Games like Sky Reach
Games like Sky Reach include Super Meat Boy, N++ (NPLUSPLUS), Celeste, Downwell, and Super Hexagon. We matched them by the tags players give Sky Reach on Steam (Precision Platformer, Arcade, Score Attack, Cyberpunk, and Futuristic): closest matches first, and among equally close ones the better-known games.

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

N++ (NPLUSPLUS)
Shared: Precision Platformer · 2D Platformer · Local Co-Op

Celeste
Shared: Precision Platformer · Difficult · 2D Platformer

Downwell
Shared: Precision Platformer · Arcade · 2D Platformer

Super Hexagon
Shared: Arcade · Difficult · Fast-Paced

Geometry Dash
Shared: Precision Platformer · Difficult · Arcade

Katana ZERO
Shared: Cyberpunk · 2D Platformer · Action

oO
Shared: Arcade · Precision Platformer · Difficult

SANABI
Shared: Cyberpunk · 2D Platformer · Action

Ghostrunner
Shared: Cyberpunk · Fast-Paced · Difficult

Bloody Trapland
Shared: Precision Platformer · Local Co-Op · 2D Platformer

Bread & Fred
Shared: Local Co-Op · Precision Platformer · 2D Platformer

Orbt XL
Shared: Arcade · Score Attack · Difficult

VVVVVV
Shared: Precision Platformer · 2D Platformer · Difficult

Dustforce DX
Shared: Precision Platformer · Difficult · Score Attack

Ding Dong XL
Shared: Arcade · Cyberpunk · Difficult

MULLET MADJACK
Shared: Arcade · Cyberpunk · Fast-Paced

Huntdown
Shared: Local Co-Op · Cyberpunk · Arcade

Spelunky
Shared: Arcade · Difficult · Local Co-Op

Timberman
Shared: Arcade · Casual · Difficult

Super Meat Boy Forever
Shared: Precision Platformer · Difficult · Indie

Broforce
Shared: Local Co-Op · Action · Platformer

Rogue Legacy 2
Shared: Arcade · Platformer · Difficult

Only Climb: Better Together
Shared: Precision Platformer · Arcade · Difficult