Games like HR Hell
Games like HR Hell include Undertale, Do Not Feed the Monkeys, Papers, Please, Death and Taxes, and Beholder. We matched them by the tags players give HR Hell on Steam (Choices Matter, Simulation, Dark Comedy, Multiple Endings, and Management): closest matches first, and among equally close ones the better-known games.

Undertale
Shared: Choices Matter · Multiple Endings · Story Rich

Do Not Feed the Monkeys
Shared: Choices Matter · Management · Dark Humor

Papers, Please
Shared: Simulation · Multiple Endings · Pixel Graphics

Death and Taxes
Shared: Choices Matter · Simulation · Story Rich

Beholder
Shared: Choices Matter · Simulation · Story Rich

The Test
Shared: Simulation · Multiple Endings · Story Rich

Emily is Away Too
Shared: Simulation · Choices Matter · Multiple Endings

Yes, Your Grace
Shared: Choices Matter · Story Rich · Pixel Graphics

No Umbrellas Allowed
Shared: Simulation · Choices Matter · Management

The Coffin of Andy and Leyley
Shared: Dark Comedy · Multiple Endings · Choices Matter

Not For Broadcast
Shared: Choices Matter · Simulation · Dark Comedy

OneShot
Shared: Story Rich · Pixel Graphics · Choices Matter

Kindergarten
Shared: Choices Matter · Funny · Dark Humor

Graveyard Keeper
Shared: Simulation · Pixel Graphics · Management

Game Dev Tycoon
Shared: Simulation · Management · Indie

Detroit: Become Human
Shared: Choices Matter · Multiple Endings · Story Rich

DAVE THE DIVER
Shared: Management · Pixel Graphics · Simulation

This War of Mine
Shared: Choices Matter · Simulation · Management

Beholder 2
Shared: Choices Matter · Simulation · Story Rich

This Is the Police
Shared: Choices Matter · Management · Story Rich

Teamfight Manager
Shared: Simulation · Management · Choices Matter

Beholder Conductor
Shared: Choices Matter · Simulation · Story Rich

911 Operator
Shared: Simulation · Management · Choices Matter

Lobotomy Corporation | Monster Management Simulation
Shared: Management · Simulation · Story Rich