Games like Xeno's Adventure
Games like Xeno's Adventure include SANABI, Ori and the Will of the Wisps, Owlboy, Sonic Superstars, and Celeste. We matched them by the tags players give Xeno's Adventure on Steam (Adventure, Action, Action-Adventure, Platformer, and 2D Platformer): closest matches first, and among equally close ones the better-known games.

SANABI
Shared: Action · Adventure · 2D Platformer

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

Owlboy
Shared: Adventure · Platformer · Pixel Graphics

Sonic Superstars
Shared: Action · Adventure · Platformer

Celeste
Shared: Platformer · 2D Platformer · Pixel Graphics

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

BlazBlue Entropy Effect
Shared: Action · Action-Adventure · Platformer

Trine 5: A Clockwork Conspiracy
Shared: Adventure · Action · Platformer

Mina the Hollower
Shared: Action-Adventure · 2D Platformer · Platformer

Katana ZERO
Shared: Action · Platformer · Pixel Graphics

Pizza Tower
Shared: 2D Platformer · Platformer · Action

Hollow Knight
Shared: Platformer · 2D · Adventure

Shovel Knight: Treasure Trove
Shared: Platformer · Adventure · Action

Pumpkin Jack
Shared: Adventure · Action · Colorful

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

Dead Cells
Shared: Adventure · 2D · Pixel Graphics

Shiro
Shared: Adventure · Action · Platformer

Sonic Mania
Shared: Platformer · 2D · Adventure

Neva
Shared: Adventure · Platformer · Atmospheric

Rain World
Shared: Platformer · Adventure · Atmospheric

Zombotron
Shared: Action · Adventure · 2D

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

Trine Enchanted Edition
Shared: Action-Adventure · 2D Platformer · Colorful

Phoenotopia: Awakening
Shared: Adventure · Action · Platformer