Games like Nightwatch Protocol
Games like Nightwatch Protocol include The Room, The Room Two, The Room Three, Platform 8, and The Room 4: Old Sins. We matched them by the tags players give Nightwatch Protocol on Steam (Simulation, Adventure, Point & Click, Puzzle, and Immersive Sim): closest matches first, and among equally close ones the better-known games.

The Room
Shared: Puzzle · Point & Click · Adventure

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

The Room Three
Shared: Adventure · Puzzle · Point & Click

Platform 8
Shared: Adventure · Simulation · Puzzle

The Room 4: Old Sins
Shared: Puzzle · Point & Click · Adventure

SchoolBoy Runaway
Shared: Adventure · Simulation · Puzzle

Fran Bow
Shared: Point & Click · Puzzle · Adventure

MiSide
Shared: First-Person · Horror · 3D

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

Poppy Playtime
Shared: Puzzle · First-Person · Horror

The Exit 8
Shared: Puzzle · Immersive Sim · Horror

Papers, Please
Shared: Simulation · Point & Click · Puzzle

The House of Da Vinci
Shared: Puzzle · Point & Click · Hidden Object

MOLE
Shared: Simulation · Adventure · Puzzle

The Cabin Factory
Shared: Immersive Sim · Adventure · Simulation

PC Building Simulator
Shared: Simulation · Immersive Sim · First-Person

Sally Face - Episode One
Shared: Adventure · Puzzle · Point & Click

Samsara Room
Shared: Adventure · Puzzle · Point & Click

Boxes: Lost Fragments
Shared: Puzzle · Point & Click · Adventure

Servant of the Lake
Shared: Adventure · Puzzle · Point & Click

Chants of Sennaar
Shared: Adventure · Puzzle · Point & Click

Little Nightmares II
Shared: Adventure · Puzzle · Horror

Car Mechanic Simulator 2021
Shared: Simulation · Realistic · 3D

Inside the Backrooms
Shared: Puzzle · Adventure · Horror