Games like Astro Protocol

Remember how replayable Astro Protocol felt at its best? These games offer a similar pull for your backlog.

Cheaper than Astro Protocol

Hyper Empire

Hyper Empire

Play a 4x game in 40 minutes... or less! We streamlined 4x strategy down to a game that captures the fun in a manageable play time.

78% of 46 Steam reviews are positive$11.99
Starion Tactics

Starion Tactics

After assuming command of one of four human or alien factions vying for galactic dominance, immediately define your game’s scope.

25% of 48 Steam reviews are positive$9.99
Mini Gal4Xy

Mini Gal4Xy

Mini Gal4Xy is a light strategy game set in space.

87% of 31 Steam reviews are positive$3.99
Star Traders: 4X Empires

Star Traders: 4X Empires

Take command of humanity’s last survivors and rebuild an empire in the stars.

61% of 61 Steam reviews are positive$9.99
ENDLESS Space™ - Definitive Edition

ENDLESS Space™ - Definitive Edition

Grow a civilization from a single star system to a galactic power, turn by turn, in a galaxy that never generates the same way twice.

79% of 6,631 Steam reviews are positivePlayers online now: 72$9.99
Star Ruler

Star Ruler

Take command of a vast interstellar empire and safeguard your species from total extinction in a procedurally generated 3D galaxy (with the option…

86% of 261 Steam reviews are positive$7.99
Final Theory

Final Theory

Final Theory is a 4X-lite turn-based strategy game where you command fleets of battleships engaged in a galactic civil war.

79% of 389 Steam reviews are positivePlayers online now: 1$7.49
Sid Meier's Alpha Centauri™ Planetary Pack

Sid Meier's Alpha Centauri™ Planetary Pack

Lead a faction of ideologues across an alien world, out-think six rivals and shape a whole planet's future one turn at a time.

90% of 610 Steam reviews are positivePlayers online now: 51$4.99
Galactic Civilizations® II: Ultimate Edition

Galactic Civilizations® II: Ultimate Edition

Guide a spacefaring civilization through a randomly generated galaxy, designing ships and choosing whether war, culture, diplomacy or technology…

80% of 958 Steam reviews are positivePlayers online now: 33$9.99
After the Empire

After the Empire

Build a galaxy-spanning machine empire!​ Bend galactic geography to your will to seize hundreds of territories with Fleet, Crypto and Glory.

76% of 46 Steam reviews are positive$7.99
Sword of the Stars: Complete Collection

Sword of the Stars: Complete Collection

Build a space empire turn by turn, design your own fleets and fight real-time battles across a galaxy that never plays out the same way twice.

87% of 590 Steam reviews are positivePlayers online now: 24$9.99

Hidden gems like Astro Protocol

Nexus 5X

Nexus 5X

eXplore, eXpand, eXploit, eXterminate, EXPRESS. All of the depth, diplomacy, conflict and conquest of a turn-based 4X epic but played in fast-paced…

90% of 889 Steam reviews are positive$14.99
ENDLESS Legend™ 2

ENDLESS Legend™ 2

Guide one of several distinct factions across a living ocean planet, building armies and economies while the tides reshape your route to victory.

82% of 3,780 Steam reviews are positivePlayers online now: 456$49.99
Sid Meier's Alpha Centauri™ Planetary Pack

Sid Meier's Alpha Centauri™ Planetary Pack

Lead a faction of ideologues across an alien world, out-think six rivals and shape a whole planet's future one turn at a time.

90% of 610 Steam reviews are positivePlayers online now: 51$4.99
Ozymandias: Bronze Age Empire Sim

Ozymandias: Bronze Age Empire Sim

Lead a Bronze Age civilization across hex maps, founding cities and choosing one move per turn, alone or against rivals in multiplayer.

89% of 1,324 Steam reviews are positivePlayers online now: 22$14.99
Terra Invicta

Terra Invicta

Steer one of seven factions through an alien arrival, from covert politics on Earth to fleet battles across the Solar System.

