Games like Nocturne FX
Games like Nocturne FX include Vampire Survivors, Bit Blaster XL, Geometry Dash, Super Hexagon, and Cuphead. We matched them by the tags players give Nocturne FX on Steam (Side Scroller, Bullet Hell, Difficult, Arcade, and 2D): closest matches first, and among equally close ones the better-known games.
Vampire Survivors
Shared: Bullet Hell · 2D · Arcade
Bit Blaster XL
Shared: Bullet Hell · Difficult · Arcade
Geometry Dash
Shared: Difficult · 2D · Side Scroller
Super Hexagon
Shared: Difficult · Arcade · Indie
Cuphead
Shared: Difficult · 2D · Bullet Hell
A Dance of Fire and Ice
Shared: Difficult · 2D · Arcade
Rogue Legacy 2
Shared: Arcade · Difficult · Side Scroller
Hollow Knight: Silksong
Shared: Difficult · 2D · Indie
Hollow Knight
Shared: Difficult · 2D · Indie
Exit the Gungeon
Shared: Arcade · Bullet Hell · 2D
Touhou Luna Nights
Shared: Side Scroller · Difficult · Bullet Hell
LYNE
Shared: Difficult · Procedural Generation · Minimalist
To The Core
Shared: Arcade · 2D · Casual
Orbt XL
Shared: Difficult · Arcade · 2D
Timberman
Shared: Casual · 2D · Arcade
Enter the Gungeon
Shared: Bullet Hell · Difficult · 2D
LIMBO
Shared: 2D · Side Scroller · Indie
SUPER CHICKEN JUMPER
Shared: Difficult · Arcade · 2D
LUFTRAUSERS
Shared: Bullet Hell · Arcade · 2D
Jets'n'Guns Gold
Shared: Side Scroller · Bullet Hell · Difficult
Touhou Tenkuushou ~ Hidden Star in Four Seasons.
Shared: Bullet Hell · Difficult · Arcade
Spelunky
Shared: Difficult · 2D · Arcade
Windowkill
Shared: Bullet Hell · Arcade · 2D
oO
Shared: Difficult · Arcade · 2D