- #1 X-Morph: Defense
97% matchVery Positive92% of 4,073 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 48.6%, Strategy 10.5%, Destruction 10.5%, Top-Down Shooter 7.1%, Sci-fi 7%
Why You'll Like It: Blends top-down shooter action with strategic tower placement in a sci-fi setting.
- #2 Outpost: Infinity Siege
96% matchMixed66% of 13,528 reviews2024
Dev: Team RangerPub: Lightning Games
Windows
Median: 16.2 hrsMean: 41.5 hrs≥1hr: 91%
Command Mobile Outpost and take XEN Firearm to venture deep into the Signet surveillance off-limit area. Collect unique Weapon Units. Amp up the firepower of the Outpost that fights with you. This is an FTD game - FPS, Tower Defense, Base Building and much more all at the same time.
Why similar: Tower Defense 30.7%, Robots 16.2%, Base Building 15.9%, RTS 11.1%, Automation 8.8%
Why You'll Like It: Features an intense mix of FPS combat and complex base-building against massive waves of enemies.
- #3 Sanctum 2
96% matchVery Positive90% of 14,356 reviews2013
Dev: Coffee Stain StudiosPub: Coffee Stain Publishing
Windows · Mac · Linux
Median: 2.8 hrsMean: 6.7 hrs≥1hr: 85%
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 75.7%, Strategy 10.3%, Sci-fi 5.9%, Action 3.3%, Futuristic 2.5%
Why You'll Like It: Combines first-person shooter action with tower defense mechanics, perfectly mirroring the active combat style of Taur.
- #4 Warpips
95% matchVery Positive87% of 5,047 reviews2022
Dev: Skirmish Mode GamesPub: Daedalic Entertainment
Windows
Median: 2.1 hrsMean: 8.3 hrs≥1hr: 66%
Warpips is the ultimate quick to learn but amazingly deep tug-of-war strategy game. Deploy the right composition of soldiers, tanks, helicopters and planes in this tight, streamlined strategy-focused war game. Compose the best army, research the right tech; overwhelm your enemy!
Why similar: Tower Defense 37.8%, RTS 16%, Base Building 11.6%, Strategy 10.3%, War 8.5%
Why You'll Like It: Provides fast-paced, action-strategy gameplay with a focus on tactical unit deployment and war.
- #5 Mechs V Kaijus - Tower Defense
94% matchVery Positive84% of 529 reviews2022
Dev: Doble Punch Games
Windows
Median: 6.8 hrsMean: 13.2 hrs≥1hr: 83%
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 77.1%, Strategy 9.1%, Base Building 5.6%, Tactical 2.6%, Indie 2.6%
Why You'll Like It: Features giant mechs and strategic defense against massive enemies, matching the scale of Taur.
- #6 The Riftbreaker
93% matchVery Positive90% of 23,181 reviews2021
Dev: EXOR Studios
Windows
Median: 8.0 hrsMean: 22.6 hrs≥1hr: 88%
The Riftbreaker is a solo or Co-op base-building, survival game with Action-RPG elements for up to 4 players. Hack & slash countless hordes of enemies. Build up your base, craft powerful weapons and research new inventions to survive.
Why similar: Tower Defense 44.7%, Base Building 29.3%, RTS 15.4%, Strategy 9.2%, Singleplayer 1.4%
Why You'll Like It: Focuses on building a base and defending it with a powerful mech, offering a similar sense of player-driven power.
- #7 REDCON
94% matchVery Positive85% of 807 reviews2016
Dev: Hexage
Windows
Median: 4.0 hrsMean: 9.8 hrs≥1hr: 71%
Command your own fortress in FTL-like real-time battles! Crush the enemy fortress with unrelenting bombardment or seize it with carefully executed invasion.
Why similar: Tower Defense 46.5%, Strategy 26.3%, Base Building 20.8%, Indie 4.9%, Singleplayer 1.5%
Why You'll Like It: Features strategic artillery combat where you manage a fortress and target enemy structures in real-time.
- #8 Infested Planet
92% matchVery Positive94% of 3,014 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 42.9%, Strategy 17.5%, RTS 16.6%, Sci-fi 6.3%, Top-Down 4.6%
Why You'll Like It: Combines RTS elements with action-heavy base defense against massive alien swarms.
