Games like Planet Cube: Edge
Games like Planet Cube: Edge include Celeste, Super Meat Boy, Geometry Dash, SANABI, and Downwell. We matched them by the tags players give Planet Cube: Edge on Steam (Side Scroller, Precision Platformer, 2D Platformer, Hero Shooter, and Collectathon): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Precision Platformer · Difficult · 2D Platformer

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

Geometry Dash
Shared: Difficult · Precision Platformer · 2D

SANABI
Shared: 2D Platformer · Action · 2D

Downwell
Shared: Precision Platformer · 2D Platformer · Platformer

Momodora: Reverie Under The Moonlight
Shared: Side Scroller · 2D Platformer · Difficult

VVVVVV
Shared: Precision Platformer · 2D Platformer · Platformer

Thomas Was Alone
Shared: Side Scroller · 2D Platformer · Precision Platformer

Jump King
Shared: Precision Platformer · Difficult · Platformer

Rogue Legacy 2
Shared: Platformer · Arcade · Difficult

Huntdown
Shared: Side Scroller · Shooter · Precision Platformer

Bread & Fred
Shared: 2D Platformer · Precision Platformer · Difficult

Broforce
Shared: Side Scroller · Platformer · 2D

Hollow Knight
Shared: Platformer · Difficult · 2D

Blasphemous 2
Shared: Difficult · Side Scroller · 2D Platformer

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

Spelunky 2
Shared: 2D Platformer · Platformer · Difficult

Rain World
Shared: Difficult · Platformer · 2D Platformer

Kero Blaster
Shared: Side Scroller · Platformer · Difficult

Shovel Knight: Treasure Trove
Shared: Platformer · Side Scroller · Difficult

Anomaly Agent
Shared: Side Scroller · 2D Platformer · Platformer

Symphonia
Shared: Precision Platformer · Difficult · 2D Platformer

Nitro Express
Shared: Side Scroller · 2D Platformer · Shooter

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