- #1 Space Run
97% matchVery Positive85% of 2,123 reviews2014
Dev: Passtech GamesPub: Focus Entertainment
Windows · Mac · Linux
Median: 5.1 hrsMean: 7.2 hrs≥1hr: 93%
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 54.7%, Space 25%, Strategy 14.5%, Sci-fi 4.1%, Indie 1.4%
- #2 Space Run Galaxy
96% matchMixed64% of 1,027 reviews2016
Dev: Passtech GamesPub: Focus Entertainment
Windows
Median: 3.3 hrsMean: 5.3 hrs≥1hr: 92%
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 52.2%, Strategy 24.3%, Space 20.8%, Indie 2.7%
- #3 Bluevolution
96% match4 user reviews100% of 4 reviews2020
Dev: Johan Bägerfeldt
Windows
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 37.3%, Strategy 33.1%, Space 23.1%, 2D 3.5%, Indie 1.8%
- #4 Revenge of the Titans
95% matchVery Positive82% of 1,250 reviews2011
Dev: Puppygames
Windows · Mac · Linux
Median: 2.1 hrsMean: 4.4 hrs≥1hr: 82%
The ultimate mash-up of Real-time Strategy and Tower Defense!
Why similar: Tower Defense 61.7%, Strategy 15.6%, Aliens 5.5%, Pixel Graphics 5%, Sci-fi 4.7%
- #5 Unstoppable Gorg
94% matchMostly Positive79% of 306 reviews2012
Dev: Futuremark
Windows · Mac
Median: 36 minMean: 6.3 hrs≥1hr: 40%
Defend the solar system from fearsome aliens by sending satellites into orbit in revolutionary tower defense action!
Why similar: Tower Defense 67.1%, Strategy 14.4%, Space 6.6%, Aliens 6.2%, Sci-fi 4.2%
- #6 Modo Defence
94% match3 user reviews33% of 3 reviews2023
Dev: PASTEL
Windows
Modo Defense is a strategy tower defense game. Spin yut, similar to dice, to obtain various resources and summon or strengthen towers. You can customize your tower however you like. Specialize in multi-attack or strong one-by-one! And we have to stop the demons coming in. How far can you stop it?
Why similar: Tower Defense 58.1%, Strategy 25.2%, Pixel Graphics 10.2%, 2D 5.1%, Singleplayer 1.4%
- #7 Aliens falling from the Sky?
93% matchNo user reviews
Dev: Starcradle Studio
Windows · Mac · Linux
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.
Why similar: Tower Defense 46.1%, Space 22.5%, Strategy 14.5%, Aliens 14.4%, Indie 1.5%
- #8 Space Nature Attack Tower Defense
92% matchPositive92% of 13 reviews2024
Dev: Lead Games
Windows
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 46.8%, Strategy 20.8%, Space 13.9%, Aliens 11.2%, Sci-fi 5.1%
- #9 Dungeon Warfare 2
91% matchVery Positive90% of 1,138 reviews2018
Dev: Valsar
Windows · Mac
Median: 5.2 hrsMean: 15.3 hrs≥1hr: 93%
Become a dungeon lord to defend your dungeons with the deadliest of traps and insidious contraptions against greedy adventurers and wannabe heroes.
Why similar: Tower Defense 56.3%, Strategy 31%, Pixel Graphics 6.2%, Indie 4.2%, 2D 2.3%
- #10 Defense Grid: The Awakening
91% matchOverwhelmingly Positive96% of 5,303 reviews2008
Dev: Hidden Path Entertainment
Windows
Median: 4.6 hrsMean: 15.1 hrs≥1hr: 91%
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 74.2%, Strategy 13.4%, Aliens 5.2%, Sci-fi 5%, Indie 1.3%
- #11 Bumper Blitz TD
90% matchNo user reviews
Dev: Ragnarok StudiosPub: Mad Data Games
Windows · Mac · Linux
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 50.6%, Space 15%, Strategy 14.5%, Aliens 12.5%, 2D 4.9%
- #12 Space Cycle
89% matchVery Positive94% of 198 reviews2024
Dev: Some Sugar Studio
Windows
Space resources are the battleground for warring factions. As a Space Defense Officer, protect your faction's assets in a vast, hostile universe. Allocate resources, upgrade defenses, and repel relentless enemy attacks! With over 50 unique units and deep strategy, experience real-time tower defense!
