怨禍 - 残響の霊屋 -

Feel the tension of exploring a dimly lit Japanese manor as vengeful spirits pursue you.

As you retrace memories of the past, the story of a family's tragedy from fifteen years ago gradually unfolds.

Here, you will discover what the vengeful spirits you feared were like when they were alive—and the feelings they left behind.

Onka: Echoes of the Spirit Prison is a story-driven 3D horror adventure in which you explore a Japanese manor, solve puzzles, and escape vengeful spirits as you retrace memories of a family's past.

■ Explore another realm and solve its puzzles

Explore a Japanese manor haunted by wandering spirits. Collect diaries and clues, and solve puzzles to find your way forward.

■ If they find you, you have to run

Vengeful spirits roam the manor.

If you are spotted, hide or lose your pursuers and escape.

■ Discover who the spirits were in life

Diaries and memories of the past preserve the everyday lives of an older sister and her younger brother, along with the feelings of each family member.

As you learn who they were before becoming vengeful spirits, the circumstances behind the tragedy gradually come to light.

【The Story Begins】

Fifteen years ago, a ten-year-old boy killed his older sister—

Suiren Takahashi, who performs sacred rites in a remote mountain village, heads to the Reioku, a house where vengeful spirits have been sealed away, to renew a seal weakened by the passing years.

At its entrance, however, he is overwhelmed by a powerful spiritual force and dragged alone into another realm.

In the process, the talismans he was carrying are scattered throughout the Reioku.

As he searches for the talismans in the hope of escaping, memories from fifteen years ago begin to unfold before him.

Hatred was not the only thing left within the Reioku.

Why did the boy have to kill his older sister...?

What feelings did the sister and her younger brother carry...?

Now, the seal is broken—

【Game Information】

Title: Onka: Echoes of the Spirit Prison

Genre: 3D horror adventure with exploration and puzzle-solving

Playtime: Approximately 3–5 hours (may vary depending on playstyle, difficulty, and other factors)

Controls: Keyboard and mouse, controller

Number of endings: 1

Difficulty: Easy to moderate (selectable)

【Notices】

〇 The developer accepts no liability for any damages arising from playing or streaming this game.

〇 This game contains frightening scenes and effects. If you have a weak heart, please exercise particular caution. Please refrain from playing if you feel unwell.

〇 This game contains some graphic depictions of violence. Children must obtain permission from a parent or guardian before playing.

〇 Stop playing immediately if you feel unwell in any way during play.

〇 These guidelines may change without prior notice.