Single-player games like Star Vortex
Below are 11 single-player Steam games similar to Star Vortex, 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 Star Vortex page.
Ranked picks
- 1

Reality Break
Single-player alternative to Star Vortex — playable solo, no multiplayer required. Shares Action and Indie with Star Vortex.
Rewrite the universe! Break reality to change your fate, and use your powers to stop sinister forces from altering existence itself. Discover the origin of your new abilities in a fast-paced ARPG Loot Collection Roguelite where you will bend, break, and change the laws of the universe!
- 2

Starcom: Unknown Space
Single-player alternative to Star Vortex — playable solo, no multiplayer required. Shares Action and Indie with Star Vortex.
Starcom: Unknown Space is an action RPG of space exploration and adventure. Build your own starship while discovering an epic story in a universe of strange mysteries, alien factions and uncharted worlds.
- 3

Astroloot
Single-player alternative to Star Vortex — playable solo, no multiplayer required. Shares Action and Indie with Star Vortex.
Loot, level up, and obliterate everything in your path. Astroloot is a sci-fi bullet heaven with deep ARPG systems, featuring a massive skill tree, deterministic crafting, and near-endless build possibilities.
- 4

Star Valor
Single-player alternative to Star Vortex — playable solo, no multiplayer required. Shares Action and Indie with Star Vortex.
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.
- 5

Drox Operative
Single-player alternative to Star Vortex — playable solo, no multiplayer required. Shares Action and Indie with Star Vortex.
Drox Operative is a starship action RPG with warring alien races, fierce space battles, a dynamic, evolving galaxy, and co-op multiplayer for Windows and Mac.Eons ago the Drox ruled the galaxy through their mighty Operatives. These elite starship captains were trained to accomplish the impossible at whatever cost necessary.
- 6

eXoSpace Combat Engineer
Single-player alternative to Star Vortex — playable solo, no multiplayer required. Shares Action and Indie with Star Vortex.
Snap, rotate and launch your own warship in minutes, then pilot it into bullet-hell boss fights to hunt the galaxy's supervillains. Master intuitive engineering, evolve from drone to dreadnought, and use the fully gridless designer to build anything you can imagine!
- 7

Psycho Starship Rampage
Single-player alternative to Star Vortex — playable solo, no multiplayer required. Shares Action and Indie with Star Vortex.
You play the psychotic A.I. of a warship lost in space which tries to come back to Earth. Build your spaceship from scratch. Load it with weapons. And use your creation to destroy waves of innocent aliens throughout numerous levels. Loot their carcasses, extend your ship and jump to the next sector for more action!
- 8

Nienix: Cosmic Warfare
Single-player alternative to Star Vortex — playable solo, no multiplayer required. Shares Action and Indie with Star Vortex.
Search for the legendary lost artifact Nienix through galaxies in conflict! An open world space action RPG adventure that can be played both alone and together!
- 9

Reassembly
Single-player alternative to Star Vortex — playable solo, no multiplayer required. Shares Action and Indie with Star Vortex.
A spaceship building and universe-exploration game. Collect resources, expand and grow your fleet, and conquer your personal galaxy. Stellar ambience by Peaks.
- 10

Avorion
Single-player alternative to Star Vortex — playable solo, no multiplayer required. Shares Action and Indie with Star Vortex.
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.
- 11

Diablo® IV
Single-player alternative to Star Vortex — playable solo, no multiplayer required. Shares Action and RPG with Star Vortex.
Join the fight for Sanctuary in Diablo® IV, the ultimate action RPG adventure. Experience the critically acclaimed campaign and new seasonal content.