Games like My Little Universe
Games like My Little Universe include Starbound, Terraria, No Man's Sky, The Forest, and Core Keeper. We matched them by the tags players give My Little Universe on Steam (Mining, Exploration, Dungeon Crawler, Sandbox, and Crafting): closest matches first, and among equally close ones the better-known games.

Starbound
Shared: Sandbox · Survival · Crafting

Terraria
Shared: Sandbox · Survival · Exploration

No Man's Sky
Shared: Exploration · Space · Survival

The Forest
Shared: Survival · Crafting · Exploration

Core Keeper
Shared: Exploration · Survival · Sandbox

ASTRONEER
Shared: Exploration · Survival · Space

Rust
Shared: Crafting · Survival · Sandbox

Disney Dreamlight Valley
Shared: Exploration · Character Customization · Sandbox

A Game About Digging A Hole
Shared: Mining · Exploration · Sandbox

EVE Online
Shared: Exploration · Space · Sandbox

The Long Dark
Shared: Exploration · Survival · Crafting

SPORE™
Shared: Sandbox · Exploration · Space

ICARUS
Shared: Survival · Exploration · Crafting

Dune: Awakening
Shared: Exploration · Survival · Sandbox

Don't Starve
Shared: Survival · Crafting · Sandbox

Portal Knights
Shared: Sandbox · Crafting · Survival

Valheim
Shared: Survival · Exploration · Crafting

Once Human
Shared: Survival · Exploration · Crafting

Enshrouded
Shared: Survival · Crafting · Exploration

ARK: Survival Ascended
Shared: Survival · Crafting · Sandbox

Slime Rancher
Shared: Exploration · Sandbox · Cute

Conan Exiles Enhanced
Shared: Survival · Crafting · Sandbox

Black Desert
Shared: Exploration · Sandbox · Crafting

Goat Simulator 3
Shared: Exploration · Sandbox · Character Customization