Games Like Save Our Solar System

Faith & Shield: 4044 Tower Defense game, where you protect the human settlement from the incoming invaders, robots and other creatures, never seen before on our planet.

Why similar: Tower Defense 30.5%, Aliens 20.4%, Sci-fi 11.8%, Futuristic 9.9%, Strategy 8.8%

Build towers and learn abilities to defend against swarms of hundreds of on-screen hostile alien creatures. Choose between sets of randomized upgrades that both upgrade you and the alien swarm. From enormous explosions to far-reaching flamethrowers, no two games are the same.

Why similar: Tower Defense 25.2%, Aliens 19.9%, Building 10.6%, Space 9.7%, Sci-fi 9%

beep-bop-bib -- Objective defended the Core from endless waves of enemy's, level-up, collect resources and data, to improve, research and upgrade your chance of survivability...

Why similar: Tower Defense 39%, Bullet Hell 16.9%, Space 11.7%, Strategy 11.2%, Aliens 10.8%

Threats To Humanity: Includes 5 unlockable levels, a new upgrade system, new turrets, and intense enemy and boss encounters. The Arsenal Shop is coming soon, with more levels, turrets, and content planned in future updates and free DLC. 🔥

Why similar: Tower Defense 25.2%, Bullet Hell 15.6%, Strategy 13.7%, Shooter 12.2%, Aliens 12%

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 25.7%, Automation 17.2%, Aliens 13.5%, Sci-fi 8.8%, Building 8.1%

A hardcore sci-fi survival game spanning 400+ procedurally generated star systems. Defend, mine, trade, fight, and command your way through a galaxy where five factions never stop expanding and every resource fuels your next desperate move.

Why similar: Tower Defense 21.4%, Space 18.5%, Strategy 15.6%, Hero Shooter 15.2% ★, Shooter 13.6%

Defend your planet from waves of robot invaders! Build powerful turrets, upgrade your defenses, and command robot units to fight drones, tanks, and massive bosses. Then send your own forces to attack the enemy planet in this action-packed sci-fi tower defense game.

Why similar: Tower Defense 28.2%, Aliens 15.4%, Space 10.6%, Strategy 10.6%, Sci-fi 8.8%

2D space shooter and turret defense come together to create the Planetary Defense System this world needs! Shoot down asteroids and aliens and survive the bosses in this arcade like game featuring customizable satellites, projectiles, and upgradable Cannon and Planet Shield systems.

Why similar: Tower Defense 24.7%, Aliens 16.6%, Space 15.6%, Bullet Hell 14.8%, Shooter 10.2%

INTERGALACTICORP. is a sci-fi rogue-lite tower defense game where you take on the role of an operator-bot, charged with conducting an intergalactic mining operation. Will you thrive as an efficient miner in this alien environment, or succumb to the dangers that lurk in the depths of space?

Why similar: Tower Defense 26.7%, Automation 20.6%, Space 15.6%, Sci-fi 10.7%, Futuristic 8.9%

Players resist enemy invasion by building production bases, constructing conveyor belts, upgrading carriers, and strengthening weapons.

Why similar: Tower Defense 31.7%, Bullet Hell 20.3%, Strategy 15.5%, Shooter 13.2%, Futuristic 8.3%

Rise of Mutant Swarms is a strategy survival tower-defense game where you defend the base against waves of evolving mutant enemies. Place and upgrade turrets, adapt to enemy abilities, and make critical decisions as the pressure rises with every wave.

Why similar: Tower Defense 31.1%, Aliens 16.9%, Strategy 13.9%, Sci-fi 11.6%, Building 9.1%

Defend the galaxy as a mystical gem civilization! Gemspire: Incremental Invasion blends tower defense with incremental mechanics. Build crystal towers, upgrade magical defenses, and repel endless waves of futuristic alien invaders in this fantasy 2D strategy game.

Why similar: Tower Defense 38%, Bullet Hell 26.2%, Strategy 13.2%, Futuristic 10.4%, Fantasy 6.5%

Celestial Wardens is a sci-fi tower defense game where you command a lone spaceship to defend a planet under siege. Survive waves of enemies, build turrets, upgrade your ship, and manage your planet to prevent total annihilation.

