Games like Synthularity
Games like Synthularity include Shelldiver, Vampire Survivors, Nodebuster, A Dance of Fire and Ice, and Cookie Clicker. We matched them by the tags players give Synthularity on Steam (Action, Casual, Rhythm, Idler, and Bullet Hell): closest matches first, and among equally close ones the better-known games.
Shelldiver
Shared: Casual · Idler · Management
Vampire Survivors
Shared: Bullet Hell · 2D · Casual
Nodebuster
Shared: Casual · Idler · 2D
A Dance of Fire and Ice
Shared: Rhythm · 2D · Casual
Cookie Clicker
Shared: Casual · Idler · Management
DJMAX RESPECT V
Shared: Rhythm · Casual · Action
Muse Dash
Shared: Rhythm · Casual · 2D
Just Shapes & Beats
Shared: Rhythm · Bullet Hell · Action
Beat Hazard
Shared: Rhythm · Bullet Hell · Action
20 Minutes Till Dawn
Shared: Bullet Hell · Combat · Casual
Bills Must Be Paid
Shared: Idler · Casual · Strategy
Idle Champions of the Forgotten Realms
Shared: Idler · Casual · Action
Megabonk
Shared: Action · Bullet Hell · Roguelite
Rhythm Doctor
Shared: Rhythm · Action · 2D
ShellShock Live
Shared: Action · 2D · Casual
Geometry Dash
Shared: Rhythm · 2D · Colorful
Chef Knight
Shared: Casual · Idler · Action
A Game About Feeding A Black Hole
Shared: Casual · Idler · 2D
BALL x PIT
Shared: Action · Bullet Hell · Roguelite
(the) Gnorp Apologue
Shared: Idler · Casual · Management
Melvor Idle
Shared: Casual · Idler · 2D
Game Dev Tycoon
Shared: Casual · Management · 2D
Sixtar Gate: STARTRAIL
Shared: Action · Casual · Rhythm
Timber Rush
Shared: Casual · Idler · Action