Sci-fi Strategy games to play together

202 Sci-fi Strategy games your group can play together online, including Star Realms, Offworld Trading Company, and Istrolid.

All games: 24

Star Realms

Star Realms is a hugely popular space combat deckbuilding game. Download and play today (note: base set is required to play online) to find out why Star Realms is the winner of SXSW 2014 Board Game of the Year, 7 Golden Geek Awards from BoardGameGeek, and 2 Dice Tower awards!

85% positive of 2,256 reviewsPlaying now: 68Free

Offworld Trading Company

Mars has been colonized, and Earth's corporate titans fight to dominate this new market. Competition is fierce in this fast-paced economic RTS from Civilization IV Lead Designer, Soren Johnson.

76% positive of 3,604 reviewsPlaying now: 33

Istrolid

In Istrolid you design your own unique spaceships from a large number of parts to fit your strategy and play style. With no set units or factions you are free to create a fleet where each ship has its own balanced strengths and weaknesses, from basic fighters and bombers to hulking battleships and speedy destroyers.

86% positive of 2,695 reviewsPlaying now: 4Free

Operation: New Earth

Operation: New Earth is an intense sci-fi multiplayer strategy game in which you must command an advanced military facility to defend Earth from a hostile alien invasion. Create an alliance, gather resources, and unlock advanced technology to level up your stronghold!

60% positive of 848 reviewsPlaying now: 237Free

Planetary Annihilation: TITANS

Wage war across entire solar systems with massive armies at your command. Annihilate enemy forces with world-shattering TITAN-class units, and demolish planets with massive super weapons!

84% positive of 11,426 reviewsPlaying now: 224$29.99

Battlefleet Gothic: Armada (Classic)

Battlefleet Gothic: Armada is the RTS videogame adaptation of Games Workshop’s classic tabletop game, pitting the Chaos, Imperium, Eldar, and Orks against each other in visceral space-battles.

67% positive of 5,146 reviewsPlaying now: 40$14.99

FortressCraft Evolved!

FortressCraft Evolved is a unique blend of Voxel Landscapes, Tower Defense, Crafting, Logistics, Exploration, Combat and Assembly lines. Players begin by crash-landing on a strange alien world, left with only a small handful of starting machines.

71% positive of 2,653 reviewsPlaying now: 17$12.99

Galactic Civilizations III

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.

77% positive of 8,340 reviewsPlaying now: 121

Satellite Reign

Satellite Reign is a real-time, class-based strategy game, set in an open-world cyberpunk city. You command a group of 4 agents through rain-soaked, neon-lit streets, where the law is the will of mega-corporations.

74% positive of 2,627 reviewsPlaying now: 6$29.99

Dungeon of the ENDLESS Turns Every Door into a Team Decision

Join up to three friends online as your crew explores a shifting alien facility, powers rooms, builds defenses, and carries a fragile crystal to the next lift. The shared escape is tense, tactical, and shaped by a four-hero limit.

86% positive of 9,428 reviewsPlaying now: 48$11.99

ENDLESS Legend™

ENDLESS Legend™ is a 4X turn-based fantasy strategy game by the creators of ENDLESS Space™ and Dungeon of the ENDLESS™. Control every aspect of your civilization as you struggle to save your homeworld Auriga. Create your own Legend!

83% positive of 14,431 reviewsPlaying now: 114$29.99

DG2: Defense Grid 2 Makes Tower Defense a Shared Puzzle

Team up with one friend to defend power cores in DG2: Defense Grid 2. Choose fully cooperative Doubles or the more competitive Coordinated Defense, online or on one computer.

85% positive of 2,711 reviewsPlaying now: 52$9.99

Creeper World 3: Arc Eternal

Creeper World 3 is what happens when cellular automata takes over a strategy simulation. Instead of discrete units that attack your base, a fluid-like substance spreads over the terraformable terrain. Your base, your weapons, your strategy... you must adapt them all.

96% positive of 4,110 reviewsPlaying now: 181$14.99

Original War: Shared-Control RTS Battles With Friends

Join an online or LAN team match in Original War, where named specialists, base building, and map-specific rules turn a retro RTS into a hands-on group effort.

94% positive of 1,820 reviewsPlaying now: 44$9.99

The Red Solstice

2280 A.D. The last few survivors of a ruined Earth seek a new home: Mars, a planet whose inhabitants didn't take too kindly to outsiders. The Red Solstice is a tense, tactical, squad-based action game. Fight to survive with up to 8 players in co-op, or lead your own squad in single-player mode.

71% positive of 884 reviewsPlaying now: 1$9.99

Infinity Wars: Animated Trading Card Game

Outplay your opponent with simultaneous turns and commander-driven deck-building in a fully free-to-play PvP experience. Build your deck from 1000+ cards across 8 unique factions, and face opponents on a truly level playing field. In Infinity Wars, skill is the only factor that determines victory!

77% positive of 3,470 reviewsPlaying now: 4Free

Build a shared galaxy in StarMade

Build ships, stations, and factions with friends in StarMade’s online voxel sandbox. Create your own goals across a generated universe, with server-based co-op and PvP.

66% positive of 2,200 reviewsPlaying now: 7$14.99

Sanctum 2: Build a Defense, Then Join the Fight

Sanctum 2 combines tower-defense building and first-person shooting in an online campaign for up to four players. You and your friends protect oxygen-producing Cores through waves, character loadouts, and optional survival runs.

91% positive of 7,460 reviewsPlaying now: 16$14.99

Gunpoint

Gunpoint is a stealth puzzle game that lets you rewire its levels to trick people. You play a freelance spy who takes jobs from his clients to break into high security buildings and steal sensitive data.

97% positive of 10,279 reviewsPlaying now: 4$9.99

Earth 2150 Trilogy

Your heroes and your armies will need strong leadership to take them on a spellbinding odyssey that has everything a gamer’s heart could wish for breathtaking worlds in space, battles against cunning enemies and even downright treason from your own government faction - are you up to it?

76% positive of 456 reviewsPlaying now: 8$4.99

Natural Selection 2

A fast paced multiplayer shooter that pits aliens against humans in a strategic and action-packed struggle for survival!

85% positive of 8,647 reviewsPlaying now: 142$4.99

Pandora: First Contact

Pandora: First Contact is a science fiction 4X turn-based strategy game on a planetary scale. Our Earth has been exhausted and colonial attempts on other planetary bodies have been in vain. Finally, after decades of exploration, an interstellar probe has brought promise of a new world.

61% positive of 539 reviewsPlaying now: 2$29.99