- #1 DG2: Defense Grid 2
97% matchVery Positive86% of 3,392 reviews2014
Dev: Hidden Path Entertainment
Windows
Median: 5.9 hrsMean: 11.3 hrs≥1hr: 89%
Great strategy is timeless. Build, adapt, and defend across dynamic maps, solo or online - every session brings new strategies, new solutions, and new surprises. Now is the perfect time to enter the grid.
Why similar: Tower Defense 27.1%, Aliens 16.8%, Tactical 14.6%, Space 11.5%, Sci-fi 11.2%
Why You'll Like It: The sequel to the classic original, it refines the sci-fi tower defense formula with modern graphics and complex level design.
- #2 Defense Grid: The Awakening
96% matchOverwhelmingly Positive96% of 5,324 reviews2008
Dev: Hidden Path Entertainment
Windows
Median: 4.6 hrsMean: 15.0 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 69.6%, Sci-fi 10.5%, Strategy 10.2%, Aliens 7.6%, Singleplayer 2.1%
Why You'll Like It: This title is widely considered the gold standard for sci-fi tower defense, offering the same tactical depth and polish found in 2112TD.
- #3 X-Morph: Defense
96% matchVery Positive91% of 4,115 reviews2017
Dev: EXOR Studios
Windows
Median: 3.0 hrsMean: 5.5 hrs≥1hr: 85%
Unique fusion of a top-down shooter and tower defense strategy. You are the invader! Use destructive weapons or lead your enemies into a maze of towers. Strategize in the build mode by carefully selecting various types of alien towers or throw yourself right into the heat of the battle.
Why similar: Tower Defense 37.9%, Aliens 16.2%, Isometric 14.2%, Sci-fi 10%, Strategy 8.4%
Why You'll Like It: This game masterfully blends top-down shooter action with tower defense mechanics in a high-stakes sci-fi environment.
- #4 Taur
95% matchMostly Positive80% of 2,092 reviews2020
Dev: Echo Entertainment
Windows
Median: 4.2 hrsMean: 6.8 hrs≥1hr: 76%
Taur is an action-strategy sci-fi game. Control the Prime Cannon and unlock all of its powerful weapons and abilities. Build turrets, droids, aircraft and more as you fight to protect the homeworld of the Tauron droids against a relentless invasion. Will your Taur stand against the Imperion warmachine?
Why similar: Tower Defense 49.9%, Strategy 12.7%, Sci-fi 10.8%, Tactical 9.4%, Space 6.1%
Why You'll Like It: Focuses on defending a base against massive waves of sci-fi enemies using tactical weapon systems and base-building.
- #5 Infested Planet
94% matchVery Positive94% of 3,025 reviews2014
Dev: Rocket Bear Games
Windows
Median: 3.1 hrsMean: 5.9 hrs≥1hr: 88%
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 35.4%, Strategy 15.1%, Top-Down 11.6%, Aliens 11.2%, Sci-fi 9.6%
Why You'll Like It: Captures the survival and tactical RTS feel of 2112TD by tasking players with holding ground against endless alien swarms.
- #6 Mechs V Kaijus - Tower Defense
94% matchVery Positive84% of 538 reviews2022
Dev: Doble Punch Games
Windows
Median: 6.8 hrsMean: 13.1 hrs≥1hr: 82%
Mechs V Kaijus is an addictive hardcore tower defense gameplay. In Mechs V Kaijus you take on the role of Commander of a powerful Mechs squadron. Improve your Mech, strategically place towers and factories on the battlefield. Deploy support units on the battlefield, and save our civilization.
Why similar: Tower Defense 78.7%, Strategy 9.6%, Tactical 7%, Action 3.4%, Singleplayer 1.3%
Why You'll Like It: Features the same sci-fi tactical combat and base defense focus, pitting powerful mechs against massive threats.
- #7 Iron Marines
93% matchMostly Positive78% of 1,847 reviews2019
Dev: Ironhide Game Studio
Windows · Mac · Linux
Median: 5.1 hrsMean: 11.4 hrs≥1hr: 87%
Real-time strategy battles in amazing sci-fi worlds! Command brave soldiers, mighty mechas and powerful aliens to face the greatest challenges in hostile alien worlds. The galaxy needs you!
