Games like Grandpa
Games like Grandpa include Dead by Daylight, Outlast 2, Resident Evil 7 Biohazard, Outlast, and Resident Evil Village. We matched them by the tags players give Grandpa on Steam (Indie, Horror, Survival Horror, Gore, and Violent): closest matches first, and among equally close ones the better-known games.

Dead by Daylight
Shared: Horror · Survival Horror · Gore

Outlast 2
Shared: Horror · Survival Horror · Gore

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

Outlast
Shared: Horror · Survival Horror · First-Person

Resident Evil Village
Shared: Horror · Survival Horror · First-Person

Granny
Shared: Horror · Survival Horror · Indie

Dying Light
Shared: Horror · Survival Horror · First-Person

Lethal Company
Shared: Horror · Survival Horror · First-Person

Amnesia: The Dark Descent
Shared: Horror · Gore · Survival Horror

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

DEVOUR
Shared: Horror · Survival Horror · First-Person

Poppy Playtime
Shared: Horror · Survival Horror · First-Person

The Outlast Trials
Shared: Horror · Survival Horror · First-Person

Five Nights at Freddy's
Shared: Horror · Survival Horror · Indie

Granny: Chapter Two
Shared: Horror · Indie · Gore

Resident Evil 2
Shared: Horror · Survival Horror · Gore

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

Nightmare of Decay
Shared: Horror · Survival Horror · Indie

The Texas Chain Saw Massacre
Shared: Horror · Survival Horror · Gore

[Chillas Art] Aka Manto
Shared: Indie · Horror · Gore

Home Sweet Home
Shared: Horror · Indie · Survival Horror

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

Slender: The Arrival
Shared: Horror · Survival Horror · Indie

The Forest
Shared: Horror · Survival Horror · First-Person