the sewers. Play the level out normally and defeat the
boss.  Afterwards,  you  will  be taken to Stage 3' (this is different
from the normal Stage 3!).

     In  Stage  3', whenever the path branches, taken the upper route.
Make  sure  you  obtain the "axe" subweapon sometime during the stage.
Eventually, you will meet a skeletal snake that is attached to a wall.
Nearby  is a vine-like cage; use the axe to cut it. It now serves as a
platform  for  Richter to jump to the upper ledges. Continue along the
upper  ledges  until you see a breakable tombstone. Inside is the item
that  unlocks  Symphony  of the Night. Return to the main menu to play
it.


Unlock Original Rondo of Blood game
Go to stage 4.
     On  your  way through twards the end of the stage you will find 6
of those skulls that spit fire stacked on top of each other. Just past
them  is  a  platform that moves like an inverted pengelium going left
and  right.  Just opposite of it is a spiked ball. Get on the platform
and  jump over the spiked ball landing on the ground against the wall.
Break  the  lower  part  of  the  wall to find a bomb. Hit the bomb to
ingite it and the wall will come falling down.
     Walk  forward a bit and you will find 2 spiked platforms that try
to  crush you. Get on the right platform and as it's going up jump off
of  it  and land on the upper level. Stay on top avoiding the axes and
the  yellow  eye.  At the very end of that platform is a candle hit it
and inside will be some classic gaming goodness.


Original game Akoumajou Dracula Peke
     The  original  game  "Peke" was introduced in the original Chi No
Rondo as a bonus game if you used the wrong System Card.

This is the third original game that can be unlocked.
First, you need to select NORMAL BOSS RUSH mode.
Beat it two times, you will receive two Sound Discs.
The third time fight until you defeat Shaft and defeat the next boss, 
at the end of the fight you should be rewarded with original game "Peke".
Access it from the main screen like the other original games.
I advice to use Maria and her Dragon sub-weapon to fastly defeat 
the bosses.


Unlock Boss Rush Normal, Boss Rush Dash, and Full Bosh Rush
     To  unlock  BRN,  beat  the  first  boss  on every stage (Wyvern,
Werewolf, Minotaur, Dullahan, Death, Shaft, and L. Vampire).
     To  unlock  Dash, beat the secondary boss on each stage (Serpent,
B. Golem, Dogether, Carmilla, Hydra, Shaft, Shaft Ghost).
Beat every boss (including Dracula) to unlock Full boss rush

Unlockable:         How to Unlock:

Boss rush normal    Beat the primary boss on each stage

Boss rush dash      Beat the secondary boss on each stage

Full boss rush      Beat every boss (including Dracula).