Games like Sunward
Games like Sunward include Chained Together, Refunct, Pseudoregalia, A Short Hike, and GRIS. We matched them by the tags players give Sunward on Steam (Adventure, Casual, Platformer, 3D Platformer, and 3D): closest matches first, and among equally close ones the better-known games.

Chained Together
Shared: Adventure · Platformer · Casual

Refunct
Shared: 3D Platformer · Casual · Platformer

Pseudoregalia
Shared: 3D Platformer · Platformer · 3D

A Short Hike
Shared: Adventure · Casual · Relaxing

GRIS
Shared: Adventure · Platformer · Female Protagonist

Monument Valley
Shared: Adventure · Casual · Relaxing

DAVE THE DIVER
Shared: Casual · Adventure · Relaxing

A Hat in Time
Shared: 3D Platformer · Adventure · Platformer

Journey
Shared: Adventure · Relaxing · Casual

Wavetale
Shared: Adventure · 3D Platformer · Platformer

A Story About My Uncle
Shared: Adventure · Platformer · 3D Platformer

Sonic Frontiers
Shared: Adventure · 3D Platformer · 3D

Bomb Rush Cyberfunk
Shared: Adventure · 3D Platformer · Stylized

Portal 2
Shared: Platformer · 3D Platformer · Adventure

Funi Raccoon Game
Shared: Adventure · Casual · 3D Platformer

FEZ
Shared: Platformer · Adventure · Casual

Kao the Kangaroo: Round 2 (2003 re-release)
Shared: Adventure · Casual · 3D Platformer

Slime Rancher 2
Shared: Adventure · Relaxing · Casual

Florence
Shared: Casual · Adventure · Indie

Sonic Adventure DX
Shared: Platformer · Adventure · 3D Platformer

Mirror 2: Project X
Shared: 3D · Casual · Female Protagonist

Grow Up
Shared: Adventure · Casual · 3D Platformer

Hollow Knight: Silksong
Shared: Platformer · Adventure · Indie

Spirit of the North
Shared: Adventure · Casual · 3D Platformer