Games like Nocturnal Visitors
Games like Nocturnal Visitors include Melvor Idle, DISTRAINT: Deluxe Edition, Sally Face - Episode One, Kingdom Rush Frontiers - Tower Defense, and Poppy Playtime. We matched them by the tags players give Nocturnal Visitors on Steam (Casual, 2D, Adventure, Horror, and Colorful): closest matches first, and among equally close ones the better-known games.

Melvor Idle
Shared: Casual · Adventure · 2D

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

Sally Face - Episode One
Shared: Horror · Adventure · Indie

Kingdom Rush Frontiers - Tower Defense
Shared: 2D · Casual · Fantasy

Poppy Playtime
Shared: Horror · Singleplayer · Dark

Sanfu
Shared: 2D · Adventure · Mystery

Happy Game
Shared: Horror · Casual · 2D

LIMBO
Shared: 2D · Adventure · Indie

Strange Jigsaws
Shared: Casual · Adventure · 2D

Slime Rancher
Shared: Adventure · Colorful · Casual

The Room
Shared: Adventure · Mystery · Horror

Hogwarts Legacy
Shared: Adventure · Magic · Fantasy

Firework
Shared: Horror · 2D · Indie

A Dance of Fire and Ice
Shared: 2D · Colorful · Casual

That's not my Neighbor
Shared: Casual · Adventure · Horror

Firewatch
Shared: Adventure · Mystery · Singleplayer

Little Nightmares
Shared: Horror · Adventure · Dark

Kingdom Rush - Tower Defense
Shared: 2D · Casual · Fantasy

Five Nights at Freddy's: Into the Pit
Shared: Horror · Adventure · 2D

Little Nightmares II
Shared: Adventure · Horror · Dark

Cookie Clicker
Shared: Casual · Horror · 2D

The Room Two
Shared: Horror · Adventure · Mystery

Rusty Lake Paradise
Shared: Adventure · Horror · 2D

Storyteller
Shared: 2D · Adventure · Fantasy