Single-player games like Add Astra
Below are 10 single-player Steam games similar to Add Astra, 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 Add Astra page.
Ranked picks
- 1
Galactic Economy
Single-player alternative to Add Astra — playable solo, no multiplayer required. Shares Indie with Add Astra.
Your road to financial freedom leads to the stars. Acquire strategic sectors, manage complex loans, and mitigate systemic risks to grow your passive income. A gritty sci-fi tycoon strategy game where every decision determines your path to galactic domination.
- 2
Cosmic Outpost
Single-player alternative to Add Astra — playable solo, no multiplayer required. Shares Indie with Add Astra.
Cosmic Outpost is a turn-based strategy game where you build an outpost on a new planet. As pioneers, you will construct an outpost while defending against enemies. Gather enough materials to build a spaceship to explore new worlds and expand humanity's frontiers!
- 3
SpaceCorp: 2025-2300AD
Single-player alternative to Add Astra — playable solo, no multiplayer required. Shares Indie with Add Astra.
Lead mankind's exploration into outer space! Build bases on the Moon and Mars, survey the rings of Saturn, and send generational Colony ships to Alpha Centauri, all in one sitting! SpaceCorp: 2025-2300 AD is a fast-playing, single-player, turn-based, sci-fi strategy game.
- 4
BOT.vinnik Chess: Combination Lessons
Single-player alternative to Add Astra — playable solo, no multiplayer required. Shares Indie with Add Astra.
Nowadays everyone is a self-proclaimed chess player! Quite different from the soviet kids back in the old days. Maybe you are not so lazy and really want to improve your chess knowledge. Surprise me!
- 5
Gaia Project
Single-player alternative to Add Astra — playable solo, no multiplayer required. Shares Indie with Add Astra.
Gaia Project is the digital adaptation of the boardgame Gaia Project created by Helge Ostertag and Jens Drögemüller and published by "Feuerland Verlag". It is a 1-4 player strategy game. It plays in the same universe as Terra Mystica and continues the adventure in the far future.
- 6
Planetiles
Single-player alternative to Add Astra — playable solo, no multiplayer required. Shares Indie with Add Astra.
Dive into Planetiles, where strategy and creativity converge. Build and transform barren planets into flourishing worlds. Outwit natural disasters, develop vibrant habitats, and navigate complex challenges. Embrace a boardgame-like depth with thoughtful planning and strategic decision-making.
- 7
ENDLESS™ Space - Definitive Edition
Single-player alternative to Add Astra — playable solo, no multiplayer required.
ENDLESS™ Space is a turn-based 4X strategy game, covering the space colonization age in the ENDLESS™ Universe, where you can control every aspect of your civilization as you strive for galactic domination.
- 8
Nexus 5X
Single-player alternative to Add Astra — playable solo, no multiplayer required. Shares Indie with Add Astra.
eXplore, eXpand, eXploit, eXterminate, EXPRESS. All of the depth, diplomacy, conflict and conquest of a turn-based 4X epic but played in fast-paced 60-minute competitive sessions. Play Solo or Multiplayer for 2-8 players.
- 9
Kaizen: A Factory Story
Single-player alternative to Add Astra — playable solo, no multiplayer required.
Kaizen is an open-ended puzzle automation game from the original Zachtronics team, set in 1980s Japan. Design, build, and optimize production lines to create iconic products, like calculators, camcorders, and arcade machines.
- 10
U.V.S. Nirmana
Single-player alternative to Add Astra — playable solo, no multiplayer required. Shares Indie with Add Astra.
U.V.S. Nirmana is a engineering puzzle game from Coincidence, the creators of Kaizen: A Factory Story and the inventors of the Zach-like. Set off on the Unreturning Void Ship Nirmana as it continues a journey of uncountable eons toward the edge of the universe.