Games like Thunder Paw - hardy mode
Games like Thunder Paw - hardy mode include Hollow Knight, Ori and the Will of the Wisps, Deadlight, Dust: An Elysian Tail, and LIMBO. We matched them by the tags players give Thunder Paw - hardy mode on Steam (Action, Adventure, Indie, Platformer, and Atmospheric): closest matches first, and among equally close ones the better-known games.

Hollow Knight
Shared: Platformer · Indie · Adventure

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

Deadlight
Shared: Action · Platformer · Indie

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

LIMBO
Shared: Indie · Platformer · Adventure

MO:Astray
Shared: Action · Indie · Adventure

GRIS
Shared: Indie · Atmospheric · Adventure

Seen
Shared: Indie · Adventure · Action

Pumpkin Jack
Shared: Action · Adventure · Indie

Neva
Shared: Adventure · Indie · Platformer

Mark of the Ninja
Shared: Platformer · Indie · Action

Hollow Knight: Silksong
Shared: Indie · Platformer · Adventure

Planet of Lana
Shared: Action · Atmospheric · Adventure

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

Nine Sols
Shared: Action · Platformer · Indie

SANABI
Shared: Action · Adventure · Indie

Deliver Us The Moon
Shared: Adventure · Action · Indie

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

A Story About My Uncle
Shared: Adventure · Indie · Atmospheric

Owlboy
Shared: Adventure · Indie · Platformer

Rogue Legacy 2
Shared: Action · Platformer · Indie

Skul: The Hero Slayer
Shared: Action · Indie · Platformer

FAR: Lone Sails
Shared: Adventure · Atmospheric · Indie

Little Nightmares
Shared: Adventure · Atmospheric · Indie