Why similar: Aliens 27.6%, Sci-fi 22.3%, Space 16.5%, Strategy 15.8%, 2D 6.8%
Why You'll Like It: An RTS-TD hybrid that captures the same sci-fi tactical feel and unit management as the seed game.
- #8 Anomaly Defenders
92% matchMostly Positive77% of 680 reviews2014
Dev: 11 bit studios
Windows · Mac · Linux
Median: 3.2 hrsMean: 5.8 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 65.7%, Strategy 20.2%, Action 7.8%, Sci-fi 6.3%
Why You'll Like It: A high-quality sci-fi tower defense game that emphasizes strategic placement and managing limited resources under pressure.
- #9 Super Sanctum TD
91% matchVery Positive86% of 1,576 reviews2013
Dev: Coffee Stain StudiosPub: Coffee Stain Publishing
Windows · Mac
Median: 1.9 hrsMean: 33.6 hrs≥1hr: 75%
Super Sanctum TD is a retro-styled Tower Defense game that focuses on strategy, customization and replayability. Build advanced mazes and construct powerful towers to prevent alien hordes from reaching the Core!
Why similar: Tower Defense 36.8%, Isometric 16.5%, Aliens 14.4%, Sci-fi 8.5%, Strategy 6.6%
Why You'll Like It: A top-down, isometric tower defense game that shares the retro feel and strategic focus of 2112TD.
- #10 MarZ: Tactical Base Defense
91% matchMostly Positive78% of 890 reviews2019
Dev: Giant Grey
Windows
Median: 2.6 hrsMean: 5.5 hrs≥1hr: 71%
Build your defense base to fight back the undead hordes of Mars and secure the future of the red planet. MarZ is a game of strategy and tactical defense where you must carefully manage your crew and resources as you try to uncover the terrible secrets of the undead.
Why similar: Tower Defense 38.4%, Zombies 18%, Tactical 17.4%, Strategy 11.4%, Sci-fi 8.2%
Why You'll Like It: Focuses on managing defenses against waves of enemies on a hostile sci-fi planet with a strong emphasis on tactical placement.
- #11 Alien Shooter TD
90% matchVery Positive85% of 908 reviews2017
Dev: Sigma Team Inc.
Windows
Median: 3.8 hrsMean: 7.3 hrs≥1hr: 95%
Innovative Tower Defense inspired by legendary Alien Shooter series! The game was created in keeping with the best traditions of Sigma`s games, no concessions of any kind - everything is just like in real life!
Why similar: Tower Defense 31.2%, Aliens 16.2%, Isometric 15%, Survival 12.7%, Sci-fi 11.1%
Why You'll Like It: Focuses on the action-heavy, survival aspect of tower defense with a gritty sci-fi atmosphere.
- #12 Mindustry
88% matchOverwhelmingly Positive96% of 26,625 reviews2019
Dev: AnukenDev
Windows · Mac · Linux
Median: 4.9 hrsMean: 27.5 hrs≥1hr: 76%
An open-ended factory management game with RTS and tower defense elements.
Why similar: Tower Defense 60.9%, Strategy 15.4%, Survival 9.8%, PvE 7.4%, 2D 3.3%
Why You'll Like It: Combines deep tower defense mechanics with resource automation and base building in a gritty sci-fi setting.
- #13 Revenge of the Titans
89% matchVery Positive82% of 1,251 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 56.5%, Strategy 11.7%, Sci-fi 9.7%, Aliens 7.9%, Top-Down 4.5%
Why You'll Like It: An old-school sci-fi strategy game that features heavy tower defense elements and a distinct, charming art style.
- #14 Ancient Planet Tower Defense
89% matchVery Positive82% of 1,191 reviews2015
Dev: Moonlight Mouse
Windows · Mac
Median: 3.3 hrsMean: 7.5 hrs≥1hr: 92%
Ancient Planet is classic tower defense game. The stronghold of an ancient civilization has been invaded by hordes of alien raiders. Use powerful technologies of the Ancient and repel the attack of the enemy's armies!
