Games like Underland
Games like Underland include Noita, Papers, Please, People Playground, Besiege, and ANIMAL WELL. We matched them by the tags players give Underland on Steam (Dungeon Crawler, Destruction, Lemmings, Exploration, and Pixel Graphics): closest matches first, and among equally close ones the better-known games.

Noita
Shared: Dungeon Crawler · Pixel Graphics · Physics

Papers, Please
Shared: Pixel Graphics · Simulation · Indie

People Playground
Shared: Physics · Destruction · Simulation

Besiege
Shared: Destruction · Simulation · Physics

ANIMAL WELL
Shared: Exploration · Pixel Graphics · Puzzle Platformer

Underland: The Climb
Shared: Dungeon Crawler · Destruction · Lemmings

Webbed
Shared: Pixel Graphics · Exploration · Puzzle Platformer

Teardown
Shared: Destruction · Physics · Indie

BeamNG.drive
Shared: Destruction · Simulation · Physics

Rain World
Shared: Exploration · Pixel Graphics · Atmospheric

FEZ
Shared: Exploration · Pixel Graphics · Indie

Forts
Shared: Destruction · Physics · Strategy

The Binding of Isaac: Rebirth
Shared: Dungeon Crawler · Pixel Graphics · Indie

WorldBox - God Simulator
Shared: Destruction · Pixel Graphics · Simulation

INMOST
Shared: Pixel Graphics · Exploration · Puzzle Platformer

Ship Graveyard Simulator
Shared: Exploration · Simulation · Destruction

Goat Simulator
Shared: Destruction · Simulation · Physics

Aviassembly
Shared: Physics · Exploration · Destruction

OneShot
Shared: Pixel Graphics · Indie · Exploration

Wreckfest
Shared: Destruction · Simulation · Physics

Kerbal Space Program
Shared: Simulation · Physics · Exploration

Supraland
Shared: Exploration · Puzzle Platformer · Physics

Hardspace: Shipbreaker
Shared: Destruction · Physics · Simulation

The Powder Toy
Shared: Pixel Graphics · Destruction · Simulation