Games like Blox 3D World
Games like Blox 3D World include Two Point Museum, The Sims™ 4, Timberborn, The Sims™ 3, and Cities: Skylines. We matched them by the tags players give Blox 3D World on Steam (Simulation, Voxel, Life Sim, Casual, and Exploration): closest matches first, and among equally close ones the better-known games.

Two Point Museum
Shared: Simulation · Casual · Building

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

Timberborn
Shared: Voxel · City Builder · Building

The Sims™ 3
Shared: Simulation · Life Sim · Building

Cities: Skylines
Shared: Simulation · Building · City Builder

Stardew Valley
Shared: Life Sim · Simulation · Sandbox

Starsand Island
Shared: Life Sim · Simulation · Casual

Paralives
Shared: Simulation · Life Sim · Building

SPORE™
Shared: Simulation · Exploration · Sandbox

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

Stonehearth
Shared: Simulation · Building · Voxel

Prison Architect
Shared: Simulation · Building · Sandbox

Mon Bazou
Shared: Life Sim · Exploration · Sandbox

My Time at Portia
Shared: Life Sim · Simulation · Casual

Garry's Mod
Shared: Sandbox · Building · Casual

Cities: Skylines II
Shared: Simulation · Building · City Builder

Go-Go Town!
Shared: Simulation · Life Sim · Building

PC Building Simulator
Shared: Simulation · Building · Life Sim

Settlement Survival
Shared: Simulation · Building · City Builder

A Game About Digging A Hole
Shared: Voxel · Exploration · Simulation

Littlewood
Shared: Life Sim · Simulation · City Builder

Disney Dreamlight Valley
Shared: Life Sim · Simulation · Exploration

Townscaper
Shared: Building · Simulation · Casual

Internet Cafe Simulator 2
Shared: Simulation · Exploration · Life Sim