
Aliens Falling from the Sky? reimagines tower defense with intense action and tactical depth. Build, upgrade, and combine powerful towers to stop relentless alien waves — because somehow, saving the world is your problem now.
60+ similar titles based on shared tags and player behavior. Themes include Tower Defense, Strategy, Singleplayer, Indie.

Aliens Falling from the Sky? reimagines tower defense with intense action and tactical depth. Build, upgrade, and combine powerful towers to stop relentless alien waves — because somehow, saving the world is your problem now.

Bumper Blitz TD
Bumper Blitz TD redefines tower defense with gravity-powered physics and dynamic gameplay. Build, upgrade, and bounce enemies away in this thrilling fusion of strategy and action!

Space Nature Attack Tower Defense
Space Nature Attack TD is a tower defense where you can level up and customize tower stats and elements to your liking! Fend off various types of alien creatures across many different sci-fi planet themed maps, biomes, and difficulties!
Bumper Blitz TD redefines tower defense with gravity-powered physics and dynamic gameplay. Build, upgrade, and bounce enemies away in this thrilling fusion of strategy and action!
Why similar: Tower Defense 40.4%, Aliens 14.8%, Space 10.9%, Top-Down 9.7%, Strategy 9%
Space Nature Attack TD is a tower defense where you can level up and customize tower stats and elements to your liking! Fend off various types of alien creatures across many different sci-fi planet themed maps, biomes, and difficulties!
Why similar: Tower Defense 39.9%, Aliens 14.2%, Strategy 13.8%, Top-Down 12.6%, Space 10.7%
Space Run is a «real-time spaceship construction strategy game». Space Run takes the well-known Tower Defense-style gameplay and twists it, challenging you to manage and protect a spaceship and its cargo against the hazards of deep space!
Why similar: Tower Defense 59.3%, Space 24.5%, Strategy 12.2%, Indie 2.2%, Action 1.1%
Defend the solar system from fearsome aliens by sending satellites into orbit in revolutionary tower defense action!
Why similar: Tower Defense 67.6%, Strategy 11.4%, Aliens 9.2%, Space 6.1%, Action 3.5%
Space Run Galaxy is the sequel to Space Run, the game from one-man studio Passtech, which seduced hundreds of thousands of players with its dynamic and original gameplay. By twisting the tower-defense game style, Space Run offered an addictive real-time spaceship construction strategy experience.
Why similar: Tower Defense 55.6%, Strategy 20.2%, Space 20.1%, Indie 4.1%
Spaceships and Cellular Automata is a tower defense game set in space! Place different towers to defend your ship against the waves of aliens. The enemies are simulated based on Conway's Game of Life. Even just one of your bullets is enough to cause a destabilizing chain reaction to destroy them!
Why similar: Tower Defense 46.1%, Space 22.5%, Strategy 14.5%, Aliens 14.4%, Indie 1.5%
A tower defense strategy science fiction game, in the future era, when aliens invade the solar system, players need to build various turrets to resist alien attacks and guard the Milky Way and solar system.
Why similar: Tower Defense 44.1%, Aliens 15.9%, Strategy 15.2%, Space 12.1%, Top-Down 10.6%
The ultimate mash-up of Real-time Strategy and Tower Defense!
Why similar: Tower Defense 65.1%, Strategy 12.8%, Aliens 8.6%, Top-Down 5.6%, Action 3.5%
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?
Why similar: Tower Defense 39.1%, Aliens 16.8%, Space 15.3%, Top-Down 14.2%, Strategy 9.6%
Asteria is under siege! Take up arms as the commander and find the perfect strategy in this hero filled tower defense game. Will you become a Defender of Asteria or fall short?
Why similar: Tower Defense 56.7%, Strategy 20.2%, Top-Down 18.8%, Singleplayer 2.2%, Indie 2.1%
Stop the sailors from getting to their boat to fish the seas. Unite and use the creatures of the sea to prevent this from happening. Use physics to push and pull them off the dock before they can get there in this goofy physics based tower defense.
Why similar: Tower Defense 45.6%, Strategy 20.2%, Physics 17.4%, Top-Down 11.6%, Indie 2.8%
Dead TD is a tower defense game that was inspired by the old school original maps from WC3. It features a wide range of towers that upgrade into more powerful types and features a range of different abilities that can be used to create the ultimate defense.
