Games like Don't Wake Grandpa
Games like Don't Wake Grandpa include Buckshot Roulette, Bendy and the Ink Machine, Bloons TD 6, Garten of Banban, and Among Us 3D. We matched them by the tags players give Don't Wake Grandpa on Steam (Casual, Strategy, 3D, Cartoony, and First-Person): closest matches first, and among equally close ones the better-known games.

Buckshot Roulette
Shared: Strategy · Dark · First-Person

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

Bloons TD 6
Shared: Strategy · Casual · 3D

Garten of Banban
Shared: First-Person · Horror · Cartoony

Among Us 3D
Shared: Strategy · Casual · 3D

Ultimate Custom Night
Shared: Strategy · Horror · First-Person

Bendy and the Dark Revival
Shared: First-Person · Horror · Cartoony

Poppy Playtime
Shared: First-Person · Horror · Dark

Liars Bar
Shared: Casual · 3D · First-Person

Garten of Banban 2
Shared: First-Person · Cartoony · Horror

The WereCleaner
Shared: Casual · Cartoony · Strategy

Five Nights at Freddy's: Sister Location
Shared: First-Person · Horror · Strategy

Five Nights at Freddy's 4
Shared: First-Person · Horror · Dark

Garten of Banban 3
Shared: First-Person · Cartoony · 3D

Five Nights at Freddy's: Security Breach
Shared: First-Person · Horror · 3D

Five Nights at Freddy's 2
Shared: Horror · First-Person · Survival Horror

Garten of Banban 4
Shared: Cartoony · First-Person · Horror

CloverPit
Shared: Strategy · First-Person · 3D

Plants vs. Zombies GOTY Edition
Shared: Strategy · Casual · Comedy

Dale & Dawson Stationery Supplies
Shared: Casual · 3D · First-Person

Choo-Choo Charles
Shared: First-Person · 3D · Horror

Outlast
Shared: First-Person · Horror · Survival Horror

Garten of Banban 8: Anti Devil
Shared: First-Person · Cartoony · Horror

R.E.P.O.
Shared: Comedy · Horror · 3D