- #1 Starship Troopers: Terran Command
97% matchVery Positive87% of 12,051 reviews2022
Dev: The ArtistocratsPub: Slitherine Ltd.
Windows
Median: 3.3 hrsMean: 10.3 hrs≥1hr: 83%
Lead the Mobile Infantry in this RTS game set in the Starship Troopers film universe. Balance your army composition with a diverse set of unit types, overcome line-of-sight and line-of-fire challenges through tactical positioning, and use special abilities to smash the Arachnid hordes!
Why similar: RTS 42.2%, Strategy 25.4%, Tower Defense 9.7%, Tactical 8%, Sci-fi 7.1%
Why You'll Like It: Captures the exact thematic and mechanical feel of commanding squads against an overwhelming alien swarm.
- #2 Aliens: Dark Descent
96% matchVery Positive88% of 18,947 reviews2023
Dev: Tindalos InteractivePub: Focus Entertainment
Windows
Median: 4.3 hrsMean: 15.3 hrs≥1hr: 87%
Drop into the gripping journey of Aliens: Dark Descent, a squad-based, single-player action game in the iconic Alien franchise. Lead your soldiers in real-time to stop a new and terrifying kind of Xenomorph outbreak on Planet Lethe.
Why similar: RTS 32.3%, Strategy 20.8%, Tactical 11.6%, Aliens 10.1%, Sci-fi 8.6%
Why You'll Like It: Offers intense, top-down squad tactics where managing resources and positioning against alien threats is paramount.
- #3 The Riftbreaker
96% matchVery Positive90% of 24,991 reviews2021
Dev: EXOR Studios
Windows
Median: 6.3 hrsMean: 20.2 hrs≥1hr: 87%
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 47.8%, RTS 33.9%, Strategy 15.4%, Singleplayer 2.9%
Why You'll Like It: Combines base building, real-time strategy, and action against massive alien hordes in a way that perfectly mirrors the core loop of Infested Planet.
- #4 Iron Marines
95% matchMostly Positive78% of 1,888 reviews2019
Dev: Ironhide Game Studio
Windows · Mac · Linux
Median: 5.2 hrsMean: 11.4 hrs≥1hr: 86%
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: RTS 42.4%, Strategy 18.9%, Aliens 13.1%, Sci-fi 11.6%, Action 5.9%
Why You'll Like It: A polished RTS that blends squad-based hero control with tower defense mechanics.
- #5 They Are Billions
94% matchVery Positive85% of 51,491 reviews2019
Dev: Numantian Games
Windows
Median: 14.3 hrsMean: 56.8 hrs≥1hr: 91%
They Are Billions is a Steampunk strategy game set on a post-apocalyptic planet. Build and defend colonies to survive against the billions of the infected that seek to annihilate the few remaining living humans. Can humanity survive after the zombie apocalypse?
Why similar: RTS 37.9%, Tower Defense 34%, Strategy 19.5%, Real-Time with Pause 3.9% ★, Tactical 3%
Why You'll Like It: The definitive experience for defending a base against massive, overwhelming waves of enemies.
- #6 X-Morph: Defense
94% matchVery Positive91% of 4,244 reviews2017
Dev: EXOR Studios
Windows
Median: 3.0 hrsMean: 5.6 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 44.7%, Strategy 15.6%, Aliens 11.9%, Top-Down 9.6%, Sci-fi 8.1%
Why You'll Like It: Blends tower defense strategy with top-down shooter action, requiring constant tactical adjustment.
- #7 Strain Tactics
93% matchVery Positive86% of 243 reviews2017
Dev: Touch Dimensions Interactive
Windows
Median: 3.1 hrsMean: 10.4 hrs≥1hr: 63%
Strain Tactics is a real-time-with-pause tactical game, where you command a squad of soldiers to liberate earth from an alien infestation. Using your helibase, deploy your custom squad and provide air support. Remember to keep your crew sane and motivated while staying clear of alien contamination!
Why similar: Strategy 34.4%, Top-Down 18.6%, Aliens 16.2%, Action 11.9%, Sci-fi 10.7%
Why You'll Like It: Focuses on managing a squad of soldiers against alien infestations with a heavy emphasis on tactical movement.