Why similar: Tower Defense 47.1%, Space 26.5%, Strategy 15.5%, Sci-fi 7.9%, Indie 1.8%
- #13 Harvest: Massive Encounter
88% matchMostly Positive79% of 159 reviews2009
Dev: Oxeye Game Studio
Windows · Mac · Linux
Median: 1.2 hrsMean: 3.9 hrs≥1hr: 54%
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 65%, Strategy 25.7%, Sci-fi 5%, Indie 3.6%, Singleplayer 0.8%
- #14 Phantom Signal — Sci-Fi Strategy Game
87% matchVery Positive85% of 155 reviews2018
Dev: Veslo Games
Windows · Mac · Linux
Median: 4.6 hrsMean: 5.9 hrs≥1hr: 94%
Phantom Signal is a real-time sci-fi strategy game with unusual mechanics. Explore mysterious star systems and reveal the secret of the phantom signal.
Why similar: Tower Defense 40.8%, Strategy 25.5%, Space 24.6%, Sci-fi 6.9%, Indie 1.5%
- #15 Starfall Defenders
86% match1 user reviews100% of 1 reviews2025
Dev: EntwicklerX
Windows
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 37.5%, Strategy 18.5%, Space 18%, Arcade 10.9%, Aliens 7.7%
- #16 Unearthing Invasions
85% match5 user reviews100% of 5 reviews2024
Dev: Aquarius Max
Windows · Mac · Linux
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 40.7%, Space 17.5%, Strategy 12.8%, Aliens 11.8%, Arcade 10.7%
- #17 Beware Planet Earth
86% matchMostly Positive72% of 336 reviews2014
Dev: Lightmare StudioPub: Jumping Ram
Windows
Median: 4.2 hrsMean: 5.0 hrs≥1hr: 95%
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 53.5%, Strategy 13%, Aliens 12.8%, Space 6.9%, Arcade 5.1%
- #18 Sentinel 3: Homeworld
84% matchMostly Positive80% of 148 reviews2014
Dev: Origin8Pub: Strategy First
Windows
Median: 3.9 hrsMean: 16.9 hrs≥1hr: 73%
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 78.1%, Strategy 16.9%, Sci-fi 3.1%, Indie 2%
- #19 Holy Towers
84% match8 user reviews38% of 8 reviews2018
Dev: PlayFlock Two
Windows
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 67.5%, Strategy 32.5%
- #20 Defense Zone
83% matchVery Positive83% of 83 reviews2014
Dev: Artem Kotov
Windows · Mac · Linux
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 70.3%, Strategy 26.2%, Indie 3.5%
- #21 War in a Box: Paper Tanks
82% matchMostly Positive71% of 208 reviews2014
Dev: DQ Team
Windows · Mac · Linux
Median: 42 minMean: 9.5 hrs≥1hr: 43%
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 71.9%, Strategy 24.7%, Indie 3.4%
- #22 Smile To Fly
82% matchPositive90% of 10 reviews2019
Dev: no.rest
Windows
Mine gold and electricity in your own space colony, find new inhabitants in space, and eventually make them happy - because the energy of happiness through smile-to-fly technology can be transformed into rocket fuel!
Why similar: Strategy 27.7%, Tower Defense 26.9%, Space 21.2%, Pixel Graphics 8.7%, Arcade 8.2%
- #23 Anomaly: Warzone Earth
81% matchVery Positive87% of 4,668 reviews2011
Dev: 11 bit studios
Windows · Mac · Linux
Median: 2.4 hrsMean: 11.0 hrs≥1hr: 88%
Lead an armored squad through the perils of this reversed tower defense action-strategy game!
Why similar: Tower Defense 49.6%, Strategy 33.2%, Sci-fi 7%, Aliens 6.2%, Indie 2.9%
- #24 Defense Zone 2
81% matchVery Positive85% of 162 reviews2014
Dev: Artem Kotov
Windows · Mac · Linux
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 74.8%, Strategy 22.3%, Indie 3%
- #25 Galaxy Defenders (Classic TD)
79% matchNo user reviews100% of 1 reviews2025
Dev: Galaxy Developer
Windows
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 41.3%, Space 18.6%, Strategy 15.5%, Arcade 10.7%, Aliens 8.6%
- #26 iBomber Defense
80% matchMostly Positive74% of 244 reviews2011
Dev: Cobra Mobile
Windows · Mac
Median: 1.3 hrsMean: 7.0 hrs≥1hr: 54%
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 72.1%, Strategy 24.8%, Indie 3.1%
- #27 TeeDee
78% matchMostly Positive79% of 24 reviews2025
Dev: NIHmpact
Windows
A minimalist 2D tower defense game with 3 towers, 6 maps, and 4 monster types. Simple, fun, and perfect for quick strategy sessions!
