Games like reflex runner
Games like reflex runner include Celeste, Super Meat Boy, SANABI, Ori and the Will of the Wisps, and Hollow Knight. We matched them by the tags players give reflex runner on Steam (Action, Adventure, Platformer, 2D Platformer, and Precision Platformer): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Precision Platformer · Platformer · 2D Platformer

Super Meat Boy
Shared: Platformer · Precision Platformer · 2D Platformer

SANABI
Shared: Action · Adventure · 2D Platformer

Ori and the Will of the Wisps
Shared: Platformer · Action · Adventure

Hollow Knight
Shared: Platformer · Singleplayer · Adventure

Sonic Origins
Shared: Action · Adventure · 2D Platformer

Dust: An Elysian Tail
Shared: Action · Platformer · Adventure

Pizza Tower
Shared: 2D Platformer · Platformer · Action

Planet of Lana
Shared: Action · 2D Platformer · Platformer

VVVVVV
Shared: Platformer · Precision Platformer · 2D Platformer

Geometry Dash
Shared: Precision Platformer · Platformer · Singleplayer

Downwell
Shared: Precision Platformer · Platformer · Action

Sonic Superstars
Shared: Action · Platformer · Adventure

Jump King
Shared: Precision Platformer · Adventure · Platformer

BEEP
Shared: Adventure · Platformer · Action

SONIC X SHADOW GENERATIONS
Shared: Action · Platformer · Adventure

The End Is Nigh
Shared: Platformer · Precision Platformer · Adventure

Kao the Kangaroo: Round 2 (2003 re-release)
Shared: Adventure · Action · Platformer

Pikuniku
Shared: Adventure · Action · Indie

Webbed
Shared: 2D Platformer · Platformer · Cute

Rogue Legacy 2
Shared: Action · Platformer · Adventure

Skul: The Hero Slayer
Shared: Action · Platformer · Indie

Katana ZERO
Shared: Action · Platformer · 2D Platformer

F.I.S.T.: Forged In Shadow Torch
Shared: Action · Platformer · Adventure