Games like Apparitions: Kotsmine Hills
Games like Apparitions: Kotsmine Hills include The Room, Firework, Hidden Folks, The Room Two, and The Room 4: Old Sins. We matched them by the tags players give Apparitions: Kotsmine Hills on Steam (Casual, Hidden Object, Mystery, Puzzle, and 2D): closest matches first, and among equally close ones the better-known games.

The Room
Shared: Mystery · Puzzle · Hidden Object

Firework
Shared: Puzzle · Mystery · 2D

Hidden Folks
Shared: Casual · Hidden Object · Puzzle

The Room Two
Shared: Mystery · Puzzle · Hidden Object

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

Paper Bride
Shared: Puzzle · Mystery · 2D

Zup! S
Shared: Casual · Puzzle · 2D

Peggle Deluxe
Shared: Casual · Puzzle · 2D

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

Boxes: Lost Fragments
Shared: Mystery · Puzzle · Casual

The Room Three
Shared: Mystery · Puzzle · Hidden Object

Adam Wolfe
Shared: Casual · Hidden Object · Puzzle

Gorogoa
Shared: Puzzle · Casual · Singleplayer

Hidden Through Time
Shared: Casual · Hidden Object · Puzzle

Whisper of the House
Shared: Casual · Hidden Object · Puzzle

Enigmatis 3: The Shadow of Karkhala
Shared: Casual · Hidden Object · Puzzle

9 Clues: The Secret of Serpent Creek
Shared: Casual · Hidden Object · Puzzle

Storyteller
Shared: Puzzle · 2D · Casual

Frankenstein: Master of Death
Shared: Hidden Object · Casual · Puzzle

Plants vs. Zombies GOTY Edition
Shared: Casual · Singleplayer · 2D

Enigmatis 2: The Mists of Ravenwood
Shared: Hidden Object · Casual · Puzzle

Enigmatis: The Ghosts of Maple Creek
Shared: Hidden Object · Casual · Puzzle

A Little to the Left
Shared: Puzzle · Casual · Singleplayer

Morphopolis
Shared: Hidden Object · Puzzle · Casual