Games like ADD
Games like ADD include LIMBO, Little Nightmares, Hollow Knight, GRIS, and INSIDE. We matched them by the tags players give ADD on Steam (2D, Platformer, Atmospheric, Adventure, and Puzzle Platformer): closest matches first, and among equally close ones the better-known games.

LIMBO
Shared: Platformer · Puzzle Platformer · 2D

Little Nightmares
Shared: Atmospheric · Adventure · Puzzle Platformer

Hollow Knight
Shared: Platformer · 2D · Atmospheric

GRIS
Shared: Atmospheric · Adventure · Platformer

INSIDE
Shared: Atmospheric · Puzzle Platformer · Dark

Rain World
Shared: Atmospheric · Platformer · 2D

Creepy Tale
Shared: Puzzle Platformer · Adventure · Platformer

Little Nightmares II
Shared: Adventure · Atmospheric · Dark

Valiant Hearts: The Great War™ / Soldats Inconnus : Mémoires de la Grande Guerre™
Shared: Atmospheric · Adventure · 2D

FAR: Lone Sails
Shared: Atmospheric · Adventure · Post-apocalyptic

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

Celeste
Shared: Platformer · 2D · 2D Platformer

Neva
Shared: Platformer · Atmospheric · Adventure

Mark of the Ninja
Shared: Platformer · 2D · Adventure

Seen
Shared: Adventure · Atmospheric · Dark

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

Nine Sols
Shared: 2D · Platformer · Atmospheric

SANABI
Shared: 2D · Adventure · 2D Platformer

Deadlight
Shared: Platformer · Adventure · Atmospheric

Owlboy
Shared: Platformer · Adventure · 2D

Pinstripe
Shared: Adventure · Atmospheric · Platformer

Nihilumbra
Shared: Platformer · Adventure · 2D

A Plague Tale: Innocence
Shared: Adventure · Atmospheric · Dark

Braid
Shared: Puzzle Platformer · Platformer · 2D