Games like Hell's High Harmonizers
Games like Hell's High Harmonizers include Papers, Please, Stardew Valley, Potion Craft: Alchemist Simulator, Graveyard Keeper, and Unpacking. We matched them by the tags players give Hell's High Harmonizers on Steam (Simulation, Singleplayer, 2D, Pixel Graphics, and Indie): closest matches first, and among equally close ones the better-known games.

Papers, Please
Shared: Simulation · Indie · Singleplayer

Stardew Valley
Shared: Pixel Graphics · Simulation · Relaxing

Potion Craft: Alchemist Simulator
Shared: Singleplayer · Simulation · Relaxing

Graveyard Keeper
Shared: Simulation · Pixel Graphics · Singleplayer

Unpacking
Shared: Relaxing · Pixel Graphics · Singleplayer

The Escapists
Shared: Pixel Graphics · Singleplayer · Simulation

DAVE THE DIVER
Shared: Pixel Graphics · Singleplayer · Relaxing

Coffee Talk
Shared: Pixel Graphics · Relaxing · Atmospheric

OneShot
Shared: Pixel Graphics · Indie · Singleplayer

Paralives
Shared: Simulation · Indie · Singleplayer

Crime Scene Cleaner
Shared: Simulation · Singleplayer · Relaxing

Russian Life Simulator
Shared: Simulation · Singleplayer · 2D

People Playground
Shared: 2D · Singleplayer · Simulation

The Binding of Isaac: Rebirth
Shared: Indie · Pixel Graphics · Singleplayer

Vampire Survivors
Shared: Pixel Graphics · 2D · Singleplayer

The Escapists 2
Shared: Pixel Graphics · 2D · Simulation

Coffee Talk Episode 2: Hibiscus & Butterfly
Shared: Pixel Graphics · Relaxing · Simulation

Plague Inc: Evolved
Shared: Simulation · Singleplayer · Indie

GRIS
Shared: Indie · Atmospheric · Singleplayer

Game Dev Tycoon
Shared: Simulation · Indie · Singleplayer

Rain World
Shared: Atmospheric · Indie · Pixel Graphics

Celeste
Shared: Pixel Graphics · Indie · Singleplayer

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

Skul: The Hero Slayer
Shared: Indie · Pixel Graphics · 2D