Games like Jim's Nightmare: Chapter 1
Games like Jim's Nightmare: Chapter 1 include Disco Elysium - The Final Cut, OneShot, The Witcher 3: Wild Hunt — Remastered, Undertale, and Back to the Dawn. We matched them by the tags players give Jim's Nightmare: Chapter 1 on Steam (RPG, Story Rich, Choices Matter, Pixel Graphics, and Psychological): closest matches first, and among equally close ones the better-known games.

Disco Elysium - The Final Cut
Shared: RPG · Story Rich · Choices Matter

OneShot
Shared: Story Rich · Pixel Graphics · Atmospheric

The Witcher 3: Wild Hunt — Remastered
Shared: RPG · Story Rich · Atmospheric

Undertale
Shared: Story Rich · Choices Matter · RPG

Back to the Dawn
Shared: RPG · Story Rich · Pixel Graphics

Esoteric Ebb
Shared: Story Rich · RPG · Choices Matter

The Wolf Among Us
Shared: Story Rich · Choices Matter · Detective

Finding Paradise
Shared: Story Rich · Pixel Graphics · RPG

The Test
Shared: Story Rich · Pixel Graphics · Psychological

Unavowed
Shared: Story Rich · Pixel Graphics · Point & Click

Baldur's Gate 3
Shared: RPG · Choices Matter · Story Rich

The Red Strings Club
Shared: Story Rich · Pixel Graphics · Choices Matter

DELTARUNE
Shared: Story Rich · RPG · Pixel Graphics

Tales of the Black Forest
Shared: RPG · Pixel Graphics · Story Rich

Strange Horticulture
Shared: Puzzle · Atmospheric · Detective

The Thaumaturge
Shared: RPG · Story Rich · Choices Matter

Heartbound
Shared: RPG · Story Rich · Pixel Graphics

Pathologic 2
Shared: Story Rich · Choices Matter · RPG

Papers, Please
Shared: Pixel Graphics · Point & Click · Story Rich

To the Moon
Shared: Story Rich · Pixel Graphics · RPG

The Rewinder
Shared: Pixel Graphics · Story Rich · Puzzle

Fran Bow
Shared: Story Rich · Point & Click · Puzzle

Return of the Obra Dinn
Shared: Story Rich · Detective · Atmospheric

The Coffin of Andy and Leyley
Shared: Story Rich · Psychological · Choices Matter