Games like Project Tape
Games like Project Tape include Poppy Playtime, Dark Deception, MiSide, Little Nightmares II, and Little Nightmares. We matched them by the tags players give Project Tape on Steam (Adventure, Horror, Psychological Horror, Singleplayer, and Indie): closest matches first, and among equally close ones the better-known games.

Poppy Playtime
Shared: Horror · Singleplayer · Free to Play

Dark Deception
Shared: Horror · Singleplayer · Free to Play

MiSide
Shared: Psychological Horror · Horror · Singleplayer

Little Nightmares II
Shared: Adventure · Horror · Singleplayer

Little Nightmares
Shared: Horror · Adventure · Singleplayer

Samsara Room
Shared: Adventure · Indie · Free to Play

Ultimate Custom Night
Shared: Horror · Singleplayer · Free to Play

Getting Over It with Bennett Foddy
Shared: Psychological Horror · Singleplayer · Horror

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

ParanormalHK
Shared: Horror · Psychological Horror · Sexual Content

Outlast
Shared: Horror · Psychological Horror · Singleplayer

Escape the Backrooms
Shared: Horror · Psychological Horror · Adventure

Changed
Shared: Psychological Horror · Sexual Content · Adventure

Fran Bow
Shared: Psychological Horror · Horror · Adventure

Layers of Fear (2016)
Shared: Horror · Psychological Horror · Singleplayer

DISTRAINT: Deluxe Edition
Shared: Horror · Psychological Horror · Indie

Outlast 2
Shared: Horror · Psychological Horror · Singleplayer

Little Misfortune
Shared: Psychological Horror · Indie · Adventure

Five Nights at Freddy's
Shared: Horror · Singleplayer · Psychological Horror

Blair Witch
Shared: Adventure · Horror · Psychological Horror

The Beast Inside
Shared: Adventure · Horror · Singleplayer

The Medium
Shared: Adventure · Horror · Psychological Horror

Bad Dream: Fever
Shared: Adventure · Horror · Indie

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