Why similar: Tower Defense 34.4%, Space 17.3%, Aliens 11.2%, Shooter 10.8%, Strategy 10.1%

Spaceships and Cellular Automata is a tower defense game set in space! Place different towers to defend your ship against the waves of aliens. The enemies are simulated based on Conway's Game of Life. Even just one of your bullets is enough to cause a destabilizing chain reaction to destroy them!

Why similar: Tower Defense 38.5%, Space 22.2%, Aliens 15%, Strategy 13.6%, Sci-fi 6.7%

Defend your planet from relentless stream of incoming asteroids in this fast-paced 2D tower defence game. Strategically place defensive buildings and upgrade your arsenal to protect your world from destruction!

Why similar: Tower Defense 37.2%, Bullet Hell 14.4%, Strategy 14.2%, Space 13.7%, Sci-fi 9.3%

Autothysis is a first-person tower defense game where strategy meets precision. Deploy turrets, manage resources, and fight swarms of insectoid enemies. Target weak points to shatter foes while upgrading defenses to survive escalating waves. Can you withstand the oncoming horde?

Why similar: Tower Defense 29.4%, Aliens 16.4%, Space 13.5%, Sci-fi 10.8%, Strategy 8.4%

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 52.7%, Space 25.8%, Strategy 12.3%, Sci-fi 8.6%, Singleplayer 0.7%

Manny TD is a hybrid tower defense and third-person shooter with random in game elements. Join and get your personal high score!

Why similar: Tower Defense 30.8%, Aliens 15.5%, Strategy 15.2%, Shooter 14.7%, Space 9.3%

Build your towers, plan your efforts, watch out for changing paths and strike back against the alien invaders in this challenging tower defense game!

Why similar: Tower Defense 28.3%, Aliens 15.7%, Sci-fi 10.2%, Building 9.9%, Robots 8.8%

Flowchart is your weapon. Recursion is a strategy game merging logic circuit design with tower defense. architect their paths, and defend the system by engineering the perfect logic loop with maximum efficiency.

Why similar: Tower Defense 32.9%, Automation 27.9%, Building 15.4%, Strategy 12%, Futuristic 4.7%

TEP the destroyer is a single player tower defense game where you will face alien monsters and ships in ground and space battles! Your strategy will decide the fate of your people in a sci-fi environment of varying difficulties!

Why similar: Tower Defense 26.1%, Aliens 18.7%, Space 13.3%, Sci-fi 10.5%, Futuristic 10.4%

A space automation game with rogue lite elements. Take the role of a rogue defense drone building up a mining and defense industry in the far reaches of space.

Why similar: Automation 31.5%, Tower Defense 28.1%, Strategy 16.2%, Building 10.7%, Space 9.6%

Space Nature Attack TD is a tower defense where you can level up and customize tower stats and elements to your liking! Fend off various types of alien creatures across many different sci-fi planet themed maps, biomes, and difficulties!

Why similar: Tower Defense 41%, Aliens 18.3%, Strategy 16%, Space 13%, Sci-fi 9.7%

Enjoy this full strategic Tower Defence with something more. To complete each level you must defend from hordes of aliens and then attack their Teleports to stop them from coming. And, in the end, defeat the Bosses!

Why similar: Tower Defense 27.5%, Bullet Hell 18%, Aliens 15.8%, Strategy 12.2%, Sci-fi 7.3%

A Roguelike Tower Defense in space with missions to conquer. Can you hold against the spreading alien bosses? Build and upgrade towers against the corruption. Choose your technologies and warpspeed your way to victory.

Why similar: Tower Defense 29.3%, Building 14.5%, Aliens 13.7%, Space 12.1%, Strategy 10.1%

'Galaxy Defense War' is a roguelike tower defense game where you need to select suitable galactic principles from randomly dropped heroes and equipment to form a combat-ready team to resist alien invaders.

Why similar: Tower Defense 36.3%, Aliens 17.6%, Strategy 14.7%, Building 14.4%, Cartoon 11.3%

Be the ultimate CEO and military strategist in this genre fusion of strategy and business management. Create your own company, hire employees, research weapon technology, and take control of units on the battlefield to defend the moon against an alien invasion. Aliens down, profits up!

