Games Like Immortal Defense

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 70.7%, Strategy 16.1%, Sci-fi 8.8%, Indie 4.3%

Why You'll Like It: A quintessential sci-fi tower defense experience that matches the strategic polish and atmospheric tone of the seed game.

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 63.3%, Strategy 13.9%, Sci-fi 7.5%, Action 6.3%, Great Soundtrack 5.3%

Why You'll Like It: Combines first-person action with tower defense in a sci-fi setting, offering a more immersive perspective on defending your path.

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 67.1%, Strategy 18.5%, Indie 4.9%, Action 3.6%, Great Soundtrack 3%

Why You'll Like It: Provides the deep, complex strategic layers and progression systems that fans of classic tower defense crave.

An open-ended factory management game with RTS and tower defense elements.

Why similar: Tower Defense 67.5%, Strategy 26.2%, Indie 3.5%, Action 2.8%

Why You'll Like It: Features deep automation and base-building mechanics within a sci-fi universe that requires constant strategic defense.

Control powerful mechs from the future to defeat an alien threat. Each attempt to save the world presents a new randomly generated challenge in this turn-based strategy game.

Why similar: Strategy 47.3%, Great Soundtrack 19.5%, Sci-fi 18.1%, Indie 15.1%

Why You'll Like It: Captures the existential weight of defending a world against overwhelming odds through tight, grid-based strategic combat.

This "spaceship simulation roguelike-like" allows you to take your ship and crew on an adventure through a randomly generated galaxy filled with glory and bitter defeat.

Why similar: Space 35.7%, Strategy 23.6%, Sci-fi 18.4%, Difficult 13.2%, Indie 9%

Why You'll Like It: A narrative-rich space strategy game where every decision carries heavy consequences, mirroring the high-stakes feel of Immortal Defense.

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 50.2%, Space 20%, Strategy 16.8%, Sci-fi 7%, Indie 4.5%

Why You'll Like It: A unique take on space-based defense that forces you to protect a path while managing logistics and ship upgrades.

Crying Suns is a tactical rogue-lite that puts you in the role of a space fleet commander as you explore a mysteriously fallen empire. In this story rich experience inspired by Dune and Foundation, each successful run will uncover the truth about the Empire... and yourself as well.

Why similar: Space 29%, Strategy 25.7%, Sci-fi 17%, Dark 10.2%, Indie 9.1%

Why You'll Like It: A tactical roguelite that emphasizes a dark, atmospheric sci-fi story and the strategic management of a dying fleet.

Factorio is a game about building and creating automated factories to produce items of increasing complexity, within an infinite 2D world. Use your imagination to design your factory, combine simple elements into ingenious structures, and finally protect it from the creatures who don't really like you.

Why similar: Strategy 83.2%, Indie 16.8%

Why You'll Like It: Offers an expansive sci-fi setting where defending your growing infrastructure against alien threats is a core, satisfying loop.

"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 41.4%, Space 15.5%, Great Soundtrack 9.9%, Tower Defense 9.3%, Sci-fi 7.3%

Why You'll Like It: Delivers an epic, grand-scale space strategy experience that captures the feeling of a long-term, desperate war for survival.

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 42.9%, Strategy 17.9%, Space 16.9%, Sci-fi 14.1%, Action 8.3%

Why You'll Like It: A modern, gritty sci-fi tower defense game that emphasizes survival and tactical positioning.

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 69.8%, Strategy 19%, Indie 6.1%, Sci-fi 5.1%

Why You'll Like It: A classic sci-fi tower defense title that focuses on tactical variety and planetary defense.

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 40.6%, Level Editor 17.9%, Strategy 16.1%, Sci-fi 10.8%, Story Rich 7.4%

Why You'll Like It: Focuses on large-scale, real-time defensive tactics against massive swarms in a sci-fi setting.

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 36.5%, Tower Defense 30.5%, Action 17.3%, Indie 15.7%

Why You'll Like It: A tactical tower defense game that focuses on building complex mazes to stop waves of enemies.

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 34.3%, Strategy 15.7%, Space 15.4%, Difficult 10.6%, Psychedelic 7.8%

Why You'll Like It: A colorful, fast-paced tower defense game that offers a more accessible take on the genre.

Pilot drones into derelict spaceships to find the means to survive and piece together how the universe became a giant graveyard.

Why similar: Space 34.2%, Strategy 22.4%, Difficult 21.1%, Sci-fi 15%, Atmospheric 7.2%

Why You'll Like It: An atmospheric, minimalist sci-fi game that focuses on the tension of remote-controlling drones to defend against unknown threats.

A classic survival horror experience set in a dystopian future where humanity has uncovered a dark secret. Unravel a cosmic mystery, escape terrifying creatures, and scavenge an off-world government facility as Elster, a technician Replika searching for her lost dreams.

Why similar: Sci-fi 39.7%, Dark 25.7%, Atmospheric 20.1%, Action 14.5%

Why You'll Like It: A deeply atmospheric, existential sci-fi experience that shares the melancholic tone and transhumanist undertones of the seed game.

