Games like LIO
Games like LIO include INSIDE, LIMBO, Little Nightmares, Portal 2, and Seen. We matched them by the tags players give LIO on Steam (Dark, Platformer, Visual Novel, Puzzle, and Abstract): closest matches first, and among equally close ones the better-known games.

INSIDE
Shared: Dark · Puzzle Platformer · Puzzle

LIMBO
Shared: Platformer · Dark · Puzzle

Little Nightmares
Shared: Dark · Puzzle · Puzzle Platformer

Portal 2
Shared: Platformer · Puzzle · Puzzle Platformer

Seen
Shared: Dark · Puzzle · Platformer

The Pedestrian
Shared: Puzzle · Platformer · Puzzle Platformer

Little Nightmares II
Shared: Dark · Puzzle · Adventure

Creepy Tale
Shared: Puzzle · Platformer · Dark

Braid
Shared: Puzzle · Platformer · 2D Platformer

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

Moonleap
Shared: Platformer · Puzzle · Minimalist

Portal
Shared: Puzzle · 3D Platformer · Puzzle Platformer

Viewfinder
Shared: Puzzle · Abstract · Puzzle Platformer

EDGE
Shared: Puzzle · Platformer · Puzzle Platformer

FEZ
Shared: Platformer · Puzzle · Indie

No Case Should Remain Unsolved
Shared: Puzzle · Visual Novel · Point & Click

Climb The Backrooms
Shared: Platformer · Puzzle · Dark

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

Öoo
Shared: Puzzle · 2D Platformer · Platformer

Neva
Shared: Platformer · Puzzle · Adventure

Sally Face - Episode One
Shared: Dark · Puzzle · Indie

Fran Bow
Shared: Puzzle · Dark · Point & Click

The Room Three
Shared: Puzzle · Point & Click · Dark

Buckshot Roulette
Shared: Dark · Puzzle · Strategy