The Dark Realm has been an important side quest in each Onimusha game. Each realm made up a real challenge for each game, with a worthwhile reward at the end of each, for those who could pass the test. In Onimusha: Warlords, the player had to lead Samanosuke Akechi through one realm, consisting of 20 levels, in which you had to defeat each horde of enemies, progressing further and further and fighting harder enemies, until you finally reached the bottom and claimed a worthwhile prize.

At the last dark realm in Onimusha 3: Demon Seige you will get the Ultimate whip for Jacques. And the Bishamon sword for Samanosuke both of this item is a must get if want to aim for perfection. For a easy way out get Ako black vest it will surely be very useful in the dark realm.

Dark Realm 1 - Jacques - Sea Temple (5 rooms)

Location

This realm is found in the area behind the yellow door, which is immediately Acessible from the central room of the Sea Temple. Go to the second floor library via the elevator and find the hanging man in the hallway beyond, before the earth door.

Acess

You can Acess this realm when Jacques enters the yellow door in the Sea Temple for the first time, and can Acess it until Jacques fights Gertrude, the two headed monster.

Items

The following items can be found within this dark realm:
- soul shrine
- thunder seal
- secret medicine

Dark Realm 1 - Samanosuke - Sea Temple (6 rooms)

Location

This realm is found in the area behind the yellow door, which is immediately Acessible from the central room of the Sea Temple. Go to the second floor library via the elevator and find the hanging man in the hallway beyond, before the earth door.

Acess

You can Acess this when Samanosuke is able to enter the yellow door after Jacques installs the power crystal in the past, enabling Samanosuke to use the elevator. It can be Acessed until Samanosuke enters the room where Jacques fought Gertrude in the past.

Items

The following items can be found within this dark realm:
- soul shrine (1)
- orb (wind seal)
- secret medicine (1 on 2nd playthrough)

Dark Realm 2 - Jacques - Mont-St.-Michel (12 rooms)

Location

This is found in the long stairway that connects the bottom of the area with the top, in the door near the top of the stairway.

Acess

You can Acess this one after Jacques places the Red Eye Crystal in the dragon statue at the top of the stairs and completes the tile puzzle, thereby raising the stairs. It can be Acessed until Jacques goes to the basement behind the side door in the monastery's main chapel, where he encounters the gas trap.

Items

The following items can be found within this dark realm:
- medicine (2)
- soul shrine (2)
- green orb (1) (used by Samanosuke to open green mist chest)
- wood charm (1) (need purple orb to open)
- orb (fire seal)
- oni med lv 2 (1 on 2nd playthrough)

Dark Realm 2 - Samanosuke - Mont-St.-Michel (20 rooms)

Location

This is found in the long stairway that connects the bottom of the area with the top, in the door near the top of the stairway.

Acess

You can Acess this immediately after Jacques opens the area by raising the stairway. You can Acess this until after you help Jacques get out of the trap, when Samanosuke fights all the way back to where he began and exits through the main gate to fight Gertrude.

Items

The following items can be found within this dark realm:
- medicine (3)
- soul shrine (4)
- purple orb (1) (used by Jacques to open purple mist chest)
- wood charm (1) (need green orb to open)
- purple vest (1)

Dark Realm 3 - Jacques - Honnoji Temple (20 rooms)

Location

This is found underneath the upper deck of the main temple, near the save point, on your second visit to Honnoji Temple, just before Jacques fights Nobunag You can clearly see the old man hanging down.

Acess

Since this is right before Jacques' final fight with Nobunaga, this is the only time you can Acess this realm.

Items

The following items can be found within this dark realm:
- medicine (1)
- secret medicine (2)
- soul shrine (2)
- blue orb (8) (Used to open the blue mist chest)
- ultimate whip