Games like Duck Souls
Games like Duck Souls include Hollow Knight, Hollow Knight: Silksong, Skul: The Hero Slayer, Blasphemous, and Nine Sols. We matched them by the tags players give Duck Souls on Steam (Indie, Action, Adventure, Casual, and Platformer): closest matches first, and among equally close ones the better-known games.

Hollow Knight
Shared: Platformer · Indie · 2D

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

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

Blasphemous
Shared: Indie · Pixel Graphics · Souls-like

Nine Sols
Shared: Action · Platformer · 2D

Celeste
Shared: Indie · Pixel Graphics · Difficult

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

SANABI
Shared: Action · Pixel Graphics · Adventure

Broforce
Shared: Action · Pixel Graphics · Indie

Titan Souls
Shared: Indie · Adventure · Action

Jump King
Shared: Indie · Adventure · Difficult

Dead Cells
Shared: Adventure · 2D · Pixel Graphics

Katana ZERO
Shared: Action · Pixel Graphics · Indie

UFO 50
Shared: Indie · Action · Pixel Graphics

Minimalism
Shared: Indie · Action · Casual

Out There Somewhere
Shared: Indie · Platformer · Adventure

Rain World
Shared: Indie · Difficult · Platformer

BEEP
Shared: Indie · Adventure · Platformer

Super Meat Boy
Shared: Indie · Platformer · Difficult

Angry Video Game Nerd Adventures
Shared: Indie · Action · Platformer

Timberman
Shared: Indie · Casual · Action

Blasphemous 2
Shared: Adventure · Difficult · Pixel Graphics

Hyper Light Drifter
Shared: Indie · Adventure · Pixel Graphics

Gato Roboto
Shared: Indie · Action · Adventure