Why similar: Tower Defense 28.1%, Aliens 21.6%, Automation 15.6%, Sci-fi 11.2%, Space 9.6%

Outpost 4 is a 2D cartoon-style idle resource management game focused on combat and progression. You will take your mobile base across different alien planets, each with its own unique enemies to conquer. With 20+ weapons and 100+ items, you can freely combine builds and create your own style

Why similar: Tower Defense 34.5%, Bullet Hell 20.7%, Strategy 15.8%, Aliens 15.4%, Cartoon 9.6%

Aliens Falling from the Sky? reimagines tower defense with intense action and tactical depth. Build, upgrade, and combine powerful towers to stop relentless alien waves — because somehow, saving the world is your problem now.

Why similar: Tower Defense 41.3%, Aliens 23.9%, Space 21.6%, Strategy 11.4%, Singleplayer 1.9%

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

Why similar: Tower Defense 62.5%, Strategy 11.8%, Aliens 10.7%, Sci-fi 8.4%, Space 6.6%

Become Romby, a tiny crystal lost in space! Survive and defend the crystal against dark waves by upgrading crazy weapons, planting strange flowers, and using tarot cards. Explore constellations, defeat bosses, and unlock over 100 unique skills.

Why similar: Tower Defense 31.1%, Bullet Hell 19.5%, Space 15.2%, Shooter 9.4%, Strategy 8.5%

Scrap Bastion is a strategy tower defense game where you manage your city, equipping it to survive the waves of mutant creatures, testing your planning and decision making capacities at every turn. Watch out, as time is crucial to win!

Why similar: Tower Defense 37.5%, Aliens 14.2%, Bullet Hell 13.1%, Strategy 12.3%, Tactical 7.1%

Bumper Blitz TD redefines tower defense with gravity-powered physics and dynamic gameplay. Build, upgrade, and bounce enemies away in this thrilling fusion of strategy and action!

Why similar: Tower Defense 44.1%, Aliens 20.4%, Space 14.1%, Strategy 12.2%, 2D 5.8%

《孤军深入》是一款结合策略、防御和射击元素的游戏，玩家需要合理利用有限的资源，通过生成和升级弹药，来抵御不断涌来的敌人，保卫战士。 建造，弹药合成，射击，空间管理，资源管理

Why similar: Tower Defense 37.6%, Bullet Hell 25.9%, Strategy 18.7%, Sci-fi 12.2%, 2D 4.4%

Circuit Defense is a grid-based tower defense game. Build power lines, connect functional modules, and energize your turrets to create a high-efficiency network. Master your layout and optimize module synergies to survive the relentless enemy swarm.

Why similar: Tower Defense 30.8%, Bullet Hell 18.7%, Building 17.5%, Automation 13.2%, Strategy 11.9%

A tower defense strategy science fiction game, in the future era, when aliens invade the solar system, players need to build various turrets to resist alien attacks and guard the Milky Way and solar system.

Why similar: Tower Defense 39.7%, Aliens 18%, Strategy 15.4%, Space 12.9%, Futuristic 7.1%

We've traveled to the past to conquer these fertile lands. Now, you must defend them from the blood cult intent on taking it for themselves. Be careful though: from where their blood is spilled, ancient magicks empower whomever is still alive.

Why similar: Tower Defense 39.7%, Strategy 14.3%, Futuristic 13.7%, Building 8.5%, Fantasy 6.4%

ElectraPlanet is a Multiplayer Adventure/Survival game. Exploring to find resources and later on, build an empire to protect and produce electricity as much as you can! With that electricity become the king of your planet!

Why similar: Automation 20%, Aliens 19.1%, Space 14.3%, Building 11.7%, Futuristic 11.5%

A planetary tower defense where enemies attack across land, air, and space. Build layered defenses, manage resources, and survive an escalating alien invasion.

Why similar: Tower Defense 37.9%, Strategy 10.5%, Space 8.9%, Building 7.6%, Aliens 7.3%

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 46.3%, Aliens 20.5%, Strategy 9.8%, Sci-fi 7.7%, Space 6.4%

Terra Forma is a pixelated 2D tower defense, inspired by Flash-age classics. Build a dozen unique towers and create even more fusions by combining shock, ice, fire, and iron. Prove your command prowess one final time, and defend mankind's final hope.

