Games like Escape Protocol: Hospital
Games like Escape Protocol: Hospital include Little Nightmares II, Poppy Playtime, Little Nightmares, The Room, and INSIDE. We matched them by the tags players give Escape Protocol: Hospital on Steam (Adventure, Text-Based, Puzzle, Horror, and Singleplayer): closest matches first, and among equally close ones the better-known games.

Little Nightmares II
Shared: Adventure · Horror · Puzzle

Poppy Playtime
Shared: Horror · Puzzle · Singleplayer

Little Nightmares
Shared: Adventure · Horror · Singleplayer

The Room
Shared: Puzzle · Adventure · Singleplayer

INSIDE
Shared: Horror · Adventure · Singleplayer

That's not my Neighbor
Shared: Adventure · Horror · Casual

Five Nights at Freddy's: Into the Pit
Shared: Adventure · Horror · Singleplayer

Scribblenauts Unlimited
Shared: Adventure · Puzzle · Casual

LIMBO
Shared: Puzzle · Adventure · Singleplayer

Stray
Shared: Adventure · Singleplayer · Puzzle

Five Nights at Freddy's: Security Breach
Shared: Horror · Singleplayer · Multiple Endings

Firework
Shared: Horror · Puzzle · Singleplayer

Atomic Heart
Shared: Adventure · Singleplayer · Horror

Strange Jigsaws
Shared: Adventure · Puzzle · Casual

There Is No Game: Wrong Dimension
Shared: Puzzle · Adventure · Singleplayer

Rusty Lake Paradise
Shared: Puzzle · Adventure · Horror

The Room 4: Old Sins
Shared: Puzzle · Adventure · Singleplayer

The Room Three
Shared: Adventure · Puzzle · Singleplayer

PARANORMASIGHT: The Seven Mysteries of Honjo
Shared: Adventure · Horror · Text-Based

Please, Don't Touch Anything 3D
Shared: Adventure · Puzzle · Casual

Stories Untold
Shared: Adventure · Text-Based · Horror

Iris.Fall
Shared: Adventure · Puzzle · Horror

Storyteller
Shared: Puzzle · Adventure · Singleplayer

DISTRAINT: Deluxe Edition
Shared: Horror · Adventure · Singleplayer