Games like おかあさん
Games like おかあさん include Firewatch, What Remains of Edith Finch, Layers of Fear (2016), The Beginner's Guide, and Bendy and the Dark Revival. We matched them by the tags players give おかあさん on Steam (Horror, Story Rich, Adventure, Walking Simulator, and Choose Your Own Adventure): closest matches first, and among equally close ones the better-known games.

Firewatch
Shared: Adventure · Story Rich · Walking Simulator

What Remains of Edith Finch
Shared: Story Rich · Walking Simulator · Adventure

Layers of Fear (2016)
Shared: Horror · Walking Simulator · Story Rich

The Beginner's Guide
Shared: Story Rich · Walking Simulator · First-Person

Bendy and the Dark Revival
Shared: Horror · Singleplayer · Adventure

Amnesia: A Machine For Pigs
Shared: Horror · Story Rich · Walking Simulator

The Beast Inside
Shared: Horror · Adventure · First-Person

MiSide
Shared: Story Rich · Horror · Singleplayer

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

Blair Witch
Shared: Horror · Adventure · First-Person

Still Wakes the Deep
Shared: Horror · Story Rich · Walking Simulator

Little Nightmares
Shared: Horror · Adventure · Singleplayer

Little Nightmares II
Shared: Horror · Adventure · Singleplayer

The Walking Dead
Shared: Story Rich · Adventure · Horror

Mouthwashing
Shared: Horror · Story Rich · Walking Simulator

SOMA
Shared: Horror · Story Rich · First-Person

Poppy Playtime
Shared: Horror · Singleplayer · First-Person

Before Your Eyes
Shared: Story Rich · First-Person · Walking Simulator

Among the Sleep - Enhanced Edition
Shared: Horror · Adventure · Walking Simulator

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

Kona
Shared: Adventure · Story Rich · Singleplayer

Sally Face - Episode One
Shared: Story Rich · Horror · Adventure

The Death | Thần Trùng
Shared: Horror · Adventure · Indie

Outlast
Shared: Horror · First-Person · Singleplayer