Single-player games like Astrox Imperium
Below are 13 single-player Steam games similar to Astrox Imperium, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Astrox Imperium page.
Ranked picks
- 1
Astrox: Hostile Space Excavation
Single-player alternative to Astrox Imperium — playable solo, no multiplayer required. Shares Indie and Adventure with Astrox Imperium.
Exiled to a deep space mining sector, you are left with a crappy ship, a laser, and a small mining beam. It is up to you to survive by working your way through the galaxy. Mine asteroids, refine and trade the ore, buy upgrades for your ship, hunt pirates... you get it.
- 2
Starpoint Gemini Warlords
Single-player alternative to Astrox Imperium — playable solo, no multiplayer required. Shares Action and Simulation with Astrox Imperium.
Strategy from the front lines! Starpoint Gemini Warlords combines 3rd person capital spaceship combat with 4X strategy and RPG gameplay elements. Build mighty war fleets and send them into battle or lead them into combat yourself. Become the Warlord and conquer the Gemini system!
- 3
Star Valor
Single-player alternative to Astrox Imperium — playable solo, no multiplayer required. Shares Action and Indie with Astrox Imperium.
Choose your own destiny as you explore an open-world procedurally generated galaxy where anything is possible. Become a miner, a trader, a bounty hunter, a pirate, or perhaps a jack of all trades. Start off small and build your way to the top but remember with every action, comes consequences.
- 4
Void Destroyer 2
Single-player alternative to Astrox Imperium — playable solo, no multiplayer required. Shares Action and Indie with Astrox Imperium.
Start with nothing... End with everything! All you have is a basic ship, barely fit for combat, with it you'll start your journey and empire. A open world space sandbox, inspired by and expanding the classics.
- 5
Avorion
Single-player alternative to Astrox Imperium — playable solo, no multiplayer required. Shares Action and Indie with Astrox Imperium.
A procedural co-op space sandbox where players can build their own space ships out of dynamically scalable blocks. Fight epic space battles, explore, mine, trade, wage wars and build your own empire to save your galaxy from being torn apart by an unknown enemy.
- 6
Rebel Galaxy
Single-player alternative to Astrox Imperium — playable solo, no multiplayer required. Shares Action and Indie with Astrox Imperium.
Rebel Galaxy is a swashbuckling space adventure, with action-packed combat, exploration, discovery, trade, and “negotiation” with the outlandish denizens at the edge of the known universe.
- 7
Endless Sky
Single-player alternative to Astrox Imperium — playable solo, no multiplayer required. Shares Action and Indie with Astrox Imperium.
Endless Sky is a 2D space trading and combat game inspired by the classic Escape Velocity series. Work your way up from a relatively wimpy shuttle, cargo ship, or fighter, to a highly upgraded and customized flagship or to a massive fleet of warships or freighters.
- 8
Empyrion - Galactic Survival
Single-player alternative to Astrox Imperium — playable solo, no multiplayer required. Shares Indie and Adventure with Astrox Imperium.
Build and explore in a true space sandbox survival adventure. Construct mighty capital vessels, sprawling planetary settlements, and vast space stations in your galactic journey to discover the mysteries of Empyrion!
- 9
X4: Foundations
Single-player alternative to Astrox Imperium — playable solo, no multiplayer required. Shares Action and Simulation with Astrox Imperium.
Your journey to building a vast space empire begins behind the controls of a single ship. Explore, trade, fight, and build as you rise to command fleets, stations, and entire economies in a living, fully simulated universe that reacts to every decision.
- 10
Terraria
Single-player alternative to Astrox Imperium — playable solo, no multiplayer required. Shares Action and Indie with Astrox Imperium.
Dig, fight, explore, build! Nothing is impossible in this action-packed adventure game. Four Pack also available!
- 11
TerraTech
Single-player alternative to Astrox Imperium — playable solo, no multiplayer required. Shares Action and Indie with Astrox Imperium.
TerraTech is an open-world, sandbox adventure game, where you design and build your own creations through a mix of crafting, combat and discovery. Design vehicles from a huge library of blocks. Scavenge, craft and buy new parts to survive and become the ultimate planetary prospector.
- 12
Elite Dangerous
Single-player alternative to Astrox Imperium — playable solo, no multiplayer required. Shares Action and Adventure with Astrox Imperium.
Take control of your own starship and blaze your trail in an ever-changing galaxy. Master the arts of combat, mining and trade or venture out into the unknown across a 1:1 scale universe.
- 13
No Man's Sky
Single-player alternative to Astrox Imperium — playable solo, no multiplayer required. Shares Action and Adventure with Astrox Imperium.
No Man's Sky is a game about exploration and survival in an infinite procedurally generated universe.