Games like Project Astra Dominium
Games like Project Astra Dominium include Dyson Sphere Program, Factorio, Mindustry, Satisfactory, and Captain of Industry. We matched them by the tags players give Project Astra Dominium on Steam (Tower Defense, Indie, Automation, Crafting, and Economy): closest matches first, and among equally close ones the better-known games.

Dyson Sphere Program
Shared: Automation · Base Building · Space

Factorio
Shared: Automation · Base Building · Crafting

Mindustry
Shared: Tower Defense · Automation · Base Building

Satisfactory
Shared: Automation · Base Building · Crafting

Captain of Industry
Shared: Automation · Base Building · Economy

shapez
Shared: Automation · Base Building · Crafting

Automation Empire
Shared: Automation · Base Building · Economy

The Last Caretaker
Shared: Crafting · Automation · Base Building

Stationeers
Shared: Automation · Base Building · Crafting

Oxygen Not Included
Shared: Base Building · Singleplayer · Indie

The Riftbreaker
Shared: Tower Defense · Base Building · Crafting

Creeper World 3: Arc Eternal
Shared: Tower Defense · Indie · Strategy

Factory Town
Shared: Automation · Base Building · Crafting

Astro Colony
Shared: Automation · Base Building · Space

Little Big Workshop
Shared: Automation · Economy · Strategy

This War of Mine
Shared: Crafting · Base Building · Singleplayer

shapez 2 - Factory
Shared: Automation · Crafting · Strategy

Soulmask
Shared: Crafting · Base Building · PvE

Production Line : Car factory simulation
Shared: Automation · Economy · Indie

Breathedge
Shared: Indie · Space · Base Building

Outworld Station
Shared: Automation · Base Building · Space

Autonauts
Shared: Automation · Indie · Base Building

Defense Grid: The Awakening
Shared: Tower Defense · Indie · Strategy

The Planet Crafter
Shared: Base Building · Crafting · Space