Games like Terminal Shift
Games like Terminal Shift include Poppy Playtime, SOMA, The Exit 8, Layers of Fear (2016), and Inside the Backrooms. We matched them by the tags players give Terminal Shift on Steam (Horror, Exploration, Dark, Hidden Object, and Puzzle): closest matches first, and among equally close ones the better-known games.

Poppy Playtime
Shared: Horror · Puzzle · Dark

SOMA
Shared: Horror · Psychological Horror · Dark

The Exit 8
Shared: Exploration · Horror · Puzzle

Layers of Fear (2016)
Shared: Horror · Psychological Horror · Atmospheric

Inside the Backrooms
Shared: Horror · Puzzle · Psychological Horror

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

The Room Two
Shared: Puzzle · Horror · Hidden Object

Amnesia: The Dark Descent
Shared: Horror · Psychological Horror · Puzzle

Little Nightmares II
Shared: Horror · Dark · Puzzle

Outlast
Shared: Horror · Psychological Horror · First-Person

Platform 8
Shared: Psychological Horror · Exploration · Puzzle

Garten of Banban
Shared: Horror · Psychological Horror · Puzzle

Amnesia: A Machine For Pigs
Shared: Horror · Exploration · Psychological Horror

Little Nightmares
Shared: Horror · Dark · Atmospheric

Lethal Company
Shared: Horror · Exploration · First-Person

ROUTINE
Shared: Dark · Psychological Horror · Horror

Sally Face - Episode One
Shared: Horror · Dark · Psychological Horror

Visage
Shared: Horror · Dark · Psychological Horror

Still Wakes the Deep
Shared: Horror · Psychological Horror · Dark

Mouthwashing
Shared: Horror · Psychological Horror · Atmospheric

Firewatch
Shared: Exploration · Atmospheric · Walking Simulator

Backrooms: Escape Together
Shared: Horror · Psychological Horror · Exploration

The Room
Shared: Puzzle · Hidden Object · Atmospheric

Outer Wilds
Shared: Exploration · Puzzle · Atmospheric