- #8 Age of Darkness: Final Stand
91% matchMostly Positive74% of 10,665 reviews2025
Dev: PlaySide
Windows
Median: 5.6 hrsMean: 14.0 hrs≥1hr: 84%
Age of Darkness: Final Stand is a dark fantasy survival RTS where you must illuminate, build and defend humanity’s last bastion against hordes of Nightmares. Set in the remnants of a kingdom consumed by a deadly fog, you decide. Will you hide in the light? Or take back your world.
Why similar: Tower Defense 38.7%, RTS 35.1%, Strategy 16.4%, Tactical 9.9%
Why You'll Like It: Focuses on building a defensive perimeter to survive against massive, procedurally generated enemy swarms.
- #9 Anomaly: Warzone Earth
92% matchVery Positive87% of 4,693 reviews2011
Dev: 11 bit studios
Windows · Mac · Linux
Median: 2.4 hrsMean: 11.3 hrs≥1hr: 88%
Lead an armored squad through the perils of this reversed tower defense action-strategy game!
Why similar: Tower Defense 34%, Strategy 29.1%, RTS 11.1%, Sci-fi 7.3%, Action 5.1%
Why You'll Like It: Offers a unique reverse tower defense perspective that mirrors the tactical movement and pathing of Infested Planet.
- #10 Door Kickers
91% matchVery Positive94% of 10,059 reviews2014
Dev: KillHouse Games
Windows · Linux
Median: 3.7 hrsMean: 7.5 hrs≥1hr: 83%
Door Kickers is an innovative realtime strategy game that puts you in charge of a SWAT team and lets you command them during a tactical intervention.
Why similar: Strategy 25.6%, Tactical 21.9%, Top-Down 16.3%, RTS 15.8%, Real-Time with Pause 8.6% ★
Why You'll Like It: Provides excellent top-down tactical squad control that rewards careful planning and positioning.
- #11 Defense Grid: The Awakening
90% matchOverwhelmingly Positive96% of 5,377 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 68.4%, Strategy 15.7%, Sci-fi 7.1%, Aliens 4.6%, Indie 2.3%
Why You'll Like It: A classic tower defense experience that captures the strategic depth and sci-fi aesthetic of the genre.
- #12 Red Solstice 2: Survivors
89% matchMixed70% of 3,318 reviews2021
Dev: IronwardPub: 505 Games
Windows
Median: 7.7 hrsMean: 13.8 hrs≥1hr: 94%
Sequel to the best-seller The Red Solstice. Plan your strategy and infiltrate a real-time tactical battlefield - alone or with up to 7 squad members. Can you demonstrate the combat prowess to survive and secure a future for humanity?
Why similar: Strategy 30.7%, Aliens 29.6%, Sci-fi 20.3%, Tactical 15%, Singleplayer 4.4%
Why You'll Like It: Features tactical, squad-based combat against alien swarms with a strong emphasis on character abilities.
- #13 Protolife
89% matchVery Positive86% of 471 reviews2018
Dev: Volcanic Giraffe
Windows · Mac
Median: 3.8 hrsMean: 7.9 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 31.8%, RTS 28.5%, Strategy 12.9%, Aliens 8%, Sci-fi 7.5%
Why You'll Like It: Focuses on rapid base expansion and defense against spreading alien organisms in a grid-based environment.
- #14 Anomaly Defenders
88% matchMostly Positive78% of 689 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 56.5%, Strategy 27.3%, Action 7.8%, Indie 4.6%, Sci-fi 3.7%
Why You'll Like It: A more traditional tower defense entry that maintains the sci-fi tactical feel of the Anomaly series.
- #15 MarZ: Tactical Base Defense
87% matchMostly Positive78% of 890 reviews2019
Dev: Giant Grey
Windows
Median: 2.6 hrsMean: 5.5 hrs≥1hr: 70%
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 37.2%, RTS 27.8%, Strategy 17.2%, Tactical 8.7%, Sci-fi 5.4%
Why You'll Like It: Combines base building with tactical defense against Martian threats in a sci-fi setting.
- #16 Creeper World 3: Arc Eternal
86% matchOverwhelmingly Positive96% of 4,835 reviews2014
Dev: Knuckle Cracker
Windows · Mac · Linux
Median: 7.4 hrsMean: 81.0 hrs≥1hr: 78%
Creeper World 3 is what happens when cellular automata takes over a strategy simulation. Instead of discrete units that attack your base, a fluid-like substance spreads over the terraformable terrain. Your base, your weapons, your strategy... you must adapt them all.
