Games like Arwinia
Games like Arwinia include Shovel Knight: Treasure Trove, SANABI, Blasphemous 2, Dead Cells, and Dust: An Elysian Tail. We matched them by the tags players give Arwinia on Steam (Action, Adventure, Platformer, 2D Platformer, and Metroidvania): closest matches first, and among equally close ones the better-known games.

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

SANABI
Shared: Action · Adventure · Pixel Graphics

Blasphemous 2
Shared: Adventure · Metroidvania · Fantasy

Dead Cells
Shared: Adventure · Metroidvania · 2D

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

Skul: The Hero Slayer
Shared: Action · Pixel Graphics · 2D

Hollow Knight
Shared: Platformer · Metroidvania · 2D

The Messenger
Shared: Platformer · Metroidvania · Action

Katana ZERO
Shared: Action · Platformer · Pixel Graphics

Owlboy
Shared: Adventure · Platformer · Pixel Graphics

Bloodstained: Curse of the Moon
Shared: Action · Platformer · Pixel Graphics

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

Gato Roboto
Shared: Action · Adventure · Metroidvania

Axiom Verge
Shared: Metroidvania · Platformer · Action

Rogue Legacy 2
Shared: Action · Platformer · Metroidvania

Blasphemous
Shared: Metroidvania · Pixel Graphics · 2D

Celeste
Shared: Platformer · Pixel Graphics · 2D Platformer

Rogue Legacy
Shared: Platformer · Action · 2D

F.I.S.T.: Forged In Shadow Torch
Shared: Action · Platformer · Metroidvania

Sonic Origins
Shared: Action · Adventure · 2D Platformer

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

Broforce
Shared: Action · Platformer · Pixel Graphics

Phoenotopia: Awakening
Shared: Action · Adventure · Platformer

Momodora: Reverie Under The Moonlight
Shared: 2D Platformer · Metroidvania · Pixel Graphics