Why similar: Tower Defense 51.2%, Strategy 29.6%, Pixel Graphics 11.8%, 2D 4.8%, Indie 1.5%
- #28 Rampart Defense
78% matchNo user reviews
Dev: B.V.SPub: Retro Box Game Studio
Windows · Linux
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 53.9%, Strategy 24.2%, Pixel Graphics 10%, Sci-fi 5.7%, 2D 4.4%
- #29 Portal Defense
77% matchPositive82% of 22 reviews2022
Dev: Stealthy Wolves Studios LLC
Windows
Our game is a basic tower defense game where monsters are coming in through a portal are trying to destroy your tower! The only way to stop them is to send out your units, level up your tower and try to outwit them!
Why similar: Tower Defense 57%, Strategy 25.7%, Pixel Graphics 11.8%, 2D 4%, Singleplayer 1.6%
- #30 Slime Virus Defense
77% matchNo user reviews
Dev: ES Studio
Windows
Slime Virus Defense is a 2D strategy game where animal towers defend your computer from invading virus-like slimes. Use unique tower classes and skills to develop strategies and stop the slime invasion before it's too late!
Why similar: Tower Defense 48.5%, Strategy 27.8%, Pixel Graphics 11.2%, Sci-fi 5.8%, 2D 4.6%
- #31 Near Miss
75% match2 user reviews50% of 2 reviews2025
Dev: Bobtilian
Windows
Defend your planet from relentless stream of incoming asteroids in this fast-paced 2D tower defence game. Strategically place defensive buildings and upgrade your arsenal to protect your world from destruction!
Why similar: Tower Defense 47.7%, Strategy 20.8%, Space 16.5%, Sci-fi 5.5%, Pixel Graphics 4.3%
- #32 Explodey Towers
76% matchNo user reviews
Dev: MangoStick
Windows
A roguelike tower defense where you manage a single tower. Build your tower blocks to fend of waves of enemies. Enemies will adapt to your build, so don't be afraid to explode and rebuild!
Why similar: Tower Defense 58%, Strategy 25.1%, Pixel Graphics 10.2%, 2D 4.2%, Indie 1.4%
- #33 Anomaly Defenders
75% matchMostly Positive77% of 676 reviews2014
Dev: 11 bit studios
Windows · Mac · Linux
Median: 3.2 hrsMean: 5.7 hrs≥1hr: 89%
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 68.4%, Strategy 25.9%, Indie 2.9%, Sci-fi 2.7%
- #34 银河战争一(Galactic Wars One)
73% match1 user reviews100% of 1 reviews2024
Dev: hidden dragon独游
Windows
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 47.8%, Strategy 21.1%, Space 14.5%, Aliens 11.7%, Sci-fi 3.4%
- #35 Crumbled World
74% match8 user reviews50% of 8 reviews2016
Dev: Clone Corps
Windows · Linux
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 64.2%, Strategy 31.1%, Indie 4.7%
- #36 Terra Forma: Tower Combat
73% match2 user reviews100% of 2 reviews2024
Dev: Fat Pigeon Studio
Windows
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 52.6%, Strategy 22%, Pixel Graphics 7.9%, Aliens 6.6%, Sci-fi 5.2%
- #37 Defense Technica
74% matchMostly Negative40% of 188 reviews2013
Dev: Kuno Interactive
Windows · Mac
Median: 3.4 hrsMean: 4.6 hrs≥1hr: 95%
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 81.5%, Strategy 16.5%, Indie 2.1%
- #38 Cubemen
73% matchMostly Positive71% of 511 reviews2012
Dev: 3 SprocketsPub: 3 Sprockets
Windows · Mac · Linux
Median: 36 minMean: 3.6 hrs≥1hr: 35%
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 71.6%, Strategy 24.1%, Indie 3.5%, Singleplayer 0.8%
- #39 Project Myriad 2
72% match4 user reviews75% of 4 reviews2022
Dev: RoninGameDevPub: Jumpmen Gaming LLC
Windows
Project Myriad 2 is a tower defense strategy game. Build towers on a grid of hexagons floating in space. 35 levels with unique tiles and mechanics each providing a unique challenge. 3 difficulty levels including extreme mode which has never ending waves of enemies. Strive for your new high score!
Why similar: Tower Defense 49.5%, Strategy 20.2%, Arcade 12%, Space 9.8%, 2D 3.6%
- #40 GemCraft - Chasing Shadows
71% matchVery Positive95% of 4,334 reviews2015
Dev: Game in a BottlePub: Armor Games Studios
Windows
Median: 4.6 hrsMean: 19.2 hrs≥1hr: 91%
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 79%, Strategy 17.3%, Indie 1.7%, 2D 1%, Singleplayer 1%
- #41 Evil Defenders
71% matchVery Positive82% of 395 reviews2015
Dev: CP Decision
Windows · Mac
Median: 4.8 hrsMean: 11.8 hrs≥1hr: 94%
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 76.7%, Strategy 20.8%, Indie 2.5%
- #42 Selknam Defense
72% matchMixed42% of 57 reviews2014
Windows · Mac
Median: 30 minMean: 1.7 hrs≥1hr: 33%
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 68.4%, Strategy 27.6%, Indie 4%
- #43 Kreeps
70% matchMostly Positive78% of 18 reviews2023
Dev: WaterDemon
Windows
Kreeps is a tower defense game where you choose how your towers and the enemies scale as the game progresses. Use any combination of 7 different types of towers and weapons to defend against the growing Kreep horde.
