Games like Cosmophony
Games like Cosmophony include A Dance of Fire and Ice, Geometry Dash, Super Hexagon, Beat Saber, and Just Shapes & Beats. We matched them by the tags players give Cosmophony on Steam (Indie, Action, Music, Difficult, and Fast-Paced): closest matches first, and among equally close ones the better-known games.

A Dance of Fire and Ice
Shared: Music · Difficult · Indie

Geometry Dash
Shared: Music · Difficult · Rhythm

Super Hexagon
Shared: Indie · Difficult · Fast-Paced

Beat Saber
Shared: Music · Rhythm · Fast-Paced

Just Shapes & Beats
Shared: Music · Rhythm · Difficult

Intralism
Shared: Indie · Music · Rhythm

Thumper
Shared: Indie · Action · Rhythm

Spin Rhythm XD
Shared: Music · Indie · Rhythm

Rift of the NecroDancer
Shared: Indie · Music · Rhythm

BPM: BULLETS PER MINUTE
Shared: Action · Indie · Rhythm

Hotline Miami
Shared: Action · Indie · Fast-Paced

Muse Dash
Shared: Music · Rhythm · Indie

Music Racer
Shared: Indie · Music · Action

Rhythm Doctor
Shared: Music · Indie · Rhythm

One Finger Death Punch
Shared: Action · Indie · Fast-Paced

Crypt of the NecroDancer
Shared: Indie · Rhythm · Difficult

64.0
Shared: Indie · Action · Difficult

DJMAX RESPECT V
Shared: Music · Action · Rhythm

Devil Daggers
Shared: Indie · Difficult · Action

Hotline Miami 2: Wrong Number
Shared: Action · Fast-Paced · Difficult

Savant - Ascent
Shared: Indie · Action · Music

Hextech Mayhem: A League of Legends Story™
Shared: Music · Action · Rhythm

Electronic Super Joy
Shared: Indie · Difficult · Music

Ape Out
Shared: Indie · Action · Fast-Paced