Games like Hexa Trains
Games like Hexa Trains include Kerbal Space Program, Hardspace: Shipbreaker, Train Simulator Classic, No Man's Sky, and Transport Fever 2. We matched them by the tags players give Hexa Trains on Steam (Simulation, Trains, Hex Grid, Procedural Generation, and Space): closest matches first, and among equally close ones the better-known games.

Kerbal Space Program
Shared: Simulation · Space

Hardspace: Shipbreaker
Shared: Simulation · Space · Procedural Generation

Train Simulator Classic
Shared: Simulation · Trains

No Man's Sky
Shared: Space · Procedural Generation · Simulation

Transport Fever 2
Shared: Simulation · Trains · Procedural Generation

Mashinky
Shared: Simulation · Trains · Procedural Generation

Plan B: Terraform
Shared: Simulation · Trains · Hex Grid

Derail Valley
Shared: Simulation · Trains · Procedural Generation

Stellaris
Shared: Space · Simulation · Procedural Generation

Transport Fever 3
Shared: Simulation · Trains · Procedural Generation

X4: Foundations
Shared: Simulation · Space

Empyrion - Galactic Survival
Shared: Simulation · Space

Universe Sandbox
Shared: Simulation · Space

FTL: Faster Than Light
Shared: Space · Procedural Generation · Simulation

Space Engineers
Shared: Simulation · Space

Terraformers
Shared: Simulation · Procedural Generation · Space

Elite Dangerous
Shared: Space · Simulation

Mountain
Shared: Simulation · Space · Procedural Generation

Train Sim World® 2
Shared: Simulation · Trains

Sweet Transit
Shared: Simulation · Trains · Procedural Generation

Distant Worlds 2
Shared: Simulation · Space · Procedural Generation

Dyson Sphere Program
Shared: Space · Simulation

Train Sim World® 2020
Shared: Simulation · Trains

Ostranauts
Shared: Simulation · Space · Procedural Generation