- #9 MarZ: Tactical Base Defense
91% matchMostly Positive78% of 885 reviews2019
Dev: Giant Grey
Windows
Median: 2.5 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 41%, RTS 14.1%, Base Building 12.8%, Strategy 11.7%, Tactical 7.2%
Why You'll Like It: Focuses on building and defending a Martian colony against alien threats with a strong sci-fi theme.
- #10 Orcs Must Die! 2
91% matchVery Positive92% of 19,505 reviews2012
Dev: Robot Entertainment
Windows
Median: 5.5 hrsMean: 11.9 hrs≥1hr: 91%
You’ve tossed, burned and sliced them by the thousands – now orcs must die more than ever before! Grab a friend and slay orcs in untold numbers in this sequel to the 2011 AIAS Strategy Game of the Year from Robot Entertainment.
Why similar: Tower Defense 80.6%, Strategy 11.7%, Action 4.9%, Indie 1.9%, Singleplayer 1%
Why You'll Like It: A classic action-oriented tower defense game where player skill and direct combat are just as important as trap placement.
- #11 Mindustry
90% matchOverwhelmingly Positive96% of 25,660 reviews2019
Dev: AnukenDev
Windows · Mac · Linux
Median: 4.9 hrsMean: 26.9 hrs≥1hr: 76%
An open-ended factory management game with RTS and tower defense elements.
Why similar: Tower Defense 42.8%, Base Building 24.1%, Automation 13%, Strategy 10.3%, RTS 7.6%
Why You'll Like It: Offers a complex blend of resource management, automation, and tower defense against persistent threats.
- #12 Defense Grid: The Awakening
89% 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 77.8%, Strategy 11%, Sci-fi 6.4%, Futuristic 1.9%, Indie 1.8%
Why You'll Like It: A quintessential sci-fi tower defense game that emphasizes strategic pathing and turret placement.
- #13 Dungeon Defenders
89% matchVery Positive93% of 18,745 reviews2011
Dev: Chromatic Games
Windows
Median: 9.2 hrsMean: 42.0 hrs≥1hr: 89%
Create a hero from one of four classes to save Etheria in this 4-player coop Tower Defense Action-RPG. Includes Steam exclusive Portal gun & TF2 familiars!
Why similar: Tower Defense 72.8%, Strategy 13.7%, Tactical 10.7%, Singleplayer 2.8%
Why You'll Like It: Integrates RPG elements and action-heavy combat into a traditional tower defense framework.
- #14 Protolife
88% matchVery Positive86% of 465 reviews2018
Dev: Volcanic Giraffe
Windows · Mac
Median: 3.2 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 39.6%, Base Building 19%, RTS 16.4%, Strategy 9.9%, Sci-fi 7.5%
Why You'll Like It: Focuses on strategic base defense and expansion in a hostile sci-fi environment.
- #15 Anomaly: Warzone Earth
87% 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 48.1%, Strategy 25.3%, Sci-fi 8.2%, RTS 7.3%, Action 4.5%
Why You'll Like It: Reverses the tower defense genre by putting you in control of the attacking force, offering a unique tactical perspective.
- #16 Axon TD: Uprising - Tower Defense
85% matchVery Positive87% of 722 reviews2024
Dev: Element Studios
Windows
Median: 3.6 hrsMean: 9.8 hrs≥1hr: 75%
Axon TD lets you expand the map boundaries themselves. A huge arsenal of towers and a wide variety of enemies clash in a battlefield that grows to your whims. Engage in single, cooperative, and roguelite gameplay.
Why similar: Tower Defense 39.2%, RTS 13.8%, Real Time Tactics 12.7%, Strategy 9.4%, Robots 7.3%
Why You'll Like It: A modern, tactical tower defense game with roguelite elements and deep strategic choices.
- #17 Space Run
86% 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 67.6%, Strategy 14.1%, Space 8.4%, Sci-fi 6.2%, Indie 2.3%
Why You'll Like It: A unique sci-fi game where you build turrets on a moving spaceship to defend it from incoming threats.
