Games like Small Town Detective
Games like Small Town Detective include Monument Valley 2, Planet of Lana, Pikuniku, Ori and the Will of the Wisps, and Kao the Kangaroo: Round 2 (2003 re-release). We matched them by the tags players give Small Town Detective on Steam (Action, Casual, Atmospheric, Strategy, and Platformer): closest matches first, and among equally close ones the better-known games.

Monument Valley 2
Shared: Casual · Action · Strategy

Planet of Lana
Shared: Action · Atmospheric · Puzzle

Pikuniku
Shared: Casual · Action · Puzzle

Ori and the Will of the Wisps
Shared: Action · Platformer · Atmospheric

Kao the Kangaroo: Round 2 (2003 re-release)
Shared: Action · Casual · Platformer

LIMBO
Shared: Platformer · Atmospheric · Puzzle

Bloons TD 6
Shared: Strategy · Casual · 3D

Portal 2
Shared: Platformer · Puzzle · Action

The Room
Shared: Atmospheric · Puzzle · Point & Click

Unravel
Shared: Action · Atmospheric · Puzzle

Never Alone (Kisima Ingitchuna)
Shared: Atmospheric · Platformer · Puzzle

Deadlight
Shared: Action · Platformer · Atmospheric

Gorogoa
Shared: Puzzle · Atmospheric · Casual

Machinarium
Shared: Point & Click · Puzzle · Atmospheric

Portal
Shared: Puzzle · 3D Platformer · Action

Pinstripe
Shared: Casual · Atmospheric · Platformer

A Story About My Uncle
Shared: Atmospheric · Platformer · Casual

Is This Seat Taken?
Shared: Casual · Puzzle · Cute

Toki Tori
Shared: Casual · Puzzle · Platformer

BEEP
Shared: Platformer · Action · Casual

Mark of the Ninja
Shared: Platformer · Action · Atmospheric

Moncage
Shared: Casual · Puzzle · Atmospheric

The Pedestrian
Shared: Puzzle · Atmospheric · Platformer

Pumpkin Jack
Shared: Action · 3D Platformer · Atmospheric