Single-player games like Astro Protocol
Below are 8 single-player Steam games similar to Astro Protocol, 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 Astro Protocol page.
Ranked picks
- 1
DeckTerra
Single-player alternative to Astro Protocol — playable solo, no multiplayer required. Shares Strategy with Astro Protocol.
A Medieval 4X Deckbuilder. Lead a kingdom as you build your deck to conquer the map and expand your rule. Develop your technology through the middle ages to improve your army of knights and keep your peasants happy. Develop your trade, religion, science, and military to conquer the continent.
- 2
Dwarf Guild Mania
Single-player alternative to Astro Protocol — playable solo, no multiplayer required. Shares Strategy with Astro Protocol.
Lead a campaign of glory as you mine, trade, spy, & sabotage your way to victory. Your guild of dwarves must vanquish its rivals and conquer the realm in this turn-based economic strategy game. Lead your capitalist dwarves across new lands in search of gems and gold. For the Guild!
- 3
Monarchs at Play
Single-player alternative to Astro Protocol — playable solo, no multiplayer required. Shares Strategy with Astro Protocol.
Turn-based 4X strategy in just one hour. Place buildings, chain adjacency bonuses, optimize resources, and outsmart rival monarchs through trade or war to earn the most Glory - solo or multiplayer.
- 4
Sid Meier's Civilization®: Beyond Earth™
Single-player alternative to Astro Protocol — playable solo, no multiplayer required. Shares Strategy with Astro Protocol.
Sid Meier’s Civilization: Beyond Earth is a new science-fiction-themed entry into the award winning Civilization series. As part of an expedition sent to find a home beyond Earth, lead your people into a new frontier, explore and colonize an alien planet and create a new civilization in space.
- 5
Alliance of the Sacred Suns
Single-player alternative to Astro Protocol — playable solo, no multiplayer required. Shares Strategy with Astro Protocol.
Alliance of the Sacred Suns is a sci-fi grand-strategy RPG that begins with your coronation as the head of an interstellar Empire, and ends with your demise. Manage feuding noble houses and the schemes of would-be usurpers as you try to revive the glory of an Empire on the brink of collapse.
- 6
Galactic Civilizations III
Single-player alternative to Astro Protocol — playable solo, no multiplayer required. Shares Strategy with Astro Protocol.
Build a civilization that will stand the test of time in the largest space-based strategy game ever! Choose from dozens of unique races and make a name for yourself across the galaxy through diplomacy, espionage, technological advances, and more.
- 7
Warhammer 40,000: Gladius - Relics of War
Single-player alternative to Astro Protocol — playable solo, no multiplayer required. Shares Strategy with Astro Protocol.
Warhammer 40,000: Gladius – Relics of War brings you to a world of terror and violence. Four factions will engage in a brutal war for dominance over the planet’s resources. In the first turn-based 4X strategy game set in Warhammer 40,000 you will lead one of four unique factions.
- 8
ZEPHON
Single-player alternative to Astro Protocol — playable solo, no multiplayer required. Shares Strategy with Astro Protocol.
From the developers of Warhammer 40,000: Gladius, ZEPHON is a post-apocalyptic 4X strategy game built on Proxy’s unique tactical combat system. Guide survivors through a turbulent future, navigating unexpected disasters, eldritch horror and cyberpunk monstrosities. What will you do to survive?