- #18 Revenge of the Titans
86% 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 67.8%, Strategy 13.5%, Sci-fi 6.3%, RTS 4%, Indie 3%
Why You'll Like It: A classic sci-fi tower defense game that includes base-building and research elements.
- #19 Tower Dominion
82% matchVery Positive86% of 4,827 reviews2025
Dev: Parallel 45 Games
Windows
Median: 11.7 hrsMean: 21.5 hrs≥1hr: 90%
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 41.4%, Base Building 17.9%, RTS 13.9%, Strategy 9.8%, Tactical 6.9%
Why You'll Like It: A roguelike tower defense game with base-building elements and strategic progression.
- #20 Colony Siege
84% matchVery Positive93% of 257 reviews2020
Dev: Finifugal Games
Windows
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.
Why similar: Tower Defense 41.5%, Strategy 29%, RTS 12.7%, Base Building 8.7%, Sci-fi 7.1%
Why You'll Like It: Combines sci-fi base building with intense tower defense combat and strategic upgrades.
- #21 2112TD: Tower Defense Survival
83% matchVery Positive88% of 428 reviews2023
Dev: Refinery Games
Windows
Get ready for the ULTIMATE tower defense onslaught. Build, deploy, research and upgrade your defenses in this epic, old school RTS inspired sci-fi adventure.
Why similar: Tower Defense 49.9%, Strategy 12.9%, Sci-fi 10.8%, Tactical 9%, Space 6.1%
Why You'll Like It: A sci-fi tower defense game with a focus on tactical survival and unit management.
- #22 Siege of Centauri
84% matchMixed66% of 448 reviews2019
Dev: Stardock Entertainment
Windows
Median: 42 minMean: 6.0 hrs≥1hr: 44%
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 35.1%, Base Building 15.6%, Real Time Tactics 11.9%, Strategy 8.7%, Robots 8.5%
Why You'll Like It: A tactical tower defense game set in a sci-fi universe with a focus on massive enemy waves.
- #23 Minimalist Tower Defense
80% matchVery Positive95% of 1,706 reviews2024
Dev: Happy213
Windows
Median: 2.3 hrsMean: 7.2 hrs≥1hr: 73%
Collect resources and establish a defense line before dark And then Facing countless enemies
Why similar: Tower Defense 46%, Base Building 16.2%, Real Time Tactics 13.6%, Strategy 11.3%, Minimalist 5.6%
Why You'll Like It: A tactical tower defense game with a clean, 2D aesthetic and focused gameplay.
- #24 No Creeps Were Harmed TD
79% matchVery Positive89% of 482 reviews2024
Dev: MinMax Games Ltd.
Windows
Median: 2.8 hrsMean: 5.5 hrs≥1hr: 74%
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 46%, Strategy 10.9%, Automation 10.3%, Real Time Tactics 9.2%, Sci-fi 8.8%
Why You'll Like It: A 3D sci-fi tower defense game with a focus on strategic placement and environmental interaction.
- #25 Anomaly Defenders
82% 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 67.2%, Strategy 20%, Action 5.8%, Indie 3.8%, Sci-fi 3.3%
Why You'll Like It: The tower defense iteration of the Anomaly series, focusing on base protection and strategic turret placement.
- #26 Armed to the Gears
81% matchMixed63% of 212 reviews2020
Dev: Deonn Games
Windows
Median: 3.3 hrsMean: 3.8 hrs≥1hr: 94%
Control a fully armed Mech and fight through cyberpunk cities, military bases and industrial ruins. Capture and defend territories, build turrets and structures, and wage war against powerful enemies!
Why similar: Tower Defense 36.3%, RTS 15.5%, Base Building 13.9%, Top-Down Shooter 9.5%, Robots 7.5%
Why You'll Like It: A top-down shooter that integrates tower defense mechanics and base protection.
