Games like LRUD
Games like LRUD include Zup! S, Portal, LIMBO, Zup!, and Mini Metro. We matched them by the tags players give LRUD on Steam (Strategy, Puzzle, 3D Platformer, Puzzle Platformer, and 2D): closest matches first, and among equally close ones the better-known games.

Zup! S
Shared: Puzzle · 2D · Indie

Portal
Shared: Puzzle · Puzzle Platformer · 3D Platformer

LIMBO
Shared: Puzzle · Puzzle Platformer · Indie

Zup!
Shared: Puzzle · 2D · Indie

Mini Metro
Shared: Strategy · Puzzle · Minimalist

Hexcells
Shared: Puzzle · Strategy · Logic

The Bridge
Shared: Puzzle Platformer · Puzzle · 2D

Baba Is You
Shared: Puzzle · Indie · Logic

Zup! 3
Shared: Puzzle · 2D · Indie

Patrick's Parabox
Shared: Puzzle · Minimalist · Logic

Portal 2
Shared: Puzzle · Puzzle Platformer · Singleplayer

The Ball
Shared: 3D Platformer · Puzzle · Puzzle Platformer

Hexcells Infinite
Shared: Puzzle · Strategy · Logic

Zup! F
Shared: Puzzle · 2D · Indie

Zup! 2
Shared: Puzzle · 2D · Indie

Zup! X
Shared: Puzzle · 2D · Indie

Hexcells Plus
Shared: Puzzle · Strategy · Indie

Zup! 7
Shared: Puzzle · 2D · Indie

Tametsi
Shared: Puzzle · Strategy · 2D

Zup! Z
Shared: Puzzle · 2D · Indie

I hate this game
Shared: Puzzle · 2D · Indie

Zup! 8
Shared: Puzzle · 2D · Indie

Zup! 5
Shared: Puzzle · 2D · Indie

Bridge Constructor Portal
Shared: Puzzle · Strategy · 2D