Shuttle Siege
A sci-fi Tower Defense game where your space shuttle is invaded and you have to build mazes of defensive towers to stop the enemies.
75% of 4 Steam reviews are positive$4.99
Games like Galactic Siege
Still thinking about Galactic Siege and its replayable and fast-paced tone? Start with these games when you are ready.
Siege of Centauri
Defend against thousands of enemies in this explosive tower defense game. Deploy upgradable towers and unleash powerful orbital abilities as you try to protect Earth's first colony world from destruction.
Replayable, Fast-paced, Colorful
64% of 352 Steam reviews are positive$14.99Shuttle Siege
A sci-fi Tower Defense game where your space shuttle is invaded and you have to build mazes of defensive towers to stop the enemies.
Replayable
75% of 4 Steam reviews are positive$4.99Tower 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!
Replayable, Colorful
46% of 37 Steam reviews are positivePlayers online now: 2FreeTurret Sector
Turret Sector is an action packed 3D tower defence game and top down shooter.
Replayable, Fast-paced
40% of 5 Steam reviews are positive$5.99Colony Siege
Colony Siege combines the best of RTS and tower defense, including base building, mazing, and unit physics. Defend Earth's remaining colonies using an arsenal of deadly weapons to torch, slice, throw, and impale swarms of alien invaders.
Replayable, Fast-paced
91% of 199 Steam reviews are positive$19.99Revenge of the Titans
The ultimate mash-up of Real-time Strategy and Tower Defense!
Replayable, Fast-paced, Colorful
81% of 665 Steam reviews are positivePlayers online now: 3$14.99Sentinel 4: Dark Star
Want a tactical and strategic tower defense challenge that's packed with options and upgrades? Take command of the dropship Sentinel and do battle across a vibrant sci-fi world.
Replayable
79% of 43 Steam reviews are positive$6.99Galaxy 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.
Replayable, Colorful
$0.99Defense Task Force - Sci Fi Tower Defense
Defense Task Force Featuring Large Scale Procedurally Generated Tower Defense Battles with FPS Quality Visuals and Infinite Waves. 10 tower types, with different attacks , 3 levels plus boosts. 25 Enemy alien species: Regulars, Swarmers, Racers, Cloakers, Healers, Boss Units and Spawners.
Replayable
54% of 35 Steam reviews are positive$2.99Siegebreaker
Conquer the realm in this strategic tower defense game. Build unique towers, unlock powerful upgrades, and master new tactics to overpower your enemies and vanquish the fallen gods.
Replayable, Colorful
86% of 72 Steam reviews are positive$11.99Planet TD
6 different types of towers! 4 planets with different characteristics! 25 different enemies. Drones, Tanks, Biorobotic enemies and many different ground and air vehicles! Snowy and Glacial maps, Desert and Arid lands! Prepare to defend the solar system against invaders!
Replayable, Colorful
73% of 123 Steam reviews are positive$2.99Slime Pandemic TD
Defend the galaxy against a slimey pandemic in this classic Tower Defence game. Build towers to defend these planets and strategize against the infection.
Replayable, Colorful
100% of 18 Steam reviews are positive$3.99
Cheaper than Galactic Siege
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
Defense Task Force - Sci Fi Tower Defense
Defense Task Force Featuring Large Scale Procedurally Generated Tower Defense Battles with FPS Quality Visuals and Infinite Waves. 10 tower types…
54% of 35 Steam reviews are positive$2.99
Planet TD
6 different types of towers! 4 planets with different characteristics! 25 different enemies.
73% of 123 Steam reviews are positive$2.99
Slime Pandemic TD
Defend the galaxy against a slimey pandemic in this classic Tower Defence game.
100% of 18 Steam reviews are positive$3.99
2112TD: Tower Defense Survival
Get ready for the ULTIMATE tower defense onslaught. Build, deploy, research and upgrade your defenses in this epic, old school RTS inspired sci-fi…
87% of 434 Steam reviews are positivePlayers online now: 2$4.79
Space Panic Defense
A futuristic tower defense game with action and strategy!
48% of 25 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
Defense high
"Defend your land from invading creatures in Defense High! Place diverse towers strategically, mine enemy paths, collect coins, and upgrade towers…
83% of 112 Steam reviews are positivePlayers online now: 1$4.99
Galactic 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…
59% of 27 Steam reviews are positive$1.99
Idle Geometry Defense
Defend against endless waves of deadly red cubes in this futuristic idle tower defense game.