Why similar: Tower Defense 54.6%, RTS 15.7%, Strategy 14.5%, Real-Time with Pause 4.7% ★, Sci-fi 4.5%
Why You'll Like It: Features strategic base building and defense against a fluid, overwhelming enemy force.
- #17 Revenge of the Titans
86% matchVery Positive82% of 1,258 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 52.5%, Strategy 16.9%, RTS 6.8%, Sci-fi 6.1%, Aliens 4.6%
Why You'll Like It: Features base building and tower defense against waves of aliens with a focus on tech progression.
- #18 Taur
85% matchMostly Positive80% of 2,113 reviews2020
Dev: Echo Entertainment
Windows
Median: 4.2 hrsMean: 7.0 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 43.4%, Strategy 17.1%, RTS 16.8%, Sci-fi 6.2%, Top-Down 4.4%
Why You'll Like It: Focuses on defending a base against waves of enemies with highly customizable weaponry and tactical choices.
- #19 Mindustry
83% matchOverwhelmingly Positive96% of 28,247 reviews2019
Dev: AnukenDev
Windows · Mac · Linux
Median: 4.9 hrsMean: 28.4 hrs≥1hr: 76%
An open-ended factory management game with RTS and tower defense elements.
Why similar: Tower Defense 40.5%, RTS 34.4%, Strategy 15.8%, Sci-fi 3.9%, Action 2.1%
Why You'll Like It: Combines resource management and tower defense on a massive scale, requiring complex logistical planning.
- #20 Ancient Planet Tower Defense
84% matchVery Positive82% of 1,207 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 76.1%, Strategy 19.9%, Indie 4%
Why You'll Like It: A polished, traditional tower defense game with a unique alien setting and distinct unit types.
- #21 Super Sanctum TD
84% matchVery Positive86% of 1,582 reviews2013
Dev: Coffee Stain StudiosPub: Coffee Stain Publishing
Windows · Mac
Median: 1.9 hrsMean: 34.6 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 50.5%, Strategy 14.2%, Aliens 12.3%, Sci-fi 8%, Top-Down 4.3%
Why You'll Like It: A pure tower defense experience that captures the strategic depth and isometric perspective of the genre.
- #22 AI War 2
81% matchVery Positive87% of 1,563 reviews2019
Dev: Arcen Games
Windows · Mac · Linux
Median: 3.0 hrsMean: 5.7 hrs≥1hr: 83%
The most devious and acclaimed artificial intelligence in strategy gaming is better than ever. A grand strategy/RTS hybrid that reverses many conventions of both genres. Take territory without attracting attention, build your empire with care, and adapt to an ever-evolving galactic battleground.
Why similar: Tower Defense 36.5%, RTS 33.2%, Strategy 12.7%, Sci-fi 9.5%, Tactical 8.2%
Why You'll Like It: Offers deep strategic RTS gameplay focused on asymmetrical warfare against a superior AI opponent.
- #23 2112TD: Tower Defense Survival
81% matchVery Positive87% of 448 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 35.4%, Strategy 14.9%, Top-Down 11.4%, Aliens 11.3%, Sci-fi 9.6%
Why You'll Like It: A tactical, top-down tower defense game with a gritty sci-fi aesthetic and focus on unit placement.
- #24 Harvest: Massive Encounter
82% matchMostly Positive79% of 164 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 56.9%, Strategy 28.7%, Sci-fi 6.6%, Indie 6.1%, Singleplayer 1.6%
Why You'll Like It: A classic RTS-tower defense hybrid centered on resource harvesting and defending against alien swarms.
- #25 Sanctum 2
80% matchVery Positive90% of 14,391 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 66.7%, Strategy 14.8%, Sci-fi 6.5%, Action 4.6%, Aliens 4.3%
Why You'll Like It: A hybrid of tower defense and action that emphasizes tactical placement and active combat participation.
- #26 Unstoppable Gorg
82% matchMostly Positive79% of 307 reviews2012
Dev: Futuremark
Windows · Mac
Median: 36 minMean: 6.6 hrs≥1hr: 40%
Defend the solar system from fearsome aliens by sending satellites into orbit in revolutionary tower defense action!
