Games like ZET
Games like ZET include Celeste, Hollow Knight, Katana ZERO, SANABI, and Hollow Knight: Silksong. We matched them by the tags players give ZET on Steam (Indie, Casual, Action, Adventure, and Platformer): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Indie · Platformer · Great Soundtrack

Hollow Knight
Shared: Platformer · Indie · Great Soundtrack

Katana ZERO
Shared: Action · Indie · Pixel Graphics

SANABI
Shared: Action · Story Rich · Pixel Graphics

Hollow Knight: Silksong
Shared: Indie · Great Soundtrack · Difficult

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

To the Moon
Shared: Indie · Story Rich · Great Soundtrack

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

Hyper Light Drifter
Shared: Indie · Adventure · Great Soundtrack

Skul: The Hero Slayer
Shared: Indie · Action · Pixel Graphics

Pizza Tower
Shared: Indie · Great Soundtrack · Platformer

OneShot
Shared: Indie · Story Rich · Pixel Graphics

GRIS
Shared: Indie · Adventure · Great Soundtrack

Geometry Dash
Shared: Difficult · Great Soundtrack · Platformer

Iconoclasts
Shared: Indie · Action · Adventure

FEZ
Shared: Indie · Platformer · Casual

Bastion
Shared: Indie · Action · Great Soundtrack

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

There Is No Game: Wrong Dimension
Shared: Indie · Adventure · Casual

MO:Astray
Shared: Indie · Action · Adventure

Out There Somewhere
Shared: Indie · Platformer · Adventure

Hotline Miami
Shared: Indie · Action · Great Soundtrack

BEEP
Shared: Indie · Adventure · Platformer

Super Meat Boy
Shared: Indie · Platformer · Difficult