Games like Touhou Luna Nights
Games like Touhou Luna Nights include Hollow Knight: Silksong, Hollow Knight, Rabi-Ribi, Bloodstained: Ritual of the Night, and Momodora: Reverie Under The Moonlight. We matched them by the tags players give Touhou Luna Nights on Steam (Metroidvania, Difficult, Side Scroller, Bullet Hell, and Exploration): closest matches first, and among equally close ones the better-known games.

Hollow Knight: Silksong
Shared: Metroidvania · Difficult · Platformer

Hollow Knight
Shared: Metroidvania · Difficult · Platformer

Rabi-Ribi
Shared: Metroidvania · Bullet Hell · Exploration

Bloodstained: Ritual of the Night
Shared: Metroidvania · Female Protagonist · Side Scroller

Momodora: Reverie Under The Moonlight
Shared: Metroidvania · Side Scroller · Exploration

Afterimage
Shared: Metroidvania · Side Scroller · Female Protagonist

TEVI
Shared: Metroidvania · Bullet Hell · Side Scroller

Record of Lodoss War-Deedlit in Wonder Labyrinth-
Shared: Metroidvania · Exploration · Female Protagonist

Ori and the Will of the Wisps
Shared: Metroidvania · Platformer · Exploration

Skul: The Hero Slayer
Shared: Metroidvania · Difficult · Platformer

Rain World
Shared: Difficult · Exploration · Platformer

Dust: An Elysian Tail
Shared: Metroidvania · Platformer · RPG

Valdis Story: Abyssal City
Shared: Metroidvania · Platformer · Difficult

Celeste
Shared: Difficult · Platformer · Female Protagonist

Momodora: Moonlit Farewell
Shared: Metroidvania · Side Scroller · Action-Adventure

Rogue Legacy 2
Shared: Metroidvania · Platformer · Difficult

The Vagrant
Shared: Metroidvania · Female Protagonist · Side Scroller

Nine Sols
Shared: Metroidvania · Difficult · Platformer

ICEY
Shared: Side Scroller · Female Protagonist · Action

9 Years of Shadows
Shared: Metroidvania · Side Scroller · Platformer

Vigil: The Longest Night
Shared: Metroidvania · Side Scroller · Difficult

Salt and Sanctuary
Shared: Metroidvania · Difficult · Platformer

Timespinner
Shared: Metroidvania · Side Scroller · Female Protagonist

Blasphemous
Shared: Metroidvania · Difficult · 2D