Galaxy Defenders (Classic TD)
A classic tower defense game set in space! Build and upgrade towers, defend your portal from waves of alien invaders, and outsmart evolving threats…
$0.99
Games like 银河战争一(Galactic Wars One）
Chasing that tense feeling you got from 银河战争一(Galactic Wars One）? These games offer a similar pull for your backlog.
Galaxy Defense War
'Galaxy Defense War' is a roguelike tower defense game where you need to select suitable galactic principles from randomly dropped heroes and equipment to form a combat-ready team to resist alien invaders.
97% of 112 Steam reviews are positive$7.72飞跃星球（Eggy Space）
A light tower defense game with unique planet exploration. Defend against aliens, collect resources, and build a new home. Exquisite graphics and challenges await!
100% of 1 Steam reviews are positive$1.99Solar Defense
Solar Defense is a Military Sci-Fi inspired Tower Defense game focused heavily on strategy and decision making. Defend key locations and repel the Pilakarr forces back to their home world to end their attack and bring an end to this war.
Tense
100% of 1 Steam reviews are positive$4.99Zero Conflict TD
Prepare for an out-of-this-world gaming experience in "Zero Conflict TD," the ultimate tower defense game that pits you against a relentless alien invasion! The fate of Earth hangs in the balance, and it's up to you to lead the charge and protect our planet from these extraterrestrial aggressors.
0% of 1 Steam reviews are positive$9.99Solar War
A turn-based grand strategy game in space, set in the near future: Defend Earth against an alien invasion from the edge of the Solar System and expand your campaign to push them back to their base.
Tense
85% of 27 Steam reviews are positive$4.99ShellMobile: Titan Rampart
On the cosmic frontier, humanity has fought alien species for a century. As traditional defenses fall to new-gen alien mechs, tech giant ShellMobile—human-centered at its core—kindles new hope via breakthroughs in extraterrestrial titanium ore research.
Tense
97% of 181 Steam reviews are positive$5.99DEFENDER OF EARTH VS THE ALIEN ARMADA
Defender of Earth vs The Alien Armada is an exciting space themed tower defense game! You play as a general designated as the Defender of Earth, and you will utilize space stations and battle platforms to deploy towers to defend different quadrants of space against 3 alien races.
Tense
50% of 2 Steam reviews are positive$1.99Unearthing Invasions
A 3d tower defense game set in space. Protect the last resource outposts from the ongoing Alien attacks! Can you hold out in these ever increasing difficult waves of enemies and protect the last of your resources and Energy?
Tense
100% of 4 Steam reviews are positive$9.99Galaxy Defenders (Classic TD)
A classic tower defense game set in space! Build and upgrade towers, defend your portal from waves of alien invaders, and outsmart evolving threats across handcrafted and procedural maps.
$0.99Galactic Missile Defense
Galactic Missile Defense is a shooter and tower defense game, where you must protect Earth from the invading Martians that declared war on our planet just because a space rover accidentally ruined their picnic!
Tense
59% of 27 Steam reviews are positive$1.99Invaders
This game is a 3d Tower Defense created by a highschooler. It was developed by Unity and was accompanied by a lot of youtube tutorials.
Tense
76% of 17 Steam reviews are positiveFreeTower Defense: Infinite War
In the far future, people build a base on a strange planet they don't know about to protect their limited resources. Protect your base from the incessant invasion of extraterrestrial beings!
Tense
46% of 37 Steam reviews are positivePlayers online now: 2Free
Cheaper than 银河战争一(Galactic Wars One）
Sunset Planet
Sunset Planet is tower defence game. Your beautiful planet has been invaded by alien invaders.
88% of 8 Steam reviews are positive$0.99
Ad Astra: Sci-Fi Tower Defense
Lose yourself in an indie solo-dev. treasure that harkens back to arcade classics!
50% of 6 Steam reviews are positive$0.99
Get Off My Space!
Get Off My Space! is a tower defense game where you rely on skillful tower placement and resource management to beat upcoming dangers of the galaxy.
0% of 2 Steam reviews are positive$0.99
Homeworld Defense
Homeword defense is a strategic game in which you will protect your planets from the waves of asteroids, find out why they appear and save your…
30% of 10 Steam reviews are positive$0.99
Anomaly: Warzone Earth
Lead an armored convoy through alien-held cities, planning routes and using the Commander's abilities to keep your squad alive.
84% of 1,012 Steam reviews are positivePlayers online now: 2$1.59
Anomaly Defenders
Anomaly Defenders is the closing installment of the Anomaly series.
76% of 413 Steam reviews are positive$0.99
Alien Land
This is a special simulation tower defense game, where you need to command each citizen to build a base.
100% of 3 Steam reviews are positive$0.99
Robowars
Robowars is back on Steam! Fight off troops of droids for freedom and honor in our classical tower defense game.