Why similar: Tower Defense 59.4%, Strategy 25%, Pixel Graphics 10.3%, 2D 4.3%, Singleplayer 0.9%
- #44 Rush for Glory
71% matchMixed61% of 148 reviews2014
Dev: Parseh Game StudioPub: KATNAPPE SP. Z O. O.
Windows
Median: 24 minMean: 29.8 hrs≥1hr: 34%
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 73.2%, Strategy 26.8%
- #45 Bots Rush
70% match3 user reviews100% of 3 reviews2018
Dev: Ponomarev Denis
Windows
Bots Rush is a unique mix of Tower Defense and logistic puzzle. You will find a set of interesting and complicated game levels, original enemies. Your task is simply to build a network of roads to deliver resources to factories and ammo to towers. Sounds easy, right? Lets check this out.
Why similar: Tower Defense 60.1%, Strategy 34.9%, Indie 5%
- #46 Twinkle☆Guardians
68% matchPositive96% of 24 reviews2024
Dev: Chiham
Windows
A tower defense game about about 10 guardians who protect crystals.Anyway, It's Simple!But it's a bit challenging!Defend the crystal from a large number of demons and become a legendary guardian!
Why similar: Tower Defense 64.6%, Strategy 27.7%, 2D 4.7%, Indie 1.7%, Singleplayer 1.4%
- #47 Space Adventure TD
70% match2 user reviews0% of 2 reviews2019
Dev: Raphael B.
Windows
A Tower Defense game made in the best tradition with 35 unique towers, 70 upgrades and 8 biomes. A 20 level campaign and 2 challenge levels for now, with more to come! Made by an indie developper.
Why similar: Tower Defense 53.7%, Strategy 42.6%, Indie 2.1%, Singleplayer 1.6%
- #48 Fieldrunners
69% matchMixed66% of 343 reviews2012
Dev: Subatomic Studios LLC
Windows · Mac
Median: 54 minMean: 10.8 hrs≥1hr: 48%
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 79.3%, Strategy 18.2%, Indie 2.6%
- #49 The Defender: Farm and Castle
67% matchVery Positive89% of 1,091 reviews2019
Dev: Kobsoft Kitti
Windows
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 71.3%, Strategy 22.1%, 2D 4.2%, Singleplayer 1.5%, Indie 0.9%
- #50 Outer Wards: Proving Grounds
67% matchNo user reviews
Dev: Stacra
Windows
Build up your defenses and ward off any threats to your expedition in this rogue-like tower defense game. Manage your resources well and make sure no to overstay your welcome on this planet, or be prepared to face a never-ending onslaught of crustaceans...
Why similar: Tower Defense 45.8%, Strategy 14.8%, Space 11.1%, Pixel Graphics 10.3%, Aliens 7.4%
- #51 Dead TD
68% match2 user reviews100% of 2 reviews2021
Dev: Aaron Mault
Windows
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 64.5%, Strategy 28.9%, 2D 5.2%, Singleplayer 1.4%
- #52 We Are the Universe
67% match1 user reviews100% of 1 reviews2023
Dev: Uncle Grouch Gaming
Windows
Sci-fi tower defense where you create your own maze, manage drones and power levels, and harvest for resources. Upgrade your turrets, buildings and ground units. Upgrade and buy new vehicles and motherships.
Why similar: Tower Defense 61.3%, Strategy 23.1%, Sci-fi 11.3%, Indie 2.4%, Singleplayer 1.8%
- #53 Sawmania
65% matchPositive82% of 11 reviews2025
Dev: Bug Bounty Games
Windows · Mac · Linux
Protect your base against an onslaught of monsters using your mighty saw!
Why similar: Tower Defense 44.7%, Strategy 19.9%, Arcade 11.7%, Space 8.7%, Pixel Graphics 6.9%
- #54 Shad'O
67% matchMixed55% of 127 reviews2012
Dev: Okugi StudioPub: Okugi Sudio
Windows
Median: 2.0 hrsMean: 3.6 hrs≥1hr: 68%
In this uniqueTower Defense you will travel through William’s mind in a colored and dreamlike universe.
Why similar: Tower Defense 71.9%, Strategy 23.9%, Indie 4.2%