Why similar: Tower Defense 73.6%, Isometric 14.2%, Strategy 12.2%
Why You'll Like It: Offers a classic, isometric tower defense experience with a focus on tactical building and enemy pathing.
- #15 Sanctum 2
86% matchVery Positive90% of 14,378 reviews2013
Dev: Coffee Stain StudiosPub: Coffee Stain Publishing
Windows · Mac · Linux
Median: 2.8 hrsMean: 6.7 hrs≥1hr: 86%
Sanctum 2 is the sequel to the world’s first Tower Defense/FPS hybrid game. Pick from four unique character classes and embark on a mission to protect the oxygen-producing Cores from hordes of deadly aliens who are threatened by their existence.
Why similar: Tower Defense 65.1%, Sci-fi 9.3%, Strategy 9.2%, Aliens 6.7%, Survival 4.8%
Why You'll Like It: Provides a more action-oriented sci-fi tower defense experience that still requires careful planning and strategic building.
- #16 Tower Dominion
84% matchVery Positive86% of 5,010 reviews2025
Dev: Parallel 45 Games
Windows
Median: 11.7 hrsMean: 21.8 hrs≥1hr: 89%
Build and design the terrain while defending your stronghold against alien invasion in this unique Roguelike tower defense. Choose from 30 heroes, survive enemy waves, and upgrade a variety of destructive towers to hold the line!
Why similar: Tower Defense 39.4%, Tactical 16.8%, Isometric 13.7%, Aliens 11.1%, Strategy 9.6%
Why You'll Like It: Combines base building and tower defense in a sci-fi setting with roguelike elements for added variety.
- #17 No Creeps Were Harmed TD
85% matchVery Positive89% of 485 reviews2024
Dev: MinMax Games Ltd.
Windows
Median: 2.9 hrsMean: 5.7 hrs≥1hr: 75%
Employ lethal turrets, traps, and gadgets to defend against an onslaught of evolving creeps! Step into a twisted, hyper 3D, mind bending realm. Upgrade and adapt your defenses. Become a master maze crafter. Collect bizarre artifacts. Rush creeps for lucrative rewards, and succumb to greed!
Why similar: Tower Defense 28.4%, Dystopian 13.3%, Aliens 12.6%, Sci-fi 10.1%, Survival 9.3%
Why You'll Like It: A modern sci-fi tower defense game that offers similar strategic depth and a clean, tactical interface.
- #18 Siege of Centauri
86% matchMixed66% of 449 reviews2019
Dev: Stardock Entertainment
Windows
Median: 42 minMean: 5.9 hrs≥1hr: 43%
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.
Why similar: Tower Defense 28.1%, Isometric 17.6%, Aliens 12.9%, Tactical 11.6%, PvE 10.5%
Why You'll Like It: A sci-fi tactical defense game focused on large-scale combat and managing massive waves of incoming threats.
- #19 Broken Universe - Tower Defense
83% matchVery Positive91% of 312 reviews2023
Dev: Jinthree Studio
Windows
Get ready to rethink all your defense strategies! Build barricades to stop monsters, or lure them into a maze and attack. A variety of stages that change each time depending on how you play them.
Why similar: Tower Defense 34.7%, Survival 15.3%, Space 15.3%, PvE 11.2%, Strategy 9.8%
Why You'll Like It: A 2D strategy game that emphasizes tactical placement and managing unique tower abilities.
- #20 Fieldrunners 2
84% matchVery Positive86% of 528 reviews2013
Dev: Subatomic Studios LLC
Windows
Median: 3.0 hrsMean: 16.5 hrs≥1hr: 70%
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 81.6%, Strategy 13.3%, Action 5.1%
Why You'll Like It: A classic, high-polish tower defense game with a sci-fi aesthetic that emphasizes maze-building and strategic tower selection.
