Games like Waste It
Games like Waste It include Kenshi, Universe Sandbox, Space Engineers, PC Building Simulator, and Stormworks: Build and Rescue. We matched them by the tags players give Waste It on Steam (Sandbox, Life Sim, God Game, Immersive Sim, and Survival): closest matches first, and among equally close ones the better-known games.

Kenshi
Shared: Sandbox · Survival · Open World

Universe Sandbox
Shared: Sandbox · God Game · Physics

Space Engineers
Shared: Sandbox · Survival · Open World

PC Building Simulator
Shared: Immersive Sim · Sandbox · Life Sim

Stormworks: Build and Rescue
Shared: Sandbox · Immersive Sim · Open World

Project Zomboid
Shared: Survival · Sandbox · Open World

Scrap Mechanic
Shared: Sandbox · Survival · Open World

WorldBox - God Simulator
Shared: Sandbox · God Game · Life Sim

BeamNG.drive
Shared: Sandbox · Physics · Open World

Cash Cleaner Simulator
Shared: Sandbox · Immersive Sim · Life Sim

Don't Starve Together
Shared: Survival · Sandbox · Open World

My Winter Car
Shared: Life Sim · Survival · Immersive Sim

The Long Dark
Shared: Survival · Open World · Sandbox

SPORE™
Shared: Sandbox · God Game · Open World

The Coin Game
Shared: Life Sim · Open World · Survival

inZOI
Shared: Life Sim · Sandbox · Realistic

Stardew Valley
Shared: Life Sim · Sandbox · Open World

Totally Accurate Battle Simulator
Shared: Sandbox · Physics · Simulation

Paralives
Shared: Life Sim · Sandbox · Open World

The Sims™ 4
Shared: Life Sim · Sandbox · Simulation

Terraria
Shared: Sandbox · Survival · Open World

Rust
Shared: Survival · Sandbox · Open World

The Forest
Shared: Survival · Open World · Sandbox

ANEURISM IV
Shared: Immersive Sim · Life Sim · Sandbox