Games like Pristiq: Tash's Trilogy
Games like Pristiq: Tash's Trilogy include Undertale, DELTARUNE, DISTRAINT: Deluxe Edition, The Witcher 3: Wild Hunt — Remastered, and Little Nightmares II. We matched them by the tags players give Pristiq: Tash's Trilogy on Steam (Dark, Singleplayer, Horror, Faith, and Pixel Graphics): closest matches first, and among equally close ones the better-known games.

Undertale
Shared: Pixel Graphics · Singleplayer · Choices Matter

DELTARUNE
Shared: Pixel Graphics · Singleplayer · Story Rich

DISTRAINT: Deluxe Edition
Shared: Horror · Pixel Graphics · 2D

The Witcher 3: Wild Hunt — Remastered
Shared: Open World · Singleplayer · Adventure

Little Nightmares II
Shared: Horror · Singleplayer · Dark

Tiny Bunny
Shared: Horror · Dark · Singleplayer

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

OMORI
Shared: Pixel Graphics · Psychological Horror · Horror

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

LISA: The Painful
Shared: Dark · Psychological Horror · Pixel Graphics

Little Nightmares
Shared: Horror · Singleplayer · Dark

The Hex
Shared: Singleplayer · Dark · Pixel Graphics

The Witch's House MV
Shared: Horror · Pixel Graphics · 2D

Poppy Playtime
Shared: Singleplayer · Horror · Dark

OneShot
Shared: Pixel Graphics · Singleplayer · Story Rich

Darkwood
Shared: Horror · Dark · Adventure

Little Misfortune
Shared: Horror · Psychological Horror · Singleplayer

Five Nights at Freddy's: Into the Pit
Shared: Horror · Singleplayer · Pixel Graphics

To the Moon
Shared: Singleplayer · Pixel Graphics · Story Rich

Tales of the Black Forest
Shared: Horror · Pixel Graphics · Adventure

Finding Paradise
Shared: Pixel Graphics · Singleplayer · 2D

Pony Island
Shared: Singleplayer · Pixel Graphics · Dark

Impostor Factory
Shared: Pixel Graphics · Singleplayer · 2D

Fran Bow
Shared: Horror · Dark · Psychological Horror