Games like Sylv and the Ancient Tree
Games like Sylv and the Ancient Tree include Ori and the Will of the Wisps, Rogue Legacy 2, Bloodstained: Ritual of the Night, Monster Boy and the Cursed Kingdom, and Dust: An Elysian Tail. We matched them by the tags players give Sylv and the Ancient Tree on Steam (Action, Adventure, Action-Adventure, Arcade, and Platformer): closest matches first, and among equally close ones the better-known games.

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

Rogue Legacy 2
Shared: Action · Arcade · Platformer

Bloodstained: Ritual of the Night
Shared: Action · Adventure · Metroidvania

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

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

Hollow Knight
Shared: Platformer · Metroidvania · Adventure

Rabi-Ribi
Shared: Metroidvania · Action-Adventure · Exploration

Touhou Luna Nights
Shared: Side Scroller · Metroidvania · Platformer

Well Dweller
Shared: Action-Adventure · Action · Adventure

Skul: The Hero Slayer
Shared: Action · Platformer · 2D

Gato Roboto
Shared: Action · Adventure · Metroidvania

ICEY
Shared: Action · Adventure · Side Scroller

9 Years of Shadows
Shared: Platformer · Side Scroller · Metroidvania

Momodora: Reverie Under The Moonlight
Shared: Side Scroller · Metroidvania · Exploration

UnEpic
Shared: Action · Platformer · Metroidvania

Hollow Knight: Silksong
Shared: Metroidvania · Platformer · Adventure

Afterimage
Shared: Metroidvania · Side Scroller · Exploration

SANABI
Shared: Action · Adventure · Action-Adventure

Dungeon Munchies
Shared: Action · Adventure · Indie

Prince of Persia The Lost Crown
Shared: Action · Adventure · Exploration

Rogue Legacy
Shared: Action · Platformer · Metroidvania

Constance
Shared: Action · Platformer · Action-Adventure

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

The Vagrant
Shared: Action · Adventure · Side Scroller