Games like Ethereal Abyss
Games like Ethereal Abyss include The Exit 8, Metel - Horror Escape, Lethal Company, Sizeable, and Escape the Backrooms. We matched them by the tags players give Ethereal Abyss on Steam (Exploration, Hidden Object, Puzzle, PvE, and 3D): closest matches first, and among equally close ones the better-known games.

The Exit 8
Shared: Exploration · Puzzle · First-Person

Metel - Horror Escape
Shared: Puzzle · Hidden Object · 3D

Lethal Company
Shared: Exploration · First-Person · PvE

Sizeable
Shared: Hidden Object · Puzzle · Exploration

Escape the Backrooms
Shared: Exploration · Psychological Horror · First-Person

The House of Da Vinci
Shared: Hidden Object · Puzzle · Exploration

Inside the Backrooms
Shared: Puzzle · Exploration · Psychological Horror

Backrooms: Escape Together
Shared: Psychological Horror · Exploration · First-Person

Platform 8
Shared: Puzzle · Hidden Object · Exploration

Poppy Playtime
Shared: Puzzle · First-Person · Psychological Horror

The Outlast Trials
Shared: PvE · First-Person · Psychological Horror

Riven
Shared: Exploration · Puzzle · First-Person

The Room 4: Old Sins
Shared: Puzzle · Hidden Object · Exploration

The Witness
Shared: Exploration · Puzzle · First-Person

Hamster Hunter
Shared: Exploration · 3D · Psychological Horror

Scanner Sombre
Shared: Exploration · First-Person · Psychological Horror

Garten of Banban
Shared: Puzzle · First-Person · Psychological Horror

Left Alone
Shared: Exploration · Puzzle · 3D

Pacify
Shared: Exploration · Psychological Horror · First-Person

PILGRIM
Shared: Exploration · PvE · 3D

Blue Prince
Shared: Exploration · Puzzle · First-Person

Deep Rock Galactic
Shared: PvE · Exploration · First-Person

COCOON
Shared: Exploration · Puzzle · 3D

Subnautica 2
Shared: Exploration · First-Person · Survival