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

Underland
Shared: Dungeon Crawler · Destruction · Lemmings

Noita
Shared: Dungeon Crawler · Pixel Graphics · Physics

Papers, Please
Shared: Simulation · Pixel Graphics · Indie

Besiege
Shared: Destruction · Simulation · Physics

People Playground
Shared: Destruction · Physics · Simulation

ANIMAL WELL
Shared: Exploration · Pixel Graphics · Puzzle Platformer

Webbed
Shared: Pixel Graphics · Exploration · Puzzle Platformer

Teardown
Shared: Destruction · Physics · Indie

BeamNG.drive
Shared: Destruction · Simulation · Physics

Rain World
Shared: Exploration · Pixel Graphics · Indie

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

Ship Graveyard Simulator
Shared: Simulation · Exploration · Destruction

Goat Simulator
Shared: Simulation · Destruction · Physics

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

INMOST
Shared: Pixel Graphics · Exploration · Indie

FEZ
Shared: Exploration · Pixel Graphics · Indie

Wreckfest
Shared: Destruction · Simulation · Physics

Aviassembly
Shared: Exploration · Physics · Destruction

OneShot
Shared: Pixel Graphics · Indie · Exploration

Kerbal Space Program
Shared: Simulation · Physics · Exploration

Forts
Shared: Destruction · Physics · Strategy

Ship Graveyard Simulator 2
Shared: Destruction · Simulation · Exploration

Hardspace: Shipbreaker
Shared: Destruction · Simulation · Physics

Stardew Valley
Shared: Pixel Graphics · Simulation · Indie