Games like Negative World
Games like Negative World include LIMBO, Hollow Knight, Ori and the Will of the Wisps, Dust: An Elysian Tail, and GRIS. We matched them by the tags players give Negative World on Steam (Action, Adventure, Indie, Free to Play, and Puzzle Platformer): closest matches first, and among equally close ones the better-known games.

LIMBO
Shared: Indie · Puzzle Platformer · Platformer

Hollow Knight
Shared: Platformer · Indie · 2D

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

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

GRIS
Shared: Indie · Adventure · Platformer

Out There Somewhere
Shared: Indie · Adventure · Platformer

BEEP
Shared: Indie · Adventure · Platformer

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

Seen
Shared: Indie · Adventure · Action

Portal 2
Shared: Platformer · Singleplayer · Puzzle Platformer

FEZ
Shared: Indie · Platformer · Adventure

Defy Gravity Extended
Shared: Indie · Puzzle Platformer · Platformer

Shovel Knight: Treasure Trove
Shared: Platformer · Indie · Adventure

Himno
Shared: Free to Play · Adventure · Platformer

Planet of Lana
Shared: Action · Puzzle Platformer · Adventure

MO:Astray
Shared: Action · Indie · Adventure

Unravel
Shared: Action · Adventure · Puzzle

Pikuniku
Shared: Adventure · Indie · Action

Skul: The Hero Slayer
Shared: Action · Indie · 2D

Oddworld: New 'n' Tasty
Shared: Adventure · Puzzle Platformer · Platformer

Little Nightmares
Shared: Adventure · Puzzle Platformer · Indie

The Last Campfire
Shared: Adventure · Indie · Puzzle

Nihilumbra
Shared: Adventure · Indie · Platformer

Celeste
Shared: Indie · Platformer · Adventure