Games like GrappleWell
Games like GrappleWell include Celeste, Super Meat Boy, VVVVVV, Rain World, and Jump King. We matched them by the tags players give GrappleWell on Steam (Flight, Precision Platformer, 2D Platformer, Difficult, and Platformer): 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 · Difficult · Platformer

VVVVVV
Shared: Precision Platformer · 2D Platformer · Platformer

Rain World
Shared: Difficult · Platformer · Atmospheric

Jump King
Shared: Precision Platformer · Difficult · Platformer

SANABI
Shared: 2D Platformer · Pixel Graphics · 2D

Hollow Knight
Shared: Platformer · Difficult · 2D

Geometry Dash
Shared: Difficult · Precision Platformer · 2D

Downwell
Shared: Precision Platformer · Platformer · 2D Platformer

Hollow Knight: Silksong
Shared: Difficult · 2D · Platformer

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

Shovel Knight: Treasure Trove
Shared: Platformer · Pixel Graphics · 2D

Pizza Tower
Shared: 2D Platformer · Platformer · Pixel Graphics

Alex Kidd in Miracle World DX
Shared: Precision Platformer · 2D Platformer · Difficult

Katana ZERO
Shared: Pixel Graphics · Platformer · 2D Platformer

Noita
Shared: Difficult · Pixel Graphics · Physics

The Messenger
Shared: Platformer · Pixel Graphics · 2D

Ambidextro
Shared: Precision Platformer · 2D Platformer · Platformer

Webbed
Shared: 2D Platformer · Pixel Graphics · Platformer

Windswept
Shared: 2D Platformer · Precision Platformer · Difficult

Kitsune Tails
Shared: Precision Platformer · Difficult · Pixel Graphics

LIMBO
Shared: Platformer · 2D · Atmospheric

Cuphead
Shared: Difficult · Platformer · 2D

Dungeon Escape
Shared: Precision Platformer · 2D Platformer · Difficult