Games like KRAMPEN
Games like KRAMPEN include No, I'm not a Human, Tiny Bunny, INSIDE, The Wolf Among Us, and Sally Face - Episode One. We matched them by the tags players give KRAMPEN on Steam (Horror, Singleplayer, Multiple Endings, Story Rich, and Dark): closest matches first, and among equally close ones the better-known games.

No, I'm not a Human
Shared: Horror · Singleplayer · Story Rich

Tiny Bunny
Shared: Horror · Story Rich · Dark

INSIDE
Shared: Horror · Dark · Story Rich

The Wolf Among Us
Shared: Story Rich · Multiple Endings · Detective

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

Firewatch
Shared: Story Rich · Singleplayer · Walking Simulator

Little Nightmares II
Shared: Horror · Singleplayer · Dark

Five Nights at Freddy's: Security Breach
Shared: Horror · Singleplayer · Multiple Endings

Little Nightmares
Shared: Horror · Singleplayer · Dark

Mouthwashing
Shared: Horror · Story Rich · Indie

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

Fran Bow
Shared: Horror · Story Rich · Singleplayer

Undertale
Shared: Story Rich · Multiple Endings · Singleplayer

SOMA
Shared: Horror · Story Rich · Dark

Five Nights at Freddy's: Into the Pit
Shared: Horror · Singleplayer · Multiple Endings

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

Hellblade: Senua's Sacrifice
Shared: Story Rich · Singleplayer · Horror

Disco Elysium - The Final Cut
Shared: Story Rich · Singleplayer · Detective

DISTRAINT: Deluxe Edition
Shared: Horror · Indie · Story Rich

Little Misfortune
Shared: Story Rich · Horror · Indie

Papers, Please
Shared: Singleplayer · Indie · Multiple Endings

Poppy Playtime
Shared: Horror · Singleplayer · Dark

The Coffin of Andy and Leyley
Shared: Multiple Endings · Story Rich · Singleplayer

The Casting of Frank Stone™
Shared: Horror · Multiple Endings · Singleplayer