Why similar: Tower Defense 63.9%, Strategy 17.5%, Sci-fi 6%, Aliens 5.7%, Action 4%
Why You'll Like It: Features orbital tower defense mechanics that require constant tactical adjustment and rotation.
- #27 Alien Robot Monsters
79% matchVery Positive84% of 125 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 46.1%, Strategy 34.2%, Action 12.3%, Indie 7.5%
Why You'll Like It: A straightforward tower defense game with a focus on alien-themed waves and tactical placement.
- #28 Spoids
79% matchMostly Positive72% of 116 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 43.5%, Strategy 33.3%, Action 9.1%, Indie 7.7%, Sci-fi 6.4%
Why You'll Like It: A tactical strategy game that emphasizes defending against alien swarms using various defensive structures.
- #29 AI War: Fleet Command
77% matchVery Positive82% of 1,612 reviews2009
Dev: Arcen Games
Windows · Mac · Linux
Median: 2.7 hrsMean: 5.7 hrs≥1hr: 87%
"You are outgunned. You are massively outnumbered. You must win." These are your orders. Humanity has already fought its war against the machines -- and lost. AI death squads stand watch over every planet and every wormhole, the few remaining human settlements are held captive in orbiting bubbles, and the AIs have turned their...
Why similar: Strategy 44%, RTS 29.7%, Tower Defense 9.9%, Sci-fi 6.4%, Tactical 4.4%
- #30 Mushroom Wars 2
78% matchMixed62% of 977 reviews2017
Dev: Zillion WhalesPub: Azur Games
Windows · Mac · Linux
Median: 5.6 hrsMean: 8.4 hrs≥1hr: 91%
In Mushroom Wars 2, enemy tribes of feisty mushroom creatures face off in short but fierce RTS battles. Step into the shoes of a fearless Mushroom Commander, choose a hero to lead your army, and take control of the battlefield in a variety of multiplayer modes or challenging story campaign.
Why similar: RTS 33.8%, Tower Defense 27.5%, Strategy 24.1%, Tactical 5.8%, Action 5%
Why You'll Like It: A fast-paced, top-down RTS that focuses on capturing points and managing unit flow across the map.
- #31 Tower Dominion
72% matchVery Positive86% of 5,610 reviews2025
Dev: Parallel 45 Games
Windows
Median: 10.6 hrsMean: 22.7 hrs≥1hr: 88%
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 38.1%, RTS 26.5%, Strategy 14.4%, Tactical 8.1%, Aliens 6.4%
- #32 Creeper World: Anniversary Edition
75% matchOverwhelmingly Positive97% of 987 reviews2016
Dev: Knuckle Cracker
Windows · Mac
Median: 7.8 hrsMean: 16.4 hrs≥1hr: 80%
Imagine an enemy that is everywhere and moves like a giant, organic mass across the map. Imagine your base and your people surrounded by a blanket of crushing destruction from all directions. Your only hope, well what hope? Then you take the high ground and pound this enemy into oblivion.
Why similar: Tower Defense 46%, Strategy 44.7%, Indie 9.3%
- #33 Artificial Defense
77% 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: Strategy 41.8%, Tower Defense 34.5%, Action 13.8%, Indie 9.9%
- #34 Let Them Come
76% matchVery Positive84% of 1,380 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 46.5%, Aliens 17.1%, Strategy 11.3%, Sci-fi 7.7%, Action 7.5%
- #35 Cortex Command
76% matchMostly Positive72% of 6,052 reviews2012
Dev: Data RealmsPub: Data Realms, LLC
Windows · Mac
Median: 2.4 hrsMean: 5.3 hrs≥1hr: 80%
Choose between different factions, with their own set of expendable soldiers, mechas, and weapons. Protect your brain, mine gold, and destroy the enemy cortex in his bunker complex!
