Games like Trapformer
Games like Trapformer include Celeste, SANABI, Super Meat Boy, Braid, and Hollow Knight. We matched them by the tags players give Trapformer on Steam (2D Platformer, Casual, Puzzle Platformer, Difficult, and Adventure): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Difficult · 2D Platformer · Platformer

SANABI
Shared: 2D Platformer · Adventure · Pixel Graphics

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

Braid
Shared: 2D Platformer · Puzzle Platformer · Platformer

Hollow Knight
Shared: Difficult · Platformer · 2D

LIMBO
Shared: Puzzle Platformer · Platformer · Adventure

Rain World
Shared: Difficult · Platformer · 2D

Hollow Knight: Silksong
Shared: Difficult · 2D · Platformer

Webbed
Shared: 2D Platformer · Puzzle Platformer · Pixel Graphics

Squishy the Suicidal Pig
Shared: Puzzle Platformer · Platformer · Adventure

Laughing to Die
Shared: Casual · 2D Platformer · Adventure

FEZ
Shared: Platformer · Casual · Adventure

Pizza Tower
Shared: 2D Platformer · Platformer · Indie

VVVVVV
Shared: 2D Platformer · Platformer · Difficult

Munin
Shared: Casual · Puzzle Platformer · Adventure

Nihilumbra
Shared: Casual · Adventure · Puzzle Platformer

Defy Gravity Extended
Shared: Puzzle Platformer · Platformer · 2D

Downwell
Shared: 2D Platformer · Platformer · Pixel Graphics

Katana ZERO
Shared: 2D Platformer · Platformer · Pixel Graphics

Öoo
Shared: 2D Platformer · Puzzle Platformer · 2D

Planet of Lana
Shared: Puzzle Platformer · 2D Platformer · Platformer

Chained Together
Shared: Casual · Adventure · Platformer

Shovel Knight: Treasure Trove
Shared: Platformer · Adventure · 2D

Out There Somewhere
Shared: Platformer · Adventure · 2D