Games like Speechless
Games like Speechless include Amnesia: Rebirth, Five Nights at Freddy's: Security Breach, Poppy Playtime, Amnesia: The Dark Descent, and Inside the Backrooms. We matched them by the tags players give Speechless on Steam (Exploration, Puzzle, Action-Adventure, 3D, and First-Person): closest matches first, and among equally close ones the better-known games.

Amnesia: Rebirth
Shared: Action-Adventure · Puzzle · First-Person

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

Poppy Playtime
Shared: Puzzle · Horror · First-Person

Amnesia: The Dark Descent
Shared: Horror · Puzzle · First-Person

Inside the Backrooms
Shared: Puzzle · Horror · Exploration

SOMA
Shared: Horror · Exploration · Atmospheric

Outlast
Shared: First-Person · Horror · Atmospheric

Five Nights at Freddy's: Secret of the Mimic
Shared: First-Person · Horror · Exploration

Little Nightmares II
Shared: Puzzle · Horror · Adventure

Escape the Backrooms
Shared: Horror · Exploration · First-Person

Resident Evil 7 Biohazard
Shared: Horror · First-Person · Survival Horror

Little Nightmares
Shared: Horror · Puzzle · Atmospheric

Lethal Company
Shared: First-Person · Horror · Exploration

Hello Neighbor 2
Shared: Puzzle · Action-Adventure · First-Person

Outer Wilds
Shared: Exploration · Puzzle · Adventure

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

Garten of Banban
Shared: Horror · First-Person · Puzzle

Choo-Choo Charles
Shared: Horror · First-Person · 3D

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

Indiana Jones and the Great Circle
Shared: Action-Adventure · Puzzle · First-Person

Stray
Shared: Exploration · Atmospheric · Puzzle

The Exit 8
Shared: Exploration · Puzzle · Horror

The Forest
Shared: Horror · Exploration · First-Person

Buckshot Roulette
Shared: First-Person · Horror · Dark