Why similar: Strategy 85.9%, RTS 3.8%, Sci-fi 3.5%, Action 3%, Indie 2.2%
- #36 Anomaly Korea
75% matchMostly Positive78% of 801 reviews2013
Dev: 11 bit studios
Windows · Mac · Linux
Median: 2.8 hrsMean: 5.5 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: Strategy 39.3%, Tower Defense 34.8%, Action 11.2%, Sci-fi 7.8%, Top-Down 3.7%
- #37 Axom: Conquest
71% matchVery Positive80% of 54 reviews2026
Dev: Hairy Penguin
Windows
Build and defend your fortress while expanding out in this hold-out tower defense roguelite. Battle across a procedural alien homeworld, fight back corrupted terrain, discover hundreds of structures and upgrades as physics-driven swarms threaten to wipe out humanity.
Why similar: Tower Defense 30.7%, RTS 26.1%, Strategy 12.7%, Top-Down 9.6%, Aliens 9.5%
- #38 Fortified
73% matchMostly Positive75% of 1,738 reviews2016
Dev: Siege Camp
Windows
Median: 3.2 hrsMean: 5.0 hrs≥1hr: 89%
Fortified is an explosive strategy shooter where players will defend the Earth against a menacing Martian invasion in the 1950s. Play as one-of-four pulp inspired heroes as they fight swarms of terrifying robots with an arsenal of Cold War era weapons and experimental technology.
Why similar: Action 60.9%, Tower Defense 22.8%, Strategy 7.4%, Aliens 4.5%, Sci-fi 2.2%
- #39 Infectonator: Survivors
74% matchMixed67% of 1,169 reviews2016
Dev: Toge Productions
Windows · Mac
Median: 3.1 hrsMean: 5.4 hrs≥1hr: 86%
"Infectonator : Survivors" is a Randomized Permadeath Survival Simulator that combines RTS, Tower Defense, Roguelike, and Management-Simulation gameplay. The goal is to lead a group of survivors in a struggle to stay alive and find rescue in a zombie apocalyptic world.
Why similar: Tower Defense 44.7%, Strategy 32.7%, RTS 8.3%, Action 6.3%, Indie 6.1%
- #40 Molten Armor
74% matchMixed62% of 61 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 31.9%, RTS 28.1%, Strategy 14.6%, Top-Down 8.3%, Sci-fi 7.3%
- #41 No Creeps Were Harmed TD
70% matchVery Positive89% of 501 reviews2024
Dev: MinMax Games Ltd.
Windows
Median: 2.8 hrsMean: 5.6 hrs≥1hr: 76%
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 45.4%, Strategy 17.4%, Aliens 12.5%, Sci-fi 11%, Tactical 6.4%
- #42 The Red Solstice
73% matchMostly Positive71% of 2,559 reviews2015
Dev: Ironward
Windows
Median: 3.2 hrsMean: 9.7 hrs≥1hr: 88%
2280 A.D. The last few survivors of a ruined Earth seek a new home: Mars, a planet whose inhabitants didn't take too kindly to outsiders. The Red Solstice is a tense, tactical, squad-based action game. Fight to survive with up to 8 players in co-op, or lead your own squad in single-player mode.
Why similar: RTS 30.6%, Strategy 14.9%, Aliens 13.2%, Top-Down 10.9%, Tactical 9.8%
- #43 Defense Task Force - Sci Fi Tower Defense
73% matchMixed66% of 53 reviews2018
Dev: ChillX Ltd
Windows
Defense Task Force Featuring Large Scale Procedurally Generated Tower Defense Battles with FPS Quality Visuals and Infinite Waves. 10 tower types, with different attacks , 3 levels plus boosts. 25 Enemy alien species: Regulars, Swarmers, Racers, Cloakers, Healers, Boss Units and Spawners.
Why similar: Tower Defense 56.3%, Strategy 27.3%, Sci-fi 10.5%, Indie 6%
- #44 Siege of Centauri
71% matchMixed66% of 451 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 44.6%, Strategy 17.9%, Aliens 12.7%, Sci-fi 9.8%, Tactical 9.5%
- #45 Space Run
70% matchVery Positive85% of 2,151 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 64.9%, Strategy 22%, Sci-fi 7.4%, Indie 3.2%, Action 1.5%
- #46 Beware Planet Earth
72% matchMostly Positive72% of 343 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 54.6%, Strategy 16.9%, Aliens 12.7%, Sci-fi 6.4%, Top-Down 4.2%
- #47 Xeno Command
69% matchVery Positive83% of 58 reviews2022
Dev: ChillyRoomPub: ChillyRoom
Windows
Defend galaxy against Alien invasion in the RTS offline game with roguelike fun
Why similar: Tower Defense 30.9%, RTS 27.3%, Strategy 13.2%, Top-Down 10.2%, Aliens 9.1%
- #48 Survivor Squad: Gauntlets
71% matchMostly Positive75% of 163 reviews2015
Dev: Endless Loop Studios
Windows · Mac · Linux
Median: 5.0 hrsMean: 5.5 hrs≥1hr: 96%
Command your Squad of Survivors in a game where Line of Sight is extremely important, you cannot shoot what you cannot see. Develop your formations, move as a unit and cover every corner. Leave no man behind!