- #27 Iron Harvest
78% matchMostly Positive73% of 15,723 reviews2020
Dev: KING ArtPub: Prime Matter
Windows
Median: 3.2 hrsMean: 12.0 hrs≥1hr: 75%
A classic real-time strategy game with an epic single player campaign, multiplayer & coop, set in the alternate reality of 1920+
Why similar: RTS 31.9%, Base Building 28.8%, Strategy 18.1%, War 12%, Sci-fi 5.4%
Why You'll Like It: Features tactical combat with mechs in a diesel-punk setting that emphasizes strategic positioning.
- #28 Thronefall
74% matchOverwhelmingly Positive96% of 22,563 reviews2024
Dev: GrizzlyGamesPub: Mythwright
Windows · Mac
Median: 3.9 hrsMean: 8.4 hrs≥1hr: 83%
A minimalist game about building and defending your little kingdom.
Why similar: Tower Defense 57.5%, Base Building 14.9%, Strategy 14.4%, Minimalist 7.8%, Action 3.5%
- #29 IRON GUARD
77% matchVery Positive95% of 148 reviews2021
Dev: Xlab Digital
Windows
Median: 2.3 hrsMean: 4.9 hrs≥1hr: 76%
A sci-fi roomscale VR Tower Defense game. Strategize to destroy waves of rogue robots and assist the powerful turrets with a handheld drone. Build and collect resources and help evacuate your crew from the alien planet.
Why similar: Tower Defense 29.9%, RTS 12.6%, Robots 9.9%, Real Time Tactics 8.5%, Strategy 7.9%
- #30 IDUN - Frontline Survival
76% matchMostly Positive79% of 671 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 33.6%, Base Building 16.5%, RTS 14%, Strategy 8.8%, Sci-fi 7.3%
- #31 Alien Robot Monsters
78% 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 57.7%, Strategy 26.3%, Action 9.6%, Indie 6.4%
Why You'll Like It: A sci-fi tower defense game with action-heavy gameplay and classic strategic mechanics.
- #32 Rush for Glory
79% 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%, Strategy 21%, Action 6%
Why You'll Like It: An action-oriented tower defense game with a focus on defense strategy and turret upgrades.
- #33 Bee Island
75% matchVery Positive86% of 1,584 reviews2023
Dev: Lemma Arts
Windows
Median: 2.2 hrsMean: 3.5 hrs≥1hr: 72%
Take control of the hive and protect it from enemies. Build factories and defence, research technologies and, if necessary, use nuclear weapons, but do not let the enemies harm the queen!
Why similar: Tower Defense 40.7%, Base Building 16.4%, Strategy 9.3%, Minimalist 9.2%, Sci-fi 8.2%
- #34 DG2: Defense Grid 2
75% matchVery Positive86% of 3,339 reviews2014
Dev: Hidden Path Entertainment
Windows
Median: 6.0 hrsMean: 11.4 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 31.2%, Base Building 14.9%, RTS 12.5%, Real Time Tactics 9.7%, Strategy 8.3%
- #35 SENTRY
73% matchVery Positive83% of 853 reviews2024
Dev: Fireblade Software
Windows
Median: 2.7 hrsMean: 5.2 hrs≥1hr: 70%
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 59.8%, Strategy 15.6%, Sci-fi 12.3%, Space 6.8%, Action 4.6%
- #36 Molten Armor
77% matchMixed62% of 60 reviews2017
Dev: Brutal Muse
Windows
Molten Armor is an action tower defense game with a non-linear story in sci-fi setting! Command defenses and stop hordes of enemies! Fight on land, sea and in the skies!Decisions taken in the heat of battle will change the course of the war.
Why similar: Tower Defense 36.6%, RTS 14.9%, Real Time Tactics 10.6%, Strategy 10.3%, Sci-fi 6.7%
- #37 Unstoppable Gorg
76% 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 74.6%, Strategy 12.6%, Sci-fi 5.6%, Action 2.9%, Indie 2.3%
- #38 Northend Tower Defense
72% matchMostly Positive75% of 1,398 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 40.6%, Base Building 14.8%, Real Time Tactics 12.3%, Strategy 10.4%, War 9.2%
- #39 CARNAGE OFFERING Tower Defense
71% matchVery Positive90% of 306 reviews2023
Dev: FuturtechPub: Nova's Army
Windows
The replicator robots are back! It's 2528. The machines are increasingly infecting the planets with genetically modified monsters. Challenge them and try to stop the onslaught. Upgrade buildings and heroes, mine resources, discover technology and fight to save humanity!