- #21 League TD
82% matchVery Positive87% of 79 reviews2023
Dev: Wondarabyte
Windows
"League Tower Defense" is a strategy tower defense game that combines unique defense towers and various upgradeable components to unleash different attack effects. Come and build your perfect defense line.
Why similar: Tower Defense 36.5%, Old School 11.9%, Sci-fi 11.4%, Tactical 10.9%, Strategy 10.1%
Why You'll Like It: Features old-school tower defense mechanics with sci-fi elements and a focus on unit customization.
- #22 Last Hope - Tower Defense
82% matchVery Positive83% of 458 reviews2016
Dev: JE Software
Windows
Median: 3.5 hrsMean: 13.0 hrs≥1hr: 67%
Zombie Tower Defense: Join the ongoing war, in an open world, against the undead zombie horde. Choose between multiple powerful heroes all with unique epic gear and skills! With the wide variety of towers you can create your own perfect strategy.
Why similar: Tower Defense 54.9%, Zombies 25.1%, Top-Down 10.3%, Strategy 9.6%
Why You'll Like It: Provides a survival-focused tower defense experience that emphasizes holding your ground against persistent threats.
- #23 PolyCore Defense
81% matchVery Positive90% of 58 reviews2022
Dev: TorksGame
Windows
PolyCore Defense is a tower defense game where you have to raise your defenses in order to defend your core. Build unique turrets, upgrade them with special effects and use abilities to survive waves of enemies that are trying to destroy your core!
Why similar: Tower Defense 44.7%, Top-Down 12%, Strategy 11.5%, Tactical 10.5%, Survival 7.9%
Why You'll Like It: A tactical tower defense game that emphasizes difficult choices and strategic planning during intense waves.
- #24 Artisan TD
79% matchVery Positive87% of 2,400 reviews2024
Dev: 4rtisansPub: Unexpected
Windows
Median: 2.7 hrsMean: 4.9 hrs≥1hr: 74%
Artisan TD is a puzzle-oriented Tower Defense game where you must survive by building mazes.
Why similar: Tower Defense 48.3%, Tactical 20.7%, Strategy 13.2%, Top-Down 9.4%, Stylized 6%
Why You'll Like It: Focuses on the puzzle-like building aspects of tower defense, requiring precise placement to succeed.
- #25 Northend Tower Defense
79% matchMostly Positive74% of 1,417 reviews2024
Dev: Northend Games
Windows
Median: 1.4 hrsMean: 3.5 hrs≥1hr: 58%
Jump into a realtime strategy, action filled battlefield, deploy relentless soldiers, unlock powerful troops and vehicles, upgrade your army, decimate the enemy. If that's not enough, jump into a chaotic Zombie mode, with traps, fun upgrades, and a new gameplay!
Why similar: Tower Defense 51.1%, Tactical 23.4%, Strategy 13.5%, Stylized 7.1%, Action 4.9%
Why You'll Like It: A strategy-heavy tower defense game with war themes that requires careful resource management.
- #26 Survivor Challenge TD
78% matchVery Positive82% of 60 reviews2025
Dev: SQRT Games
Windows · Mac · Linux
Survivor Challenge TD - is a Tower Defense game where you manage a single tower and add upgrades to it. Buy abilities, enhance upgrades, and defeat the boss!
Why similar: Tower Defense 44.2%, Tactical 20.1%, PvE 10.6%, Strategy 10.5%, Stylized 8.7%
Why You'll Like It: Emphasizes the survival and combat aspects of the genre, forcing players to adapt to increasingly difficult waves.
- #27 M.A.C.E. Tower Defense
81% matchMostly Positive70% of 61 reviews2017
Dev: EntwicklerX
Windows
M.A.C.E. Tower Defense is a classic tower defense game with unique towers and enemies and an ingame shop system for getting better towers, upgrade existing towers and buy special items.
Why similar: Tower Defense 50.9%, Strategy 24.7%, Sci-fi 12.8%, Action 11.6%
Why You'll Like It: A straightforward, sci-fi tower defense game that focuses on classic mechanics and wave-based survival.