79% of 9,162 Steam reviews are positivePlayers online now: 578$39.99
Sins of a Solar Empire II

Sins of a Solar Empire II

A real-time 4X where tactics and empire-building happen in one mode with no turns.

82% of 7,259 Steam reviews are positivePlayers online now: 848$49.99
Slipways

Slipways

Link planets with warp routes, balance their needs and grow a trade network, one calm turn at a time.

92% of 2,247 Steam reviews are positivePlayers online now: 8$16.99
Dominus Galaxia: KS Edition

Dominus Galaxia: KS Edition

Dominus Galaxia is a 4X space strategy game with a focus on amplifying strategic decisions and minimising non-strategic busywork.

83% of 251 Steam reviews are positivePlayers online now: 6Free
Galactic Civilizations IV

Galactic Civilizations IV

Guide a young spacefaring civilization across a fresh galaxy each run, growing it by war, trade, diplomacy or culture until the stars answer to you.

72% of 2,243 Steam reviews are positivePlayers online now: 275$39.99
Shadow Empire

Shadow Empire

Run a small state on a procedurally generated world, balancing armies, politics and supply as you reconquer a devastated sci-fi planet.

82% of 1,459 Steam reviews are positivePlayers online now: 73$19.99
AI War 2

AI War 2

Build fleets in secret, hack the enemy's systems and hit its core before it wakes up to what you are doing.

87% of 1,131 Steam reviews are positivePlayers online now: 18$19.99
Interstellar Space: Genesis

Interstellar Space: Genesis

Build a turn-based galactic empire your way, from first colony ship to tactical battles between the stars.

83% of 720 Steam reviews are positivePlayers online now: 25$29.99

Newest games like Astro Protocol

ENDLESS Legend™ 2

ENDLESS Legend™ 2

Guide one of several distinct factions across a living ocean planet, building armies and economies while the tides reshape your route to victory.

82% of 3,780 Steam reviews are positivePlayers online now: 456$49.99
Space Imperia 4X

Space Imperia 4X

A board-game 4X that finishes in one to two hours. Explore a new hex galaxy, research techs, build fleets from scouts to Dreadnaughts, and hunt down…

92% of 88 Steam reviews are positivePlayers online now: 9$22.99
Terra Invicta

Terra Invicta

Steer one of seven factions through an alien arrival, from covert politics on Earth to fleet battles across the Solar System.

79% of 9,162 Steam reviews are positivePlayers online now: 578$39.99
Stellar Reach

Stellar Reach

Stellar Reach is a 4X hard sci-fi strategy game where you control a faction vying for dominance across a hostile galactic frontier.

79% of 34 Steam reviews are positive$19.99
Rogue Hex

Rogue Hex

Play your cards right to conquer the world in the Roguelite 4x.

88% of 267 Steam reviews are positivePlayers online now: 8$19.99
DR4X

DR4X

A fast, casual (And also haunted.) 4X game with asymmetric factions and roguelike elements.

88% of 34 Steam reviews are positive$0.99
Hyper Empire

Hyper Empire

Play a 4x game in 40 minutes... or less! We streamlined 4x strategy down to a game that captures the fun in a manageable play time.

78% of 46 Steam reviews are positive$11.99
Emperor of the Fading Suns Enhanced

Emperor of the Fading Suns Enhanced

Command interstellar forces in this epic return of the 4X strategy classic.

95% of 178 Steam reviews are positivePlayers online now: 5$9.99
Annihilate The Spance

Annihilate The Spance

Annihilate The Spance is a single-player RTS where your shipyards build endlessly and your ships fight on their own.

89% of 353 Steam reviews are positivePlayers online now: 9$29.99
Sins of a Solar Empire II

Sins of a Solar Empire II

A real-time 4X where tactics and empire-building happen in one mode with no turns.

82% of 7,259 Steam reviews are positivePlayers online now: 848$49.99
Nexus 5X

Nexus 5X

eXplore, eXpand, eXploit, eXterminate, EXPRESS. All of the depth, diplomacy, conflict and conquest of a turn-based 4X epic but played in fast-paced…

90% of 889 Steam reviews are positive$14.99