Games like Indigo Park: Chapter 1
Games like Indigo Park: Chapter 1 include Poppy Playtime, Dark Deception, Outlast, Ultimate Custom Night, and Escape the Backrooms. We matched them by the tags players give Indigo Park: Chapter 1 on Steam (Horror, Free to Play, First-Person, Indie, and Singleplayer): closest matches first, and among equally close ones the better-known games.

Poppy Playtime
Shared: Horror · Free to Play · Singleplayer

Dark Deception
Shared: Horror · Free to Play · First-Person

Outlast
Shared: Horror · First-Person · Singleplayer

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

Escape the Backrooms
Shared: Horror · First-Person · Adventure

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

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

MiSide
Shared: Horror · Cute · First-Person

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

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

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

Spooky's Jump Scare Mansion: HD Renovation
Shared: Horror · Indie · First-Person

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

Buckshot Roulette
Shared: Horror · First-Person · Singleplayer

Resident Evil Requiem
Shared: Horror · First-Person · Singleplayer

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

Five Nights at Freddy's: Secret of the Mimic
Shared: Horror · First-Person · Adventure

Outlast 2
Shared: Horror · First-Person · Singleplayer

Granny
Shared: Horror · First-Person · Singleplayer

Little Nightmares II
Shared: Horror · Singleplayer · Adventure

The Forest
Shared: Horror · First-Person · Adventure

Halo Infinite
Shared: Free to Play · Singleplayer · First-Person

Where Winds Meet
Shared: Free to Play · Singleplayer · Adventure

Slime Rancher
Shared: Cute · Singleplayer · First-Person