32% of 22 Steam reviews are positive$0.79
Replicators Defence
Small game in Tower Defence genre with elements of shooter. Kill Replicators all by yourself or make perfect defence with different turrets.
67% of 3 Steam reviews are positive$0.99
ARC Alien Raid Combat
A game based on the classic Tower Defense style, assemble your best combination to overcome obstacles, can you do it?
76% of 21 Steam reviews are positive$0.99
Orbital Tower Defence
Build towers on rotating orbital rings to defend your planet.
100% of 4 Steam reviews are positive$0.99
Hidden gems like 银河战争一(Galactic Wars One）
ShellMobile: Titan Rampart
On the cosmic frontier, humanity has fought alien species for a century.
97% of 181 Steam reviews are positive$5.99
Galaxy Defense War
'Galaxy Defense War' is a roguelike tower defense game where you need to select suitable galactic principles from randomly dropped heroes and…
97% of 112 Steam reviews are positive$7.72
Space Cycle
Space resources are the battleground for warring factions. As a Space Defense Officer, protect your faction's assets in a vast, hostile universe.
93% of 179 Steam reviews are positive$1.99
Desperate Place
Desperate Place is a strategic tower defense game where you play as a crew member who wakes up early on a damaged colonization starship.
66% of 253 Steam reviews are positive$10.99
Unstoppable Gorg
Defend the solar system from fearsome aliens by sending satellites into orbit in revolutionary tower defense action!
80% of 214 Steam reviews are positive$9.99
Forbidden Planet
"Forbidden Planet" is a Space Strategy and Tower Defence like Game.
51% of 139 Steam reviews are positive$4.99
飞跃星球（Eggy Space）
A light tower defense game with unique planet exploration. Defend against aliens, collect resources, and build a new home.
100% of 1 Steam reviews are positive$1.99
Solar Defense
Solar Defense is a Military Sci-Fi inspired Tower Defense game focused heavily on strategy and decision making.
100% of 1 Steam reviews are positive$4.99
Zero Conflict TD
Prepare for an out-of-this-world gaming experience in "Zero Conflict TD," the ultimate tower defense game that pits you against a relentless alien…
0% of 1 Steam reviews are positive$9.99
DEFENDER OF EARTH VS THE ALIEN ARMADA
Defender of Earth vs The Alien Armada is an exciting space themed tower defense game!
50% of 2 Steam reviews are positive$1.99
Solar War
A turn-based grand strategy game in space, set in the near future: Defend Earth against an alien invasion from the edge of the Solar System and…
85% of 27 Steam reviews are positive$4.99
Galaxy Defenders (Classic TD)
A classic tower defense game set in space! Build and upgrade towers, defend your portal from waves of alien invaders, and outsmart evolving threats…
$0.99
Newest games like 银河战争一(Galactic Wars One）
Iron grid
Aliens invade Earth to harvest its resources, and you are humanity’s last line of defense.
100% of 3 Steam reviews are positive$6.99
Cosmic Crusher
Incremental game about protecting solar system. Destroy asteroids with a huge arsenal of weapons, upgrade your skills through a massive skill tree…
100% of 5 Steam reviews are positive$3.74
To Save A Planet
Fight across five solar systems in a story-driven mix of tower defense and space combat, where every planet you save brings you closer to the truth…
100% of 2 Steam reviews are positive$5.68
Illegal Alien Tower Defense
Can you save civilization from the brink of collapse, and restore Earth to a High-Trust society?
100% of 3 Steam reviews are positive$1.99
Stellarcraft
Stellarcraft is a sci-fi tower defense adventure: explore alien planets, gather resources, build defenses, and fend off waves of enemies, solo or in…
88% of 76 Steam reviews are positivePlayers online now: 1$9.99
ShellMobile: Titan Rampart
On the cosmic frontier, humanity has fought alien species for a century.
97% of 181 Steam reviews are positive$5.99
Galaxy Defense War
'Galaxy Defense War' is a roguelike tower defense game where you need to select suitable galactic principles from randomly dropped heroes and…
97% of 112 Steam reviews are positive$7.72
WarOS
Step into the world of galactic combat in "WarOS", a Chinese sci-fi game!
68% of 31 Steam reviews are positive$19.99
Desperate Place
Desperate Place is a strategic tower defense game where you play as a crew member who wakes up early on a damaged colonization starship.
66% of 253 Steam reviews are positive$10.99
Last Stand: Defense
"Last Stand:Defense" is a tower defense-themed Rogue-like game.
81% of 116 Steam reviews are positive$5.99
Space Cycle
Space resources are the battleground for warring factions. As a Space Defense Officer, protect your faction's assets in a vast, hostile universe.
93% of 179 Steam reviews are positive$1.99
Rogue Station Defense
A rogue-like sci-fi Tower Defense strategy game with infinite replayability!
100% of 5 Steam reviews are positive$7.99