- #28 Kingdom Rush - Tower Defense
78% matchOverwhelmingly Positive97% of 16,522 reviews2014
Dev: Ironhide Game Studio
Windows · Mac · Linux
Median: 5.0 hrsMean: 16.3 hrs≥1hr: 86%
Get ready for an epic journey to defend your kingdom against hordes of orcs, trolls, evil wizards and other nasty fiends using a vast arsenal of towers and spells at your command!Fight on forests, mountains and wastelands, customizing your defensive strategy with different tower upgrades and specializations!
Why similar: Tower Defense 63.8%, Tactical 15.2%, Strategy 11.2%, 2D 3.9%, Action 3.3%
- #29 Radiant Defense
80% matchVery Positive83% of 148 reviews2014
Dev: Hexage
Windows
MILLIONS OF ALIENS WILL DIE!Radiant Defense is a tower defense game set in a vibrant universe invaded by countless alien hordes.Build your space fortress any way you wish, set up wide variety of weapons and traps and let the invasions begin!
Why similar: Tower Defense 42.8%, Space 18.2%, Strategy 12.6%, Aliens 10.4%, Sci-fi 6.6%
Why You'll Like It: A colorful, sci-fi tower defense game that provides significant tactical depth through its unique building system.
- #30 Kingdom Rush Origins - Tower Defense
76% matchOverwhelmingly Positive96% of 7,788 reviews2018
Dev: Ironhide Game Studio
Windows · Mac · Linux
Median: 8.4 hrsMean: 18.8 hrs≥1hr: 92%
Command your elven army and defend mystical lands from sea serpents, evil sorcerers, and wave after wave of gnoll tribesman, all with the help of brand-spankin’ new towers, heroes, and spells to fend off every last baddie.
Why similar: Tower Defense 52.1%, Tactical 18.9%, Strategy 11.5%, 2D 5.4%, Stylized 4.8%
- #31 Dome Keeper
74% matchVery Positive92% of 20,921 reviews2022
Dev: BippinbitsPub: Raw Fury
Windows · Mac · Linux
Median: 4.2 hrsMean: 11.2 hrs≥1hr: 87%
Defend against waves of alien monsters in this unique roguelike action miner. Dig for resources, collect useful gadgets, and upgrade equipment to increase odds of survival – just hurry back before your dome is destroyed!
Why similar: Tower Defense 24.8%, Post-apocalyptic 19.2%, Tactical 13.9%, Sci-fi 12.9%, Space 12.7%
- #32 Element TD 2 - Tower Defense
75% matchVery Positive90% of 3,196 reviews2021
Dev: Element Studios
Windows
Median: 3.2 hrsMean: 13.1 hrs≥1hr: 75%
Element TD 2 sees you combine powerful elements to create unique towers. Prove your defenses against challenging foes, and compete or cooperate with others to determine who has mastered the elements.
Why similar: Tower Defense 51.3%, Tactical 18.7%, PvE 15.8%, Strategy 12.1%, Singleplayer 2.1%
- #33 Zombo Buster Advance
77% matchVery Positive83% of 244 reviews2020
Dev: FIREBEAST
Windows · Mac
Median: 3.1 hrsMean: 9.3 hrs≥1hr: 67%
Zombo Buster Advance is a tower defense game taking place inside buildings with interchangeable elevators. Deploy, swap and shoot like a boss!
Why similar: Tower Defense 37.5%, Zombies 21.8%, Survival 12.3%, Strategy 11.2%, Tactical 10.4%
- #34 GemCraft - Chasing Shadows
76% matchVery Positive95% of 4,360 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 70.6%, Strategy 12.6%, Tactical 5.7%, Top-Down 5.5%, Action 2.3%
- #35 Alien Robot Monsters
77% matchVery Positive85% of 124 reviews2015
Dev: Kraftix Games
Windows · Mac · Linux
Median: 7.0 hrsMean: 11.9 hrs≥1hr: 95%
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 58.8%, Strategy 27.8%, Action 13.4%
- #36 Protolife
75% matchVery Positive86% of 469 reviews2018
Dev: Volcanic Giraffe
Windows · Mac
Median: 3.8 hrsMean: 7.7 hrs≥1hr: 74%
Protolife is an unique tower-based strategy game which gives you a direct control over the builder robot in a struggle against the hungry proto-life organism.
