Games like Gluon
Games like Gluon include Haste, SEUM: Speedrunners from Hell, Geometry Dash, Hot Lava, and Neon White. We matched them by the tags players give Gluon on Steam (Precision Platformer, 3D Platformer, Runner, Action, and Racing): closest matches first, and among equally close ones the better-known games.

Haste
Shared: 3D Platformer · Action · Runner

SEUM: Speedrunners from Hell
Shared: 3D Platformer · Precision Platformer · Parkour

Geometry Dash
Shared: Precision Platformer · Rhythm · Platformer

Hot Lava
Shared: Precision Platformer · 3D Platformer · Racing

Neon White
Shared: 3D Platformer · Action · Parkour

ALTF4
Shared: Runner · 3D Platformer · Action

BIT.TRIP Presents... Runner2: Future Legend of Rhythm Alien
Shared: Precision Platformer · Runner · Rhythm

VHOLUME
Shared: 3D Platformer · Runner · Parkour

Only Climb: Better Together
Shared: Precision Platformer · 3D Platformer · Platformer

Mirror's Edge™ Catalyst
Shared: Runner · 3D Platformer · Parkour

Cyber Hook
Shared: 3D Platformer · Action · Parkour

Portal 2
Shared: Puzzle · Platformer · 3D Platformer

Super Meat Boy 3D
Shared: Precision Platformer · 3D Platformer · Action

Portal
Shared: 3D Platformer · Puzzle · Action

Clustertruck
Shared: Action · 3D Platformer · Parkour

White Knuckle
Shared: 3D Platformer · Precision Platformer · Parkour

Tomb Raider IV-VI Remastered
Shared: Action · 3D Platformer · Precision Platformer

Bomb Rush Cyberfunk
Shared: 3D Platformer · Action · Parkour

Mirror's Edge™
Shared: 3D Platformer · Parkour · Puzzle

BIT.TRIP RUNNER
Shared: Runner · Rhythm · Action

Boson X
Shared: Action · Runner · 3D Platformer

I wanna be the Creator
Shared: Action · Precision Platformer · Puzzle

Lunistice
Shared: 3D Platformer · Platformer · Precision Platformer

Marble It Up! Ultra
Shared: 3D Platformer · Racing · Action