Games like Voxelnova
Games like Voxelnova include BeamNG.drive, Totally Accurate Battle Simulator, Mount & Blade II: Bannerlord, Teardown, and Storm Chasers. We matched them by the tags players give Voxelnova on Steam (Simulation, Physics, Strategy, First-Person, and Open World): closest matches first, and among equally close ones the better-known games.

BeamNG.drive
Shared: Simulation · Physics · Open World

Totally Accurate Battle Simulator
Shared: Simulation · Strategy · Physics

Mount & Blade II: Bannerlord
Shared: Strategy · Open World · Simulation

Teardown
Shared: Physics · First-Person · Indie

Storm Chasers
Shared: Simulation · Early Access · Indie

Kerbal Space Program
Shared: Simulation · Physics · Indie

Hardspace: Shipbreaker
Shared: Simulation · Physics · Singleplayer

Goat Simulator
Shared: Simulation · Physics · Open World

My Summer Car
Shared: Simulation · Open World · First-Person

Thief Simulator
Shared: Simulation · First-Person · Singleplayer

Gold Mining Simulator
Shared: Simulation · Open World · Singleplayer

Schedule I
Shared: Simulation · Open World · First-Person

Contraband Police
Shared: Simulation · Open World · First-Person

Garry's Mod
Shared: Physics · First-Person · Simulation

EmergeNYC
Shared: Simulation · Early Access · Open World

Plague Inc: Evolved
Shared: Simulation · Strategy · Indie

City Car Driving
Shared: Simulation · Open World · First-Person

Total Tank Simulator
Shared: Simulation · Strategy · Indie

Drug Dealer Simulator
Shared: Simulation · Open World · Indie

The Scroll of Taiwu : Beyond The Dome
Shared: Strategy · Open World · Simulation

X-Plane 11
Shared: Simulation · Open World · Physics

The Long Dark
Shared: Open World · First-Person · Simulation

Space Engineers
Shared: Simulation · Physics · Open World

Feed and Grow: Fish
Shared: Simulation · Early Access · Open World