Games like ESCAPE SITE 13
Games like ESCAPE SITE 13 include Firework, OMORI, Tales of the Black Forest, Sally Face - Episode One, and DISTRAINT: Deluxe Edition. We matched them by the tags players give ESCAPE SITE 13 on Steam (CRPG, Side Scroller, RPG, 2D Platformer, and Interactive Fiction): closest matches first, and among equally close ones the better-known games.

Firework
Shared: Puzzle · 2D · Horror

OMORI
Shared: RPG · Psychological Horror · Story Rich

Tales of the Black Forest
Shared: RPG · Horror · Indie

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

DISTRAINT: Deluxe Edition
Shared: 2D · Horror · Psychological Horror

Knock-knock
Shared: Side Scroller · 2D Platformer · Puzzle

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

Baldur's Gate 3
Shared: RPG · CRPG · Story Rich

Angels of Death
Shared: RPG · Puzzle · 2D

LIMBO
Shared: Puzzle · 2D · Side Scroller

ASTLIBRA Revision
Shared: Side Scroller · RPG · 2D

Esoteric Ebb
Shared: CRPG · RPG · Interactive Fiction

Sanfu
Shared: RPG · Puzzle · 2D

Finding Paradise
Shared: RPG · 2D · Interactive Fiction

MiSide
Shared: Psychological Horror · Horror · Story Rich

LISA: The Painful
Shared: RPG · Psychological Horror · JRPG

Impostor Factory
Shared: RPG · 2D · Story Rich

Pocket Mirror ~ GoldenerTraum
Shared: RPG · Horror · Puzzle

Paper Bride 3 Unresolved Love
Shared: 2D Platformer · Interactive Fiction · RPG

Unheard - Voices of Crime
Shared: Puzzle · RPG · Thriller

Ib
Shared: RPG · Horror · 2D

Heartbound
Shared: RPG · 2D · Adventure

OFF
Shared: RPG · 2D · JRPG

To the Moon
Shared: Interactive Fiction · RPG · Story Rich