80% of 10 Steam reviews are positive$4.99
Ancient Planet Tower Defense
Ancient Planet is classic tower defense game. The stronghold of an ancient civilization has been invaded by hordes of alien raiders.
84% of 878 Steam reviews are positivePlayers online now: 8$4.99
Hidden gems like Galactic Siege
No Creeps Were Harmed TD
Employ lethal turrets, traps, and gadgets to defend against an onslaught of evolving creeps! Step into a twisted, hyper 3D, mind bending realm.
89% of 473 Steam reviews are positive$19.99
Oil and Sand
An exciting tower defense game where you have to defend your island from the invasion of enemy forces.
93% of 116 Steam reviews are positiveFree
Tower Dominion
Shape the battlefield into kill zones, hold the line against waves of aliens, and rebuild your defenses every run.
85% of 5,278 Steam reviews are positivePlayers online now: 324$17.49
Broken Universe - Tower Defense
Get ready to rethink all your defense strategies! Build barricades to stop monsters, or lure them into a maze and attack.
90% of 289 Steam reviews are positive$9.99
2112TD: Tower Defense Survival
Get ready for the ULTIMATE tower defense onslaught. Build, deploy, research and upgrade your defenses in this epic, old school RTS inspired sci-fi…
87% of 434 Steam reviews are positivePlayers online now: 2$4.79
Colony Siege
Colony Siege combines the best of RTS and tower defense, including base building, mazing, and unit physics.
91% of 199 Steam reviews are positive$19.99
Infinitode 2 - Infinite Tower Defense
Place towers, dig mines and tune your defenses against endless waves, one upgrade at a time.
91% of 4,283 Steam reviews are positivePlayers online now: 108Free
Planet TD
6 different types of towers! 4 planets with different characteristics! 25 different enemies.
73% of 123 Steam reviews are positive$2.99
Defense high
"Defend your land from invading creatures in Defense High! Place diverse towers strategically, mine enemy paths, collect coins, and upgrade towers…
83% of 112 Steam reviews are positivePlayers online now: 1$4.99
This Isn't Just Tower Defense
Defend your base with placeable towers that can be upgraded endlessly.
59% of 126 Steam reviews are positive$6.99
Ancient Planet Tower Defense
Ancient Planet is classic tower defense game. The stronghold of an ancient civilization has been invaded by hordes of alien raiders.
84% of 878 Steam reviews are positivePlayers online now: 8$4.99
Alien Robot Monsters
Epic sci-fi tower defense action with 16-bit era look and feel, pitching your colonists against an almost endless horde of hostile alien robots who…
83% of 120 Steam reviews are positive$5.99
Newest games like Galactic Siege
Endless Void: Idle Tower Defence
Shoot. Upgrade. Die. Repeat. Defend against endless swarms in this minimalist idle tower defense.
83% of 6 Steam reviews are positivePlayers online now: 21$4.49
Survivor Challenge TD
Survivor Challenge TD - is a Tower Defense game where you manage a single tower and add upgrades to it.
73% of 45 Steam reviews are positive$4.99
Orbital Tower Defence
Build towers on rotating orbital rings to defend your planet.
100% of 4 Steam reviews are positive$0.99
Rise of the Cones: Planetary Defense
Rise of the Cones is a tower defense game where a relentless army of cones is marching toward your base. They will not stop.
83% of 46 Steam reviews are positive$9.99
Mech Fortress
Mech Fortress is a sci-fi tower defense game where each turret has unique mechanics.
85% of 240 Steam reviews are positive$7.99
Idle Geometry Defense
Defend against endless waves of deadly red cubes in this futuristic idle tower defense game.
80% of 10 Steam reviews are positive$4.99
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
Tower Dominion
Shape the battlefield into kill zones, hold the line against waves of aliens, and rebuild your defenses every run.
85% of 5,278 Steam reviews are positivePlayers online now: 324$17.49
Small People Defense
Use projectile-based towers, unique tower interactions, and overpowered weapons to strategically conquer the endless waves in this 3rd-person tower…
83% of 6 Steam reviews are positive$4.99
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
Towerful Defense: A Rogue TD
A roguelike tower defense where you control a single tower to fight against hordes of aliens coming from all directions.
69% of 208 Steam reviews are positive$9.99
No Creeps Were Harmed TD
Employ lethal turrets, traps, and gadgets to defend against an onslaught of evolving creeps! Step into a twisted, hyper 3D, mind bending realm.
89% of 473 Steam reviews are positive$19.99