Games like Overlast
Games like Overlast include Poppy Playtime, Five Nights at Freddy's: Security Breach, Inside the Backrooms, Outer Wilds, and Bendy and the Ink Machine. We matched them by the tags players give Overlast on Steam (Puzzle, Horror, Adventure, Singleplayer, and First-Person): closest matches first, and among equally close ones the better-known games.

Poppy Playtime
Shared: Horror · Puzzle · Singleplayer

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

Inside the Backrooms
Shared: Horror · Puzzle · Adventure

Outer Wilds
Shared: Exploration · Adventure · Puzzle

Bendy and the Ink Machine
Shared: Horror · Puzzle · Singleplayer

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

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

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

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

Garten of Banban
Shared: Horror · Singleplayer · Puzzle

Outlast
Shared: Horror · First-Person · Singleplayer

SOMA
Shared: Horror · Psychological Horror · Exploration

Little Nightmares II
Shared: Horror · Adventure · Puzzle

Lethal Company
Shared: Horror · First-Person · Exploration

Layers of Fear (2016)
Shared: Horror · Psychological Horror · First-Person

Little Nightmares
Shared: Horror · Adventure · Singleplayer

Firewatch
Shared: Adventure · First-Person · Singleplayer

What Remains of Edith Finch
Shared: First-Person · Adventure · Exploration

The Room Two
Shared: Puzzle · Horror · Adventure

The Room
Shared: Puzzle · Singleplayer · Adventure

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

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

The Room Three
Shared: Puzzle · Adventure · Singleplayer

Granny
Shared: Horror · Puzzle · Singleplayer