Why similar: Tower Defense 59.5%, Strategy 20.7%, Top-Down 17.5%, Singleplayer 2.3%
Lead an armored squad through the perils of this reversed tower defense action-strategy game!
Why similar: Tower Defense 48.4%, Strategy 25.3%, Aliens 8.9%, Action 6%, Top-Down 5.7%
Terra Forma is a pixelated 2D tower defense, inspired by Flash-age classics. Build a dozen unique towers and create even more fusions by combining shock, ice, fire, and iron. Prove your command prowess one final time, and defend mankind's final hope.
Why similar: Tower Defense 50.2%, Strategy 16.4%, Top-Down 15%, Aliens 9.4%, Action 6.3%
An epic, challenging tower defense game with an emphasis on strategy and replayability. Summon gems of immense magical potency and harness their unique abilities against a seemingly endless horde of monsters. The archdemon seeks to swallow the world, and you must journey to stand against her.
Why similar: Tower Defense 74.7%, Strategy 12.8%, Top-Down 6.4%, Action 2.3%, Indie 2.2%
Command a team of 5 elite soldiers against an alien horde of 100,000. Surrounded on all sides, you must outmaneuver and outsmart the enemy.
Why similar: Tower Defense 43.4%, Strategy 17.6%, Top-Down 15.6%, Aliens 12.9%, Action 5.5%
Defend the clearance shelf. When the lights go out, the seasonal war begins. Lead your unsold Easter stock against waves of full-price enemies — before morning reveals the secret.
Why similar: Tower Defense 53.7%, Strategy 25.1%, Top-Down 18.8%, Singleplayer 2.4%
Iron Line is a tower defense game where you are one of a few, train conductors capable of traversing on the Iron Line. Will you survive the onslaught, or get an express ticket to the afterlife?
Why similar: Tower Defense 50.8%, Strategy 16.7%, Top-Down 14.9%, Aliens 14.8%, Indie 1.7%
An incredible asteroid assault is about to begin! Take command of the planet's defenses and prevent extinction in this planetary Tower Defense game.
Why similar: Tower Defense 42.1%, Strategy 29.1%, Space 23.6%, Indie 2.9%, Singleplayer 2.4%
Defense Grid: The Awakening is a unique spin on tower defense gameplay that will appeal to players of all skill levels. A horde of enemies is invading, and it's up to the player to stop them by strategically building fortification towers around their base.
Why similar: Tower Defense 77.5%, Strategy 10.9%, Aliens 8.1%, Indie 1.9%, Singleplayer 1.6%
Anomaly Defenders is the closing installment of the Anomaly series. The original incarnation of the Tower Offense sub-genre had players controlling humans fighting alien invaders. Now, the tables have turned. The human counterattack is underway and the alien homeworld is under threat.
Why similar: Tower Defense 68.1%, Strategy 20.1%, Action 7.7%, Indie 4.1%
In this uniqueTower Defense you will travel through William’s mind in a colored and dreamlike universe.
Why similar: Tower Defense 69.2%, Strategy 17.9%, Action 7.1%, Indie 5.8%
Operation Sheep Defense is a fast paced tower defense game. Featuring dynamic levels and intelligent enemy behavior. Shape the enemy path or defend maze-like levels. Levels are short and intense.
Why similar: Tower Defense 65.8%, Strategy 16%, Top-Down 11.7%, Indie 4.2%, Singleplayer 2.3%
Rush for Glory is featuring challenging and rewarding Tower Defense battles, in which players are defending their base against an alien invasion. By strategically building towers and upgrading them, the player can keep his base safely and further progress through the extensive singleplayer campaign.
Why similar: Tower Defense 71.8%, Strategy 20.5%, Action 7.8%
Celestial Wardens is a sci-fi tower defense game where you command a lone spaceship to defend a planet under siege. Survive waves of enemies, build turrets, upgrade your ship, and manage your planet to prevent total annihilation.
Why similar: Tower Defense 44.9%, Space 19.2%, Strategy 11.8%, Aliens 11.6%, Top-Down 10.2%
Space Base is an action-packed tower defence game, where you aim to protect your planets from the incoming forces of enemy ships and aliens by any means necessary. Build up your defences as stronger and stronger waves of enemies arrive to reach the highest score possible.
Why similar: Tower Defense 44%, Top-Down 15.7%, Strategy 13.1%, Aliens 12.7%, Space 12.1%
Selknam Defense is more than an exceptional strategy game. It’s a gateway to the past that puts a nation’s destiny into your control. Do you have the skills to alter history and save the Selknam?
