Games like Octave
Games like Octave include CARRION, Fran Bow, Granny: Chapter Two, Lucius, and Samsara Room. We matched them by the tags players give Octave on Steam (Indie, Adventure, Gore, Violent, and Horror): closest matches first, and among equally close ones the better-known games.

CARRION
Shared: Gore · Indie · Horror

Fran Bow
Shared: Adventure · Point & Click · Indie

Granny: Chapter Two
Shared: Adventure · Indie · Gore

Lucius
Shared: Adventure · Horror · Gore

Samsara Room
Shared: Indie · Adventure · Point & Click

CAYNE
Shared: Adventure · Indie · Horror

Bad Dream: Fever
Shared: Indie · Adventure · Point & Click

Kindergarten 2
Shared: Adventure · Gore · Indie

The Room
Shared: Adventure · Point & Click · Indie

Detention
Shared: Indie · Horror · Adventure

The Room Two
Shared: Point & Click · Adventure · Indie

The White Door
Shared: Indie · Adventure · Point & Click

Rusty Lake Paradise
Shared: Indie · Adventure · Point & Click

Bad Dream: Coma
Shared: Adventure · Point & Click · Horror

Blasphemous
Shared: Gore · Indie · Violent

FAITH: The Unholy Trinity
Shared: Indie · Horror · Gore

Blair Witch
Shared: Adventure · Indie · Horror

Neverending Nightmares
Shared: Indie · Horror · Gore

Dead by Daylight
Shared: Horror · Gore · Violent

The Beast Inside
Shared: Adventure · Horror · Indie

[Chillas Art] Night Delivery
Shared: Indie · Adventure · Horror

[Chillas Art] Aka Manto
Shared: Indie · Horror · Gore

Unforgiving - A Northern Hymn
Shared: Indie · Adventure · Horror

Home Sweet Home
Shared: Adventure · Gore · Indie