Games like I AM DIE
Games like I AM DIE include Portal 2, Portal, The Last Campfire, LIMBO, and Unpacking. We matched them by the tags players give I AM DIE on Steam (Puzzle, Casual, 3D Platformer, Music-Based Procedural Generation, and Puzzle Platformer): closest matches first, and among equally close ones the better-known games.

Portal 2
Shared: Puzzle · Platformer · Singleplayer

Portal
Shared: Puzzle · 3D Platformer · Puzzle Platformer

The Last Campfire
Shared: Puzzle · Singleplayer · Cute

LIMBO
Shared: Puzzle · Puzzle Platformer · Platformer

Unpacking
Shared: Casual · Puzzle · Cute

Refunct
Shared: 3D Platformer · Casual · Puzzle Platformer

Assemble with Care
Shared: Casual · Puzzle · Singleplayer

Is This Seat Taken?
Shared: Puzzle · Casual · Cute

Trine 2: Complete Story
Shared: Puzzle Platformer · Puzzle · Platformer

Slime Rancher 2
Shared: Singleplayer · Cute · Casual

FEZ
Shared: Puzzle · Platformer · Casual

LEGO® Builder's Journey
Shared: Casual · Puzzle · Cute

A Little to the Left
Shared: Puzzle · Casual · Cute

Donut County
Shared: Casual · Puzzle · Cute

Tinykin
Shared: 3D Platformer · Puzzle · Family Friendly

Spirit of the North
Shared: Puzzle · Casual · Atmospheric

Chained Together
Shared: Casual · Platformer · Puzzle Platformer

Shady Part of Me
Shared: Puzzle · Platformer · 3D Platformer

Toki Tori
Shared: Puzzle · Casual · Platformer

Planet of Lana
Shared: Puzzle Platformer · Puzzle · Atmospheric

Unravel
Shared: Puzzle · Family Friendly · Singleplayer

Little Nightmares
Shared: Puzzle · Puzzle Platformer · Atmospheric

Trine 3: The Artifacts of Power
Shared: 3D Platformer · Puzzle Platformer · Puzzle

A Story About My Uncle
Shared: Singleplayer · Puzzle · 3D Platformer