Games like Souno's Curse
Games like Souno's Curse include Hollow Knight, Ori and the Will of the Wisps, Hollow Knight: Silksong, MIO: Memories in Orbit, and Constance. We matched them by the tags players give Souno's Curse on Steam (2D Platformer, Exploration, Adventure, Hand-drawn, and Platformer): closest matches first, and among equally close ones the better-known games.

Hollow Knight
Shared: Platformer · Exploration · 2D

Ori and the Will of the Wisps
Shared: Platformer · Adventure · Exploration

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

MIO: Memories in Orbit
Shared: Exploration · Platformer · Action-Adventure

Constance
Shared: Platformer · 2D · Action-Adventure

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

SANABI
Shared: 2D Platformer · Adventure · Action

Thank Goodness You're Here!
Shared: Adventure · Exploration · Hand-drawn

F.I.S.T.: Forged In Shadow Torch
Shared: Platformer · 2D Platformer · Adventure

Rain World
Shared: Exploration · Platformer · 2D Platformer

GRIS
Shared: Adventure · Hand-drawn · Platformer

Nine Sols
Shared: Platformer · Hand-drawn · 2D

The Darkest Tales — Into the Nightmare
Shared: Adventure · 2D Platformer · Platformer

Hoa
Shared: 2D Platformer · Hand-drawn · Exploration

Well Dweller
Shared: Adventure · Action-Adventure · Hand-drawn

Dust: An Elysian Tail
Shared: Platformer · Adventure · Action

Sonic Superstars
Shared: 2D Platformer · Adventure · Platformer

Neva
Shared: Adventure · Platformer · 2D Platformer

Monster Boy and the Cursed Kingdom
Shared: Adventure · Platformer · Exploration

Tomb Raider Game of the Year
Shared: Adventure · Exploration · Action

ANIMAL WELL
Shared: Exploration · Platformer · Adventure

ITORAH
Shared: 2D Platformer · Exploration · Platformer

Castlevania: Belmont's Curse
Shared: 2D Platformer · Platformer · Action

Rise of the Tomb Raider™
Shared: Adventure · Exploration · Action