Games like The Portal Trial
Games like The Portal Trial include Celeste, SANABI, Super Meat Boy, Katana ZERO, and VVVVVV. We matched them by the tags players give The Portal Trial on Steam (Precision Platformer, Platformer, 2D Platformer, Story Rich, and Pixel Graphics): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Precision Platformer · Pixel Graphics · Platformer

SANABI
Shared: Story Rich · Pixel Graphics · 2D Platformer

Super Meat Boy
Shared: Precision Platformer · Platformer · 2D Platformer

Katana ZERO
Shared: Pixel Graphics · Platformer · Story Rich

VVVVVV
Shared: Precision Platformer · Platformer · Pixel Graphics

Pizza Tower
Shared: 2D Platformer · Platformer · Fast-Paced

Downwell
Shared: Precision Platformer · Platformer · Pixel Graphics

Hollow Knight: Silksong
Shared: Platformer · Difficult · Singleplayer

Portal 2
Shared: Platformer · Singleplayer · Story Rich

Hollow Knight
Shared: Platformer · Difficult · Singleplayer

Jump King
Shared: Precision Platformer · Platformer · Pixel Graphics

Rusted Moss
Shared: Platformer · Pixel Graphics · Story Rich

Kitsune Tails
Shared: Precision Platformer · Pixel Graphics · Platformer

The End Is Nigh
Shared: Precision Platformer · Platformer · Singleplayer

Will You Snail?
Shared: Precision Platformer · Story Rich · 2D Platformer

Iconoclasts
Shared: Pixel Graphics · Female Protagonist · Platformer

Freedom Planet
Shared: Platformer · Female Protagonist · Pixel Graphics

Geometry Dash
Shared: Precision Platformer · Platformer · Difficult

Planet of Lana
Shared: 2D Platformer · Female Protagonist · Platformer

Gravity Circuit
Shared: Platformer · Pixel Graphics · 2D Platformer

Tomb Raider Game of the Year
Shared: Female Protagonist · Story Rich · Adventure

Owlboy
Shared: Platformer · Pixel Graphics · Story Rich

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

Thomas Was Alone
Shared: Platformer · Precision Platformer · 2D Platformer