Games like Mummy Sandbox
Games like Mummy Sandbox include Poppy Playtime, The Room, The Room Two, Bendy and the Ink Machine, and The Room Three. We matched them by the tags players give Mummy Sandbox on Steam (Adventure, Horror, Puzzle, Experimental, and First-Person): closest matches first, and among equally close ones the better-known games.

Poppy Playtime
Shared: Horror · Puzzle · First-Person

The Room
Shared: Puzzle · Adventure · Point & Click

The Room Two
Shared: Puzzle · Horror · Adventure

Bendy and the Ink Machine
Shared: Horror · Puzzle · First-Person

The Room Three
Shared: Adventure · Puzzle · Indie

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

Bendy and the Dark Revival
Shared: Horror · Adventure · First-Person

Little Nightmares II
Shared: Adventure · Horror · Puzzle

Fran Bow
Shared: Puzzle · Horror · Adventure

Little Nightmares
Shared: Horror · Adventure · Puzzle

Rusty Lake Paradise
Shared: Puzzle · Adventure · Horror

Chants of Sennaar
Shared: Adventure · Puzzle · Indie

Samsara Room
Shared: Adventure · Puzzle · Indie

Sally Face - Episode One
Shared: Horror · Adventure · Puzzle

Granny
Shared: Horror · Puzzle · First-Person

Underground Blossom
Shared: Adventure · Puzzle · Horror

Decay: The Mare
Shared: Adventure · Horror · Puzzle

Hello Neighbor 2
Shared: Adventure · Horror · Puzzle

Buckshot Roulette
Shared: Horror · First-Person · Indie

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

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

Amnesia: Rebirth
Shared: Puzzle · First-Person · Horror

Paper Dolls: Original /
Shared: Adventure · Horror · Puzzle

Five Nights at Freddy's: Security Breach
Shared: Horror · First-Person · Singleplayer