Why similar: Tower Defense 42%, Aliens 17%, Sci-fi 14.6%, Strategy 10.9%, Top-Down 9.1%
- #37 Legion TD 2 - Multiplayer Tower Defense
72% matchVery Positive86% of 15,004 reviews2021
Dev: AutoAttack Games
Windows · Mac
Median: 11.8 hrsMean: 42.8 hrs≥1hr: 89%
An infinitely replayable multiplayer and single-player tower defense. Defend against waves of enemies and destroy the enemy's king before they destroy yours. Legion TD 2 is a one-of-a-kind game of tactics, teamwork, and prediction. Party as 1-8 players.
Why similar: Tower Defense 49.8%, PvE 12.3%, Survival 12.1%, Sci-fi 11.5%, Strategy 11%
- #38 Let Them Come
74% matchVery Positive84% of 1,358 reviews2017
Dev: Tuatara GamesPub: Versus Evil
Windows · Mac
Median: 2.8 hrsMean: 3.7 hrs≥1hr: 83%
Let Them Come is a fast paced pixel art shoot ‘em up. Twitchy trigger fingers and focused battle tactics are the order of the day as wave after wave of alien-like creatures try to take you down.
Why similar: Tower Defense 35.4%, Aliens 21%, Survival 13.4%, Sci-fi 8.6%, Strategy 5.5%
- #39 TDS - Tower Defense Strategy
72% matchVery Positive81% of 363 reviews2025
Dev: Blockage
Windows · Mac · Linux
TOWER ▪ DEFENSE ▪ STRATEGY. Control Vessels. Utilize their uniquely deep set of towers. Create an everchanging defense. Play with friends. Protect your Basin at all costs. An absolute Tower Defense, Real-Time Strategy Hybrid
Why similar: Tower Defense 67.7%, PvE 20.2%, Strategy 8.5%, Singleplayer 3.7%
- #40 Towerful Defense: A Rogue TD
73% matchMostly Positive73% of 227 reviews2024
Dev: Mini Fun Games
Windows · Mac · Linux
Median: 2.2 hrsMean: 4.2 hrs≥1hr: 68%
A roguelike tower defense where you control a single tower to fight against hordes of aliens coming from all directions. Pick your tower, equip up to 4 skills, and choose from a variety of traits and unique effect items to craft powerful builds that lead you to victory.
Why similar: Tower Defense 48.5%, Survival 22.3%, Strategy 12%, Top-Down 9.3%, Action 4.1%
- #41 Towerful Defense: Prologue
71% matchVery Positive88% of 75 reviews2024
Dev: Mini Fun Games
Windows · Mac · Linux
A tower defense action roguelike where you control a single tower to fight against hordes of aliens coming from all directions. Pick your tower, equip up to 4 skills, and choose from a variety of traits and items to craft powerful builds that lead you to victory.
Why similar: Tower Defense 36.8%, Aliens 17.5%, Survival 13.8%, Strategy 10.2%, Top-Down 10%
- #42 IDUN - Frontline Survival
70% matchMostly Positive79% of 690 reviews2025
Dev: IDUN InteractivePub: Surefire.Games
Windows · Mac · Linux
Median: 5.1 hrsMean: 10.9 hrs≥1hr: 76%
A defense RTS where you can move turrets at will. Extract resources, upgrade technology, and defend against enemy swarms in a gripping space campaign. Hold the line, set up your turrets, and brace for screen-filling hordes!
Why similar: Tower Defense 31.8%, Survival 15.6%, Space 14.4%, Sci-fi 12.8%, Top-Down 10.7%
- #43 Spoids
73% matchMostly Positive72% of 115 reviews2017
Dev: AirWave GamesPub: BindleBot
Windows
Median: 3.2 hrsMean: 3.6 hrs≥1hr: 77%
Spoids is a challenging throwback to the original brand of tower defense games. Command the Remote Defense Space Station and respond to distress calls of those who are being attacked by the invaders. Travel from planet to planet using your powerful arsenal to hold back the Spoids.