Why similar: Strategy 40.2%, Top-Down 22.4%, Action 14%, Real-Time with Pause 11.2% ★, Indie 9%
- #49 CARNAGE OFFERING Tower Defense
67% matchVery Positive91% of 347 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 43.4%, RTS 36.5%, Strategy 18.1%, Action 1.2%, Indie 0.8%
- #50 Gore Storm
68% matchVery Positive94% of 70 reviews2023
Dev: Gundorado
Windows
Battle massive hordes of alien monsters to secure humanity's presence on planet Gore. Upgrade your base, hire troops, and install turrets to fight back the ever growing waves of aliens.
Why similar: Tower Defense 47.9%, Top-Down 16%, Aliens 11.8%, Sci-fi 9.4%, Action 9.2%
- #51 Xenonauts
69% matchVery Positive87% of 5,076 reviews2014
Dev: Goldhawk Interactive
Windows · Mac · Linux
Median: 8.2 hrsMean: 19.8 hrs≥1hr: 87%
Xenonauts is a strategy game in which you control a multi-national military organisation defending a Cold War-era Earth from alien invasion, using small squads of persistent soldiers to eliminate the extraterrestrials and recover their technology in turn-based ground combat.
Why similar: Strategy 28.8%, Aliens 25.8%, Tactical 17.8%, Sci-fi 15.9%, Singleplayer 5.4%
- #52 Creeper World IXE
67% matchMixed70% of 889 reviews2024
Dev: Knuckle Cracker
Windows
Median: 13.7 hrsMean: 14.9 hrs≥1hr: 86%
The unstoppable alien force known as The Creeper has returned, devouring thousands of worlds in its path, and yours is next. Battle against the Creeper fluid in a groundbreaking pixel-level simulation to prove that humanity will rule the galaxy forever!
Why similar: Tower Defense 36%, RTS 34.7%, Strategy 12.9%, Sci-fi 5.7%, Tactical 5%
- #53 Alien Shooter TD
68% matchVery Positive85% of 919 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 44.7%, Strategy 18.5%, Aliens 14.4%, Sci-fi 10.8%, Action 6.3%
- #54 Towerful Defense: Prologue
66% 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 33.2%, RTS 24.8%, Strategy 14.4%, Aliens 9.8%, Top-Down 9.3%
- #55 Zombie Defense
67% matchVery Positive84% of 2,178 reviews2016
Dev: Home Net Games
Windows · Mac · Linux
Median: 1.6 hrsMean: 6.9 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 54.9%, Strategy 17.4%, RTS 14.7%, Action 5.2%, Top-Down 3.5%
- #56 Stellar Initiative
66% matchMostly Positive77% of 414 reviews2024
Dev: Five Head Games
Windows
Median: 1.8 hrsMean: 6.5 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 51.9%, Strategy 20.1%, Sci-fi 12.4%, Aliens 12%, 2D 2.1%
- #57 Defense Zone
69% matchVery Positive82% of 85 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 63.6%, Strategy 30.2%, Indie 6.2%
- #58 Rush for Glory
70% matchMixed61% of 150 reviews2014
Dev: Parseh Game StudioPub: KATNAPPE SP. Z O. O.
Windows
Median: 24 minMean: 29.5 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 62.6%, Strategy 29.2%, Action 8.3%
- #59 Warpips
65% matchVery Positive87% of 5,222 reviews2022
Dev: Skirmish Mode GamesPub: Daedalic Entertainment
Windows
Median: 2.0 hrsMean: 8.2 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 35.8%, RTS 33%, Strategy 15.9%, Tactical 8.1%, Action 2.7%