Games like Ducky Runnerz
Games like Ducky Runnerz include Celeste, Super Meat Boy, Momodora: Reverie Under The Moonlight, Rain World, and Hollow Knight: Silksong. We matched them by the tags players give Ducky Runnerz on Steam (Precision Platformer, Side Scroller, Exploration, 2D Platformer, and Difficult): 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

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

Rain World
Shared: Difficult · Exploration · Platformer

Hollow Knight: Silksong
Shared: Difficult · Exploration · Platformer

Hollow Knight
Shared: Platformer · Difficult · Exploration

VVVVVV
Shared: Precision Platformer · 2D Platformer · Platformer

Geometry Dash
Shared: Difficult · Precision Platformer · 2D

Touhou Luna Nights
Shared: Side Scroller · Difficult · Exploration

SANABI
Shared: 2D Platformer · Action · 2D

Afterimage
Shared: 2D Platformer · Side Scroller · Exploration

Jump King
Shared: Precision Platformer · Difficult · Platformer

Prince of Persia The Lost Crown
Shared: Exploration · 2D Platformer · Side Scroller

Downwell
Shared: Precision Platformer · Platformer · 2D Platformer

Webbed
Shared: 2D Platformer · Exploration · Cute

Bō: Path of the Teal Lotus
Shared: Precision Platformer · Side Scroller · Exploration

Katana ZERO
Shared: Platformer · 2D Platformer · Action

Rabi-Ribi
Shared: Exploration · Female Protagonist · Side Scroller

Shovel Knight: Treasure Trove
Shared: Platformer · 2D · Difficult

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

Skul: The Hero Slayer
Shared: 2D · Action · Platformer

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

Gravity Circuit
Shared: Platformer · 2D Platformer · 2D

Will You Snail?
Shared: Precision Platformer · Difficult · 2D Platformer