Why similar: Tower Defense 48.3%, Strategy 23.7%, Sci-fi 10.5%, Old School 8.9%, Action 8.7%
- #44 Sentinel 3: Homeworld
73% matchMostly Positive80% of 149 reviews2014
Dev: Origin8Pub: Strategy First
Windows
Median: 4.3 hrsMean: 17.8 hrs≥1hr: 74%
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 79.1%, Strategy 13.9%, Sci-fi 7%
- #45 Tower Tactics: Liberation
70% matchVery Positive88% of 1,237 reviews2023
Dev: asraworks
Windows
Median: 6.2 hrsMean: 17.0 hrs≥1hr: 88%
We fused deck-building roguelikes and tower defenses in a way never seen before - deploy your towers, collect valuable trinkets and cast powerful spells to defend yourself against the Salkoth!
Why similar: Tower Defense 40.9%, Space 11.6%, Sci-fi 11.5%, Tactical 11.3%, Top-Down 9.7%
- #46 Dungeon Warfare
71% matchOverwhelmingly Positive96% of 2,000 reviews2015
Dev: Valsar
Windows · Mac · Linux
Median: 3.7 hrsMean: 11.1 hrs≥1hr: 90%
Dungeon Warfare is a challenging tower defense strategy game where you become a dungeon lord to defend your dungeons with deadliest of traps and insidious contraptions against greedy adventurers and wanna-be heroes.
Why similar: Tower Defense 39.3%, Tactical 16.7%, Top-Down 12.3%, Strategy 10.3%, PvE 8.6%
- #47 Space Cycle
69% 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 45.9%, Space 21.6%, Sci-fi 17.2%, Strategy 12.3%, Singleplayer 3.1%
- #48 Rock 'N' Roll Defense
70% matchVery Positive87% of 3,784 reviews2016
Dev: NukGames
Windows
Median: 3.7 hrsMean: 6.5 hrs≥1hr: 93%
Rocked by an explosive soundtrack, choose your band, place your equipments and defend the Rock 'N' Roll from everyone and everything who try to pull it down, on a totally hardcore tower defense!
Why similar: Tower Defense 76.1%, Strategy 9.7%, Tactical 4.4%, Action 3.6%, Old School 2.4%
- #49 Unstoppable Gorg
71% matchMostly Positive79% of 307 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 62.7%, Strategy 11%, Aliens 9%, Sci-fi 8.7%, Space 5.2%
- #50 Anomaly: Warzone Earth
69% matchVery Positive87% of 4,676 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 42.4%, Strategy 23.3%, Sci-fi 13.5%, Aliens 8.4%, Action 5.5%
- #51 Monsters are Coming!
66% matchVery Positive80% of 2,489 reviews2025
Dev: LudogramPub: Raw Fury
Windows
Median: 3.4 hrsMean: 7.0 hrs≥1hr: 81%
Beware, Monsters are Coming! In this Tower-Survivor rogue-lite, you protect an ever-moving city from unrelenting hordes. Gather resources, fortify defences, and survive for as long as you can. Will you reach the Ark?
Why similar: Tower Defense 33.8%, Isometric 21.2%, Survival 16.2%, Top-Down 12.9%, Strategy 8.5%
- #52 Ultimate Zombie Defense
68% matchVery Positive85% of 4,703 reviews2020
Dev: Terror Dog Studio
Windows · Mac
Median: 1.9 hrsMean: 8.1 hrs≥1hr: 66%
Team up or face it alone in this top down zombie slaying defense adventure! Featuring up to 4 player online co-op, cleanse the infected wave by wave and upgrade your base with traps & defenses to build the Ultimate Zombie Defense. Can YOU stop them?
