Games like Boyce the Voice
Games like Boyce the Voice include Trombone Champ, Muse Dash, Rhythm Doctor, Melatonin, and A Dance of Fire and Ice. We matched them by the tags players give Boyce the Voice on Steam (Rhythm, Music, Surreal, Colorful, and Tutorial): closest matches first, and among equally close ones the better-known games.

Trombone Champ
Shared: Rhythm · Music · Comedy

Muse Dash
Shared: Rhythm · Music · Cute

Rhythm Doctor
Shared: Rhythm · Music · Action

Melatonin
Shared: Rhythm · Colorful · Music

A Dance of Fire and Ice
Shared: Rhythm · Music · Colorful

Geometry Dash
Shared: Music · Rhythm · Colorful

Bits & Bops
Shared: Rhythm · Music · Action

DJMAX RESPECT V
Shared: Rhythm · Music · Action

Rift of the NecroDancer
Shared: Rhythm · Music · Colorful

Wandersong
Shared: Music · Comedy · Colorful

CHUCHEL
Shared: Comedy · Colorful · Cartoon

Sayonara Wild Hearts
Shared: Rhythm · Music · Action

Just Shapes & Beats
Shared: Rhythm · Music · Action

Hi-Fi RUSH
Shared: Rhythm · Action · Music

Katamari Damacy REROLL
Shared: Surreal · Colorful · Action

Everhood
Shared: Music · Surreal · Rhythm

Music Racer
Shared: Rhythm · Music · Action

Disaster Band
Shared: Rhythm · Music · Comedy

EZ2ON REBOOT : R
Shared: Rhythm · Music · Action

Lost in Play
Shared: Surreal · Colorful · 2D

AudioSurf
Shared: Rhythm · Music · Colorful

Spin Rhythm XD
Shared: Rhythm · Music · Action

Hatsune Miku: Project DIVA Mega Mix+
Shared: Rhythm · Music · Cute

Incredibox
Shared: Rhythm · Music · 2D