Games like Super Rhythm Duel
Games like Super Rhythm Duel include Geometry Dash, A Dance of Fire and Ice, Rift of the NecroDancer, Super Hexagon, and Hollow Knight: Silksong. We matched them by the tags players give Super Rhythm Duel on Steam (Rhythm, RPG, Arcade, 2D Fighter, and 2D): closest matches first, and among equally close ones the better-known games.

Geometry Dash
Shared: Rhythm · Difficult · 2D

A Dance of Fire and Ice
Shared: Rhythm · Difficult · Arcade

Rift of the NecroDancer
Shared: Rhythm · Arcade · Difficult

Super Hexagon
Shared: Difficult · Arcade · Rhythm

Hollow Knight: Silksong
Shared: Difficult · 2D · Indie

Muse Dash
Shared: Rhythm · Female Protagonist · 2D

Crypt of the NecroDancer
Shared: Rhythm · Difficult · RPG

One Finger Death Punch
Shared: 2D Fighter · 2D · Action

Just Shapes & Beats
Shared: Rhythm · Difficult · 2D

UFO 50
Shared: Arcade · 2D · RPG

Rogue Legacy 2
Shared: Arcade · RPG · Difficult

ENDER LILIES: Quietus of the Knights
Shared: Female Protagonist · 2D · Difficult

Darkest Dungeon®
Shared: RPG · Turn-Based Combat · Difficult

Hollow Knight
Shared: Difficult · 2D · Singleplayer

64.0
Shared: Rhythm · Difficult · 2D

Celeste
Shared: Difficult · 2D · Female Protagonist

Shovel Knight: Treasure Trove
Shared: 2D · Retro · Difficult

Cuphead
Shared: Difficult · 2D · Great Soundtrack

Hatsune Miku: Project DIVA Mega Mix+
Shared: Rhythm · Arcade · Female Protagonist

Hotline Miami 2: Wrong Number
Shared: Difficult · Great Soundtrack · Retro

CrossCode
Shared: RPG · Female Protagonist · 2D

DJMAX RESPECT V
Shared: Rhythm · 2D · Arcade

Indivisible
Shared: RPG · Female Protagonist · 2D

Melatonin
Shared: Rhythm · 2D · Indie