Why similar: Tower Defense 60.6%, RTS 21.7%, Strategy 15.2%, Action 1.5%, Indie 1%
- #40 Spoids
74% 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 54.3%, Strategy 25.6%, Action 7.1%, Indie 6.6%, Sci-fi 6.4%
- #41 Executive Assault 2
70% matchVery Positive83% of 1,726 reviews2023
Dev: Hesketh Studios Ltd
Windows · Mac
Median: 4.0 hrsMean: 8.4 hrs≥1hr: 76%
The RTS/FPS phenomenon has moved into space! Build your base on an asteroid, command fleets of starships for epic battles, pilot fighters, mine and trade resources, assemble robots to defend or assault other stations. Take sole command or share the glory as you fight for control of the quadrant.
Why similar: RTS 22.7%, Base Building 22%, Strategy 12.2%, Robots 9.5%, Real Time Tactics 8.1%
- #42 Sentinel 3: Homeworld
73% 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 80%, Strategy 13.6%, Sci-fi 3.8%, Indie 2.7%
- #43 Creeper World 4
69% matchVery Positive95% of 4,620 reviews2020
Dev: Knuckle Cracker
Windows
Median: 12.2 hrsMean: 29.4 hrs≥1hr: 88%
The unstoppable fluid enemy has returned and destroyed every world in its path! Defend against Creeper as it floods across the 3D terrain in this real time strategy game where the enemy is a fluid.
Why similar: Tower Defense 35.3%, RTS 13.9%, Real Time Tactics 11.7%, Strategy 8.4%, War 7.6%
- #44 Harvest: Massive Encounter
73% 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 67.1%, Strategy 20.8%, Sci-fi 6.2%, Indie 4.9%, Singleplayer 1%
- #45 Byte Lynx
69% matchVery Positive98% of 88 reviews2022
Dev: Artful Games
Windows
Byte Lynx is a fast-paced RTS with no units. Build defenses, dismantle your enemy, and steal their buildings in this deeply tactical building combat-based strategy game. Expand your arsenal across a series of diverse levels!
Why similar: Tower Defense 27.5%, Base Building 16.8%, RTS 13.5%, Strategy 8.2%, Real Time Tactics 7.8%
- #46 Stellar Initiative
69% matchMostly Positive77% of 390 reviews2024
Dev: Five Head Games
Windows
Median: 1.7 hrsMean: 6.6 hrs≥1hr: 66%
Stellar Initiative is a roguelike tower defense game where you land on the planet and use your orbit ship to deliver buildings and support you with fire. Complete missions, install new upgrades, discover powerful artifacts, and find the best strategy!
Why similar: Tower Defense 53.5%, Base Building 18.8%, Strategy 12.9%, Sci-fi 10.3%, Space 3.9%
- #47 Space Cycle
67% 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 59%, Strategy 15.2%, Sci-fi 12%, Space 9.1%, Indie 2.9%
- #48 Artificial Defense
71% matchVery Positive82% of 210 reviews2016
Dev: Thiemo Bolder, ONEMANGAMES
Windows
Median: 3.5 hrsMean: 4.9 hrs≥1hr: 95%
Artificial Defense is a one man made, real time strategy game combining orbital shooter and tower defense components within an electrifying, virtual reality setting. You are the machine, a mighty computer-system defending its servers against swarms of intruding creeps.
Why similar: Tower Defense 45.6%, Strategy 34.1%, Action 11.3%, Indie 9%
- #49 Sentinel 4: Dark Star
71% matchMostly Positive79% of 63 reviews2015
Dev: Origin8 Technologies Ltd
Windows
Median: 4.1 hrsMean: 4.6 hrs≥1hr: 96%
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.
Why similar: Tower Defense 48.8%, Strategy 28.9%, Sci-fi 14.9%, Indie 7.4%
- #50 Project Astra Dominium
68% matchVery Positive90% of 88 reviews2024
Dev: Snob Entertainment UG
Windows · Mac · Linux
Project Astra Dominium is a Tower Defense game with Basebuilding and Automation elements. Build up your base to become a supply hub for Earth's desperately needed materials, gather resources while defending against an unknown alien threat and improve your tower's and AI capabilities.
