Games like Ronny's Climb
Games like Ronny's Climb include Celeste, Super Meat Boy, SANABI, Downwell, and Jump King. We matched them by the tags players give Ronny's Climb on Steam (Pixel Graphics, Adventure, 2D Platformer, Precision Platformer, and Fantasy): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Pixel Graphics · Precision Platformer · Difficult

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

SANABI
Shared: Pixel Graphics · 2D Platformer · Adventure

Downwell
Shared: Pixel Graphics · Precision Platformer · 2D Platformer

Jump King
Shared: Pixel Graphics · Precision Platformer · Adventure

VVVVVV
Shared: Pixel Graphics · Precision Platformer · 2D Platformer

Blasphemous 2
Shared: Fantasy · Adventure · Pixel Graphics

Shovel Knight: Treasure Trove
Shared: Pixel Graphics · Adventure · Platformer

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

Rain World
Shared: Pixel Graphics · Difficult · Adventure

Webbed
Shared: Pixel Graphics · 2D Platformer · Adventure

Exit the Gungeon
Shared: Adventure · Pixel Graphics · Arcade

Kitsune Tails
Shared: Pixel Graphics · Precision Platformer · Fantasy

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

Owlboy
Shared: Pixel Graphics · Adventure · Fantasy

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

SUPER CHICKEN JUMPER
Shared: Pixel Graphics · Difficult · Arcade

Bread & Fred
Shared: Pixel Graphics · 2D Platformer · Precision Platformer

Momodora: Reverie Under The Moonlight
Shared: 2D Platformer · Pixel Graphics · Difficult

Skul: The Hero Slayer
Shared: Pixel Graphics · Action · Indie

UFO 50
Shared: Pixel Graphics · Adventure · Arcade

Sonic Origins
Shared: Adventure · 2D Platformer · Pixel Graphics

Super Mombo Quest
Shared: Adventure · Precision Platformer · Action

Rogue Legacy 2
Shared: Arcade · Adventure · Action