Games like Ducky: The Brave
Games like Ducky: The Brave include Slime Rancher 2, Placid Plastic Duck Simulator, The Last Campfire, My Little Puppy, and Monument Valley. We matched them by the tags players give Ducky: The Brave on Steam (Difficult, Relaxing, Emotional, Physics, and Casual): closest matches first, and among equally close ones the better-known games.

Slime Rancher 2
Shared: Relaxing · Cute · Adventure

Placid Plastic Duck Simulator
Shared: Relaxing · Physics · Cute

The Last Campfire
Shared: Adventure · Emotional · Relaxing

My Little Puppy
Shared: Emotional · Adventure · Cute

Monument Valley
Shared: Relaxing · Adventure · Casual

ABZU
Shared: Relaxing · Atmospheric · Adventure

Chill with You : Lo-Fi Story
Shared: Relaxing · Casual · Atmospheric

Spirit of the North
Shared: Adventure · Casual · Atmospheric

Getting Over It with Bennett Foddy
Shared: Difficult · Physics · Singleplayer

Donut County
Shared: Casual · Physics · Cute

Kind Words (lo fi chill beats to write to)
Shared: Relaxing · Emotional · Casual

Slime Rancher
Shared: Cute · Adventure · Singleplayer

I Am Bread
Shared: Difficult · Physics · Adventure

Berry Bury Berry
Shared: Physics · 3D · Casual

Zup! S
Shared: Casual · Relaxing · Physics

Unpacking
Shared: Relaxing · Casual · Cute

A Short Hike
Shared: Relaxing · Adventure · Cute

Flower
Shared: Relaxing · Casual · Adventure

DAVE THE DIVER
Shared: Relaxing · Casual · Adventure

Brothers - A Tale of Two Sons
Shared: Adventure · Emotional · Atmospheric

Chained Together
Shared: Adventure · Casual · Physics

Exo One
Shared: Relaxing · Adventure · Atmospheric

Lil Gator Game
Shared: Relaxing · Casual · Cute

Hozy
Shared: Relaxing · Casual · Physics