Games like The Niflhel Day
Games like The Niflhel Day include Disco Elysium - The Final Cut, Esoteric Ebb, Sanfu, Suzerain, and Tiny Bunny. We matched them by the tags players give The Niflhel Day on Steam (Adventure, RPG, Point & Click, Visual Novel, and Interactive Fiction): closest matches first, and among equally close ones the better-known games.

Disco Elysium - The Final Cut
Shared: RPG · Point & Click · CRPG

Esoteric Ebb
Shared: RPG · Interactive Fiction · CRPG

Sanfu
Shared: RPG · Adventure · Visual Novel

Suzerain
Shared: Visual Novel · Interactive Fiction · RPG

Tiny Bunny
Shared: Visual Novel · Adventure · Interactive Fiction

OMORI
Shared: RPG · Adventure · Indie

Hogwarts Legacy
Shared: Adventure · RPG · Exploration

The Hungry Lamb: Traveling in the Late Ming Dynasty
Shared: Visual Novel · Interactive Fiction · Adventure

HIVESWAP: Act 2
Shared: Adventure · Point & Click · Visual Novel

Fallout 4
Shared: RPG · Adventure · Exploration

No Case Should Remain Unsolved
Shared: Visual Novel · Point & Click · Interactive Fiction

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

Sally Face - Episode One
Shared: Adventure · Point & Click · Indie

Slay the Princess — The Pristine Cut
Shared: Visual Novel · Point & Click · Interactive Fiction

Gothic 1 Remake
Shared: Adventure · RPG · Exploration

Tales of the Black Forest
Shared: RPG · Adventure · Visual Novel

Storyteller
Shared: Point & Click · Adventure · Interactive Fiction

The Dream Machine: Chapter 1 & 2
Shared: Adventure · Point & Click · 2D

The Crown of Leaves
Shared: Adventure · Visual Novel · Point & Click

Rusty Lake Paradise
Shared: Point & Click · Adventure · Indie

Who's Lila?
Shared: Point & Click · Interactive Fiction · Visual Novel

The Mermaid Mask
Shared: Adventure · Point & Click · Interactive Fiction

The Life and Suffering of Sir Brante
Shared: RPG · Interactive Fiction · Visual Novel

HIVESWAP: ACT 1
Shared: Adventure · Point & Click · RPG