Why similar: Tower Defense 67.7%, Strategy 21.3%, Indie 5.7%, Action 5.4%
Beware Planet Earth! is a beguiling mix of classic tower defense and time management coming to PC via Steam for the first time. Save your cows from the Martian invasion by building an effective defense using towers, traps and objects, and also by firing your Zapper directly at the invading force of little green men!
Why similar: Tower Defense 55.9%, Aliens 19.7%, Strategy 10.5%, Space 6.5%, Top-Down 4.6%
A sci-fi tower defense game. Build an army of towers to stop waves of a lured alien species called Zektid's.
Why similar: Tower Defense 40.1%, Aliens 19.1%, Strategy 16.9%, Space 12.4%, Action 8.9%
Witch Sacrifice - you have to defend your lands from three cruel kings. A huge army is advancing on your swamps, which you have to stop.
Why similar: Tower Defense 46.6%, Strategy 21.9%, Top-Down 17.3%, Action 10.2%, Indie 2.2%
Starfall Defenders is a classic tower defense game that features unique towers and enemies. It also has an in-game shop system that allows players to purchase better towers, upgrade existing ones, and buy special items like the Atom Bomb, Splash Bomb, and Air Supply.
Why similar: Tower Defense 40.1%, Space 17.5%, Strategy 15.4%, Aliens 12.3%, Top-Down 8.1%
Stunning detail of levels, in-depth gameplay, finely tuned balance of all levels and turrets. The new, engaging levels are even more stunning and impressive.
Why similar: Tower Defense 77.6%, Strategy 18%, Indie 4.4%
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.
Why similar: Tower Defense 42.9%, Space 17.5%, Aliens 13.3%, Strategy 12.5%, Top-Down 9.1%
You are an archer tasked with defending a castle from invading monsters. Inside the castle, you can manage resources and harvest crops, gather experience points to level up, and learn new skills and abilities to face stronger enemies.
Why similar: Tower Defense 70.9%, Strategy 17.1%, Action 8.1%, Singleplayer 2.5%, Indie 1.3%
Build your towers of paper before they get out of the box and make a big mess in the room. Manage the turrets, upgrade and be careful where you put them... every decision can be fatal! Watch out for the air units, they have a different route!
Why similar: Tower Defense 74.9%, Strategy 20.1%, Indie 5%
Stunning detail of levels, in-depth gameplay, finely tuned balance of all levels and turrets. During the game you will hold your defense with your turrets against the massive hordes of enemies.
Why similar: Tower Defense 73.5%, Strategy 21.3%, Indie 5.2%
iBomber Defense combines classic tower defense gameplay with intense action and strategy. Keep enemies at bay all over the world using a variety of weapons and tactics, from rattling Machine guns, explosive cannons and awesome anti-aircraft artillery!
Why similar: Tower Defense 75.2%, Strategy 20.2%, Indie 4.6%
Get ready to DEFEND THE WORLD! The biggest sequel in tower defense history is finally here: Fieldrunners 2 has arrived! From Subatomic Studios, creators of the award winning classic strategy game comes an all new adventure that was years in the making.
Why similar: Tower Defense 82.2%, Strategy 12.9%, Action 4.9%
Planetoid is a physics based building game in which you construct facilities and protect humanoids on the planetoid. Build a facilities which can defeat the enemies on your way.
Why similar: Tower Defense 34.2%, Space 21.9%, Strategy 15%, Physics 13.2%, Indie 8.5%
The only tower defense game in the world that is played in the terminal. I didn't make this game because it was a good idea, I made it because I thought it was cool.
Why similar: Tower Defense 58.1%, Strategy 20.6%, Top-Down 19.4%, Singleplayer 1.8%
Defense Technica is the next evolution in hardcore tower defense strategy games. Protect the core from an onslaught of unrelenting biomechanical terrors with a powerful range of tower defense units – each with their own upgradable features and methods of attacks.
Why similar: Tower Defense 83.8%, Strategy 13.2%, Indie 3%
Tiny Toyfare is a Tower Defense/FPS hybrid with a focus on strategic calm followed by twitch action. Construct powerful towers, recruit adorable squads and fight off the Dino invasion!
Why similar: Tower Defense 56.9%, Strategy 24.4%, Action 11.7%, Indie 7%
Tiestru offers a new perspective to strategy games. The player has control all over the map and defines his strategy with the structures that he builds. Each structure, each connection, each location offer new and enhanced powers. In this deep and complex game everything is up to you! Define your strategy!