Why similar: Tower Defense 34%, Zombies 29.8%, Survival 13.8%, Action 7.8%, Strategy 7.2%
- #53 Neural Shock
67% matchVery Positive95% of 66 reviews2024
Dev: Hardwired Studios
Windows · Mac · Linux
Control your Hero to aid your Turrets and Traps in battle in this grim, dark Tower Defense & Action RPG with a scifi-grindhouse aesthetic. Create deadly weapon barrages and fuse together Bleed, Burn, Shock, Freeze, Stun and many more elements to annihilate your enemies.
Why similar: Tower Defense 42.7%, Dystopian 17.5%, Strategy 13%, Sci-fi 11.3%, Top-Down 5.4%
- #54 SENTRY
67% matchVery Positive82% of 882 reviews2024
Dev: Fireblade Software
Windows
Median: 2.8 hrsMean: 5.3 hrs≥1hr: 73%
SENTRY is an action-defense first person shooter where you defend your spaceship against invading aliens. Plot an escape route through hostile space and battle the enemy across your vessel with the support of traps, turrets and environmental destruction.
Why similar: Tower Defense 31.2%, Survival 13.8%, Aliens 13.8%, Sci-fi 11.9%, Space 10.8%
- #55 Decision: Red Daze
68% matchMostly Positive74% of 880 reviews2022
Dev: FlyAnvilPub: Nordcurrent Labs
Windows
Median: 3.2 hrsMean: 10.4 hrs≥1hr: 72%
Decision: Red Daze is an action RPG with a unique mix of survival and tower defense mechanics. Explore an apocalyptic wasteland, build a safe haven, and lead your team of specialists in a hopeless world, searching for a cure for the infectious disease that turns people into monsters.
Why similar: Tower Defense 20.3%, Zombies 16.2%, Survival 13.5%, Isometric 11%, Post-apocalyptic 10%
- #56 Kingdom Rush Vengeance - Tower Defense
66% matchVery Positive94% of 10,592 reviews2020
Dev: Ironhide Game Studio
Windows · Mac
Median: 8.7 hrsMean: 18.4 hrs≥1hr: 89%
It's payback time! Lead your mighty dark army and make the Kingdom tremble with every step. Build powerful towers, choose your arsenal for destruction, and find the deadliest combination - train legendary heroes and lead them to victory!
Why similar: Tower Defense 66.2%, Strategy 16.2%, 2D 7.4%, Action 5.5%, Singleplayer 4.8%
- #57 SHOOPER NOVA
66% matchVery Positive85% of 631 reviews2025
Dev: JamesikaPub: Gamersky Games
Windows
Median: 3.8 hrsMean: 6.1 hrs≥1hr: 78%
Craft Your Ultimate Circular Fortress! Dive into SHOOPER NOVA, where you choose props and components to build a unique fortress. Unlock combos to shape your strategy and battle style. Become an unstoppable barrage machine and obliterate waves of enemies from all directions!
Why similar: Tower Defense 40.5%, Strategy 14%, Sci-fi 9.8%, Top-Down 9.4%, Space 7.9%
- #58 Everwarder
66% matchVery Positive88% of 81 reviews2025
Dev: qLatePub: indie.io
Windows · Mac · Linux
Everwarder is a refreshing take on the tower defense genre, blending roguelite mechanics with a time-based survival concept. Fight against the encroaching darkness and fend off emerging enemies. Collect artifacts, buy upgrades, discover ancient structures, unlock new units and more!
Why similar: Tower Defense 33.8%, Survival 16.7%, Tactical 12.9%, Sci-fi 10.8%, Top-Down 10.6%
- #59 Zombie Defense
67% matchVery Positive84% of 2,168 reviews2016
Dev: Home Net Games
Windows · Mac · Linux
Median: 1.6 hrsMean: 6.7 hrs≥1hr: 58%
A modern hybrid of the classic RTS and modern Tower Defense. Recruit soldiers, place them on slots and let them shoot incoming waves of zombies by their own. Order supplies, throw grenades, order airstrikes and many more... Perfect mix of strategy, tactics and micromanagement.
Why similar: Tower Defense 38.8%, Zombies 32.5%, Survival 13.7%, Strategy 7.9%, Action 3.2%