Why similar: Tower Defense 38.3%, Base Building 18.7%, Automation 11.9%, Strategy 8.7%, Sci-fi 6.4%
- #51 Planetary Annihilation: TITANS
68% matchVery Positive85% of 14,430 reviews2015
Dev: Planetary Annihilation Inc
Windows · Mac · Linux
Median: 3.9 hrsMean: 17.4 hrs≥1hr: 73%
Wage war across entire solar systems with massive armies at your command. Annihilate enemy forces with world-shattering TITAN-class units, and demolish planets with massive super weapons!
Why similar: RTS 19.3%, Base Building 15.9%, Real Time Tactics 11.2%, Strategy 11.1%, Robots 10.5%
- #52 Anomaly Korea
70% matchMostly Positive78% of 792 reviews2013
Dev: 11 bit studios
Windows · Mac · Linux
Median: 2.8 hrsMean: 5.4 hrs≥1hr: 79%
Exclusively brought to Steam for PC, Mac and Linux in Anomaly Bundle, Anomaly Korea is an expansion campaign to Anomaly Warzone Earth. The alien robots are back and this time they’ve got Korea in their sights. It’s your job to lead a squad into fierce fire-fights and fend off the alien invasion.
Why similar: Tower Defense 46.1%, Strategy 32.1%, Action 9.3%, Sci-fi 8.2%, Indie 2.3%
- #53 M.A.C.E. Tower Defense
70% 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 53.1%, Strategy 24.9%, Action 8.8%, Sci-fi 7.2%, Indie 6%
- #54 Orcdom
66% matchVery Positive89% of 66 reviews2025
Dev: GAGAPub: OKJOY
Windows
Orcdom is a minimalist tower defense game with full freedom in tower placement. Defend your crystal from waves of orcs attacking from all directions. Plan your layout, time your spells, and unlock new strategy modes in this fast-paced tactical challenge!
Why similar: Tower Defense 41.8%, Base Building 15.8%, Real Time Tactics 13.4%, RTS 11.5%, Strategy 10.6%
- #55 Defense Technica
72% 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 83.9%, Strategy 13.3%, Indie 2.8%
- #56 Dome Keeper
64% matchVery Positive92% of 19,233 reviews2022
Dev: BippinbitsPub: Raw Fury
Windows · Mac · Linux
Median: 4.1 hrsMean: 10.8 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 51.4%, Sci-fi 14.5%, Tactical 11.1%, Space 8.6%, Action 7.4%
- #57 The White Laboratory
68% matchMostly Positive78% of 361 reviews2019
Dev: Laboratory Systems
Windows
The White Laboratory is a sandbox style physics-based tower defense and RTS game in which you modularly build and command robotic structures. Use them to defend against or conquer other disobedient mechanical blocks on a facility floating in the atmosphere of a remote gas planet.
Why similar: Tower Defense 50.6%, Strategy 23.6%, RTS 12.7%, Sci-fi 6.8%, Indie 6.2%
- #58 Nordhold
63% matchVery Positive88% of 3,019 reviews2025
Dev: StunForgePub: HypeTrain Digital
Windows · Mac · Linux
Median: 6.9 hrsMean: 12.5 hrs≥1hr: 85%
Enemies are coming! Every decision matters: build your city, grow the economy, and prepare for enemy waves. Strengthen your defenses, adapt your strategy, and unleash your hero’s full potential. This unique Tower Defense will test your skills – are you worthy to claim a place at Valhalla?
Why similar: Tower Defense 42.3%, Base Building 18.4%, Strategy 11.4%, RTS 9.7%, War 5.7%
- #59 SHOOPER NOVA
64% matchVery Positive85% of 616 reviews2025
Dev: JamesikaPub: Gamersky Games
Windows
Median: 3.7 hrsMean: 5.8 hrs≥1hr: 77%
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 51.4%, Strategy 17.3%, Sci-fi 6.8%, Top-Down Shooter 5.3%, Action 5.1%