Why similar: Tower Defense 57.5%, Strategy 23.6%, Action 12.4%, Indie 6.5%
The biggest installment of the award winning Sentinel sci-fi tower defense series now on PC!Take the fight to the alien homeworld and unleash a massive arsenal of weaponry. Get up close and personal on the battlefield in your power armor to execute devastating attacks and support your defenses! * An epic campaign across 20 levels.
Why similar: Tower Defense 83%, Strategy 14%, Indie 3%
Get ready for modern battles! Defend your islands against evil invaders in jungles! Your team will consist of modern snipers, gunners, rockets, ice towers and other great things. A deep conflict has been brewing between you and the evil invaders. Fight to protect your freedom and liberty.
Why similar: Tower Defense 62.8%, Strategy 24.9%, Action 7.7%, Indie 4.6%
Just Updated! Version 1.1 now has 6 New online Mayhem levels, Character Customization, 35 Defense levels, 25 Skirmish levels, and more!
Why similar: Tower Defense 74%, Strategy 19.5%, Indie 5.2%, Singleplayer 1.4%
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 strongly oppose your attempts of colonizing their planet! Deluxe version includes the soundtrack!
Why similar: Tower Defense 55.8%, Strategy 25.3%, Action 12.2%, Indie 6.7%
Evil Defenders is a fun, frenetic defense game: build and upgrade your towers, сast spells to repel enemy forces, use special landmarks and defend the Lands of Evil from invaders! Feel free to play the game in many different ways through unique tower upgrades, a deep skill tree and 100 in-game achievements.
Why similar: Tower Defense 79.5%, Strategy 16.8%, Indie 3.7%
Harvest: Massive Encounter is an award-winning real-time strategy game with battles of epic proportions and a unique style of resource management and exploration. Build power plants, mineral harvesters and defense towers and make sure they have sufficient energy to fend off endless hordes of evil aliens.
Why similar: Tower Defense 71%, Strategy 21.9%, Indie 5.6%, Singleplayer 1.6%
Prepare to defend your village in Champi, a captivating Tower-Defense where your mission is to repel a invasion of mutated mushrooms.
Why similar: Tower Defense 53.5%, Strategy 24.1%, Top-Down 17.2%, Singleplayer 3%, Indie 2.2%
A Tower Defence game, that actually allows you to sit inside the turret and come face-to-face with the enemies! Addictive strategy - action game, with loads of shooting and explosions! Nearing 2 MILLION DOWNLOADS!
Why similar: Tower Defense 54.1%, Strategy 29%, Action 11%, Indie 5.9%
Fieldrunners is now available on Steam! Download it now to play the hit tower defense game critics and fans have been raving about. Descend into the world of Fieldrunners, the most anticipated and visually stunning game in tower defense history!
Why similar: Tower Defense 81.6%, Strategy 14.6%, Indie 3.8%
The sequel to the hit strategy game, with new weapons, landscapes, and options.
Why similar: Tower Defense 53.3%, Strategy 27.8%, Action 12.3%, Indie 6.6%
Crumbled World is a tower defense game where you're tasked to create a maze of defensive structures with the purpose to defend the world crystal. The world crystal is what keeps the world from further collapsing into darkness and without it no hope exists.
Why similar: Tower Defense 67.5%, Strategy 25.5%, Indie 7%
Defeat hordes of imps in the very first Tower Defence game about the order of monks! All this to defend humankind from hordes of demons!
Why similar: Tower Defense 72.7%, Strategy 27.3%
Rampart Defense is a classic tower defense game where you strategically deploy troops and vehicles to protect your colony from waves of enemies.
Why similar: Tower Defense 58.3%, Strategy 20.4%, Top-Down 18.2%, Indie 1.6%, Singleplayer 1.5%
Build towers and learn abilities to defend against swarms of hundreds of on-screen hostile alien creatures. Choose between sets of randomized upgrades that both upgrade you and the alien swarm. From enormous explosions to far-reaching flamethrowers, no two games are the same.
Why similar: Tower Defense 38%, Aliens 24%, Space 12.4%, Strategy 10.8%, Top-Down 9.6%
Classic Tower Defense Game; Completed development, no Early Access; No Pay to Win; Ad-free
Why similar: Tower Defense 50.1%, Strategy 22.9%, Top-Down 19.4%, Action 3.7%, Indie 2.1%