The Talos Principle is a first-person puzzle game in the tradition of philosophical science fiction. Made by Croteam and written by Tom Jubert (FTL, The Swapper) and Jonas Kyratzes (The Sea Will Claim Everything).

Why similar: Great Soundtrack 32.9%, Sci-fi 24.6%, Story Rich 13.6%, Atmospheric 12.2%, Difficult 8.4%

Why You'll Like It: Explores profound philosophical and existential themes within a sci-fi environment, appealing to the narrative depth of the seed game.

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 41.6%, Strategy 30.5%, Action 15.7%, Indie 12.2%

Why You'll Like It: A straightforward, action-oriented tower defense game set in a classic sci-fi environment.

Gather coins, build defenses and reclaim your fallen Kingdom. Explore and uncover secrets, unlock new technologies and protect your crown versus waves of Greed monsters that come at night. Kingdom is a solo or co-op micro-strategy and tower defense game set in an atmospheric pixel world.

Why similar: Tower Defense 70.4%, Strategy 20.8%, Atmospheric 8.7%

Why You'll Like It: Features a minimalist, atmospheric approach to base defense that emphasizes the cyclical nature of protecting your domain.

Defend the solar system from fearsome aliens by sending satellites into orbit in revolutionary tower defense action!

Why similar: Tower Defense 60.9%, Strategy 16.5%, Sci-fi 6.9%, Action 5.4%, Space 5.3%

Why You'll Like It: A sci-fi tower defense game that features a unique, rotating orbital defense mechanic.

Explore a galaxy full of wonders in this sci-fi grand strategy game from Paradox Development Studios. Interact with diverse alien races, discover strange new worlds with unexpected events and expand the reach of your empire. Each new adventure holds almost limitless possibilities.

Why similar: Space 37%, Strategy 24.8%, Sci-fi 19.6%, Great Soundtrack 14.8%, Atmospheric 3.8%

Why You'll Like It: Allows for long-term, grand-scale space strategy where existential threats and transhumanist themes are central to the experience.

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 52.8%, Strategy 25.2%, Action 10.4%, Indie 7.8%, Sci-fi 3.9%

Why You'll Like It: A reverse tower defense game that provides a fresh perspective on the genre within a polished sci-fi universe.

Experience the epic space strategy games that redefined the RTS genre. Control your fleet and build an armada across more than 30 single-player missions. Choose unit types, fleet formations and flight tactics for each strategic situation.

Why similar: Space 33.5%, Strategy 22.3%, Great Soundtrack 19.9%, Sci-fi 14.3%, Story Rich 5.1%

Why You'll Like It: An iconic space strategy series that excels at delivering a grand, cinematic narrative of survival and defense.

Distant future… Brutal gladiatorial battles is a top-rated show, extremely popular all over the Universe. You’ve been sent to the abandoned planet as one of the participants of the show. Your goal is to survive as long as possible, fighting back deadly creatures in the focus of billions of viewers.

Why similar: Tower Defense 31.4%, Great Soundtrack 17.2%, Action 11%, Difficult 10.6%, Sci-fi 8.9%

Why You'll Like It: An action-heavy tower defense game that provides a more visceral, combat-focused experience.

In this uniqueTower Defense you will travel through William’s mind in a colored and dreamlike universe.

Why similar: Tower Defense 55.5%, Strategy 23.2%, Indie 11.4%, Action 9.9%

Why You'll Like It: An atmospheric tower defense game that weaves a personal, emotional story into its defensive gameplay.

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 42.6%, Space 21%, Strategy 17.6%, Sci-fi 13.2%, Indie 5.5%

Observation is a sci-fi thriller uncovering what happened to Dr. Emma Fisher, and the crew of her mission, through the lens of the station’s artificial intelligence S.A.M.

Why similar: Space 34.7%, Indie 28.4%, Sci-fi 22.2%, Story Rich 7.7%, Atmospheric 7.1%

Why You'll Like It: A narrative-heavy sci-fi game that places you in the role of an AI, echoing the 'path defender' perspective of the seed game.

The ultimate mash-up of Real-time Strategy and Tower Defense!

Why similar: Tower Defense 57%, Strategy 18.2%, Sci-fi 8%, Indie 6.6%, Action 5.3%

Why You'll Like It: A classic indie tower defense game that features deep tech trees and a persistent sci-fi campaign.

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 74.4%, Strategy 19%, Indie 6.6%

Why You'll Like It: A visually striking tower defense game that emphasizes strategic pathing and enemy management.

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 35.5%, Strategy 33.8%, Sci-fi 16.5%, Indie 14.2%

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 64.8%, Great Soundtrack 12.7%, Strategy 12.7%, Action 5.1%, Indie 2.4%

Test your mind with this twist on a Tower Defense genre, wrapped up in a deep, dark story! Play as a scientist punishing ignorant peasants with burning balls of lava!

