Games like Waterfall Prisoner
Games like Waterfall Prisoner include The Room 4: Old Sins, The Room, Blue Prince, The Room Three, and Quern - Undying Thoughts. We matched them by the tags players give Waterfall Prisoner on Steam (Adventure, Puzzle, Escape Room, Point & Click, and Walking Simulator): closest matches first, and among equally close ones the better-known games.

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

The Room
Shared: Puzzle · Point & Click · Adventure

Blue Prince
Shared: Puzzle · Exploration · Mystery

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

Quern - Undying Thoughts
Shared: Adventure · Puzzle · Walking Simulator

Firewatch
Shared: Adventure · Walking Simulator · Mystery

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

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

What Remains of Edith Finch
Shared: Walking Simulator · Adventure · Exploration

Servant of the Lake
Shared: Adventure · Puzzle · Escape Room

Riven
Shared: Adventure · Puzzle · Exploration

Outer Wilds
Shared: Adventure · Exploration · Puzzle

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

The Witness
Shared: Puzzle · Exploration · Adventure

Underground Blossom
Shared: Adventure · Escape Room · Puzzle

Samsara Room
Shared: Puzzle · Adventure · Point & Click

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

Obduction
Shared: Adventure · Puzzle · Exploration

Murders on the Yangtze River
Shared: Puzzle · Adventure · Exploration

The Room VR: A Dark Matter
Shared: Adventure · Puzzle · Investigation

Agent A: A puzzle in disguise
Shared: Escape Room · Puzzle · Point & Click

Escape Simulator
Shared: Puzzle · Escape Room · Adventure

The Painscreek Killings
Shared: Puzzle · Investigation · Exploration

INFRA
Shared: Puzzle · Adventure · Exploration