Why similar: Tower Defense 28.7%, Strategy 18.3%, Great Soundtrack 17.5%, Action 9.4%, Indie 7.5%

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 53%, Strategy 14.7%, Difficult 11.3%, Sci-fi 10.1%, Action 6.1%

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 66%, Strategy 17.3%, Sci-fi 6.6%, Level Editor 6%, Indie 4%

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 60.9%, Strategy 28.6%, Indie 10.6%

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 54%, Strategy 27.4%, Indie 11.1%, Action 7.4%

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 39.2%, Strategy 29.7%, Indie 12.4%, Action 11.7%, Sci-fi 7%

Defense: Abominations is a first person tower defense game where you try to survive the abominations stored in the laboratory, as long as you can.

Why similar: Tower Defense 26.4%, Strategy 24.4%, Great Soundtrack 13.7%, Action 13.4%, Indie 10.9%

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 36.3%, Strategy 28.6%, Space 19.1%, Sci-fi 11.2%, Indie 4.7%

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 38%, Strategy 28.6%, Action 14.3%, Indie 11.3%, Sci-fi 7.8%

You have 9 days to find a safe place on the planet. Your ship is low on fuel and you have to land. Setup sentry guns around you to defend yourself while you collect more fuel for the ship. AI controlled Drones and Tanks attack you trying to find weaknesses in your defenses.

Why similar: Tower Defense 43.7%, Strategy 20.8%, Action 11.3%, Sci-fi 9.5%, Indie 8.7%

Zero Zone 2020 is a classic Tower defense game where you will need to defend a home base from swarms of enemies

Why similar: Tower Defense 60.4%, Strategy 26.1%, Action 13.5%

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 50%, Strategy 19.9%, Sci-fi 8.9%, Action 7.1%, Space 6.4%

The Last Tower is an Arcade tower defense infinite runner game, your job is to prevent the invading alien armies from destroying mankinds last stronghold, the goal of The Last Tower is to get the highest score possible

Why similar: Strategy 49.2%, Action 29.2%, Indie 21.6%

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 40.8%, Strategy 18.5%, Difficult 11.3%, Sci-fi 11.3%, Action 8.3%

You think Tower Defense games are all about building? You thought wrong. Sanctum is not your average Tower Defense title. When the havoc starts, you get to join the fray! As one of the world’s first First Person Shooter - Tower Defense games, Sanctum has taken the best of both worlds to deliver an epic, one-of-a-kind experience.

Why similar: Tower Defense 61.6%, Strategy 14.9%, Sci-fi 6.6%, Action 6.4%, Great Soundtrack 5.3%

CREEPS CRUMBLE. HEROES RISE. Command a team of renegade heroes and impale, slash, tear and burn through legions of undead hell-bent on world domination. Your mission: to defeat the world’s most powerful vampire, Count Necrosis.

Why similar: Tower Defense 61.3%, Strategy 14.9%, Great Soundtrack 7.5%, Action 6.4%, Indie 6.3%

Firebase Defence is a new spin on the traditional tower defence gameplay. You have to defend yourself from the waves upon waves of incoming enemies. You are free to build, place and manage your available resources and units in any way you want. But failing to balance those will result in defeat!

Why similar: Tower Defense 38.8%, Strategy 22.4%, Action 11.9%, Great Soundtrack 11.5%, Indie 9.1%

Lead an armored squad through the perils of this reversed tower defense action-strategy game!

Why similar: Tower Defense 39.7%, Strategy 33.5%, Sci-fi 10.3%, Action 8.5%, Indie 8%

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 63.1%, Strategy 27.3%, Indie 9.5%

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 52.8%, Strategy 25.3%, Sci-fi 11.9%, Indie 10.1%

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 68.5%, Strategy 17.5%, Indie 6.4%, Difficult 5.1%, Atmospheric 2.5%

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 48.2%, Strategy 19.4%, Sci-fi 13.8%, Dark 7.1%, Indie 7%

Defend Billy and his crew on their way to the extraction zone! You have been authorized to use the defense system. Protect them from giant bugs, malfunctioning droids and more...

Why similar: Strategy 44.7%, Sci-fi 26%, Indie 17.8%, Tower Defense 11.5%

Collect resources and establish a defense line before dark And then Facing countless enemies

Why similar: Tower Defense 62.2%, Strategy 24.7%, Difficult 7.4%, Indie 5.6%

Fight off hordes of monstrous mutants created from a strange cataclysmic event in the new tower defense game, Prime World: Defenders. Join a group of exile treasure hunters who have ventured into the capital of an ancient empire, vast with mystery and danger.

Why similar: Tower Defense 68.3%, Strategy 17.5%, Great Soundtrack 7.5%, Indie 5.3%, Action 1.4%

Hardcore 2D game with a fascinating and unusual mechanics, where you have to defend the base from annoying saboteurs.

Why similar: Tower Defense 26.4%, Great Soundtrack 25.5%, Action 20.9%, Indie 15.2%, Difficult 12%

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 60.7%, Strategy 28%, Action 11.4%