Why similar: Tower Defense 44%, Strategy 16.1%, Aliens 10.3%, Sci-fi 9.4%, Futuristic 9.1%

A Tower Defense Action game, set in a bright geometric world. Combine shooting skills with strategic thinking to fight off waves of enemies, and defend your base.

Why similar: Tower Defense 41.9%, Bullet Hell 18.1%, Shooter 16.5%, Strategy 14.6%, Sci-fi 6.7%

Fight across five solar systems in a story-driven mix of tower defense and space combat, where every planet you save brings you closer to the truth and to those you thought were lost.

Why similar: Tower Defense 26.8%, Automation 13.8%, Space 13.8%, Aliens 13.2%, Shooter 10.2%

Tower Tactics Arena is a fast-paced action roguelite set in the Tower Tactics: Liberation universe. Battle relentless enemy waves in a closed combat arena, level up your towers strategically, and gather powerful trinkets and potions! Will you claim victory in the arena?

Why similar: Tower Defense 28.8%, Bullet Hell 13.7%, Space 13.4%, Sci-fi 12.9%, Shooter 9.6%

Crystalia is a first-person tower defense game mixing automation, management and exploration set in a utopian sci-fi world built on crystal extraction. Dig into caves, build autonomous defense zones and uncover the history of a civilization shaped around crystals.

Why similar: Tower Defense 29.3%, Automation 27.1%, Building 15.5%, Shooter 10.1%, Strategy 8.5%

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 66.5%, Strategy 10.5%, Sci-fi 9.8%, Aliens 8.6%, Futuristic 3%

Defend your AI capital against endless alien invasions in this space shmup-inspired tower defense with roguelite randomness. Dissect bodies and ships to unlock weirdly powerful tech. Upgrade your base with turrets, turning your screen into a symphony of perfect destruction!

Why similar: Tower Defense 26.8%, Aliens 20.5%, Bullet Hell 18.5%, Sci-fi 10.7%, Space 7.7%

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 43.3%, Strategy 11.8%, Automation 10.9%, Sci-fi 9.1%, Space 6.8%

Totally Defenceless is a wave-based tower defence game. You will need to protect your energy cores from the invading alien bugs by strategically constructing a maze of towers to alter their path to your advantage.

Why similar: Tower Defense 32.7%, Aliens 17.9%, Strategy 8.9%, Sci-fi 8.7%, Tactical 8%

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 28.8%, Aliens 17.5%, Space 13.8%, Sci-fi 11.1%, Strategy 8.3%

"Arms Evolution: ZOMBIE DESTROYER" is a unique Roguelite tower defense game. You will slaughter thousands of zombies in the game and enhance your weapon towers through build character in the RPG way. and , the game also offers an idle mode, so you can enjoy building weapons anytime and anywhere.

Why similar: Tower Defense 29.4%, Aliens 14.8%, Space 11.1%, Building 9.8%, Post-apocalyptic 8.4%

Shatter genre boundaries in this sci-fi survival Roguelite blending bullet-hell action and base-building RTS. Dodge and unleash screen-clearing firepower against alien hordes, while constructing fortresses and real-time automated defenses to crush your enemies.

Why similar: Tower Defense 26.2%, Bullet Hell 24.4%, Space 19.8%, Sci-fi 10.7%, Shooter 9.2%

Tau Cubis is a mazing tower defense game set in colorful sci-fi landscapes. Use your strategic skills to overcome numerous challenges and advance through the leaderboards.

Why similar: Tower Defense 35%, Space 16.2%, Strategy 15.8%, Sci-fi 12.1%, Futuristic 7%

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 32.7%, Aliens 17.1%, Space 14.5%, Sci-fi 12.1%, Strategy 9.5%

Starfall Defenders is a classic tower defense game that features unique towers and enemies. It also has an in-game shop system that allows players to purchase better towers, upgrade existing ones, and buy special items like the Atom Bomb, Splash Bomb, and Air Supply.

Why similar: Tower Defense 33.8%, Space 17.4%, Strategy 14.6%, Aliens 12.9%, Futuristic 6.2%

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 29.6%, Automation 25.8%, Bullet Hell 21.2%, Strategy 7.5%, Tactical 7.2%

Defend a salvaged power core with linked tower networks on handcrafted scrapyard maps.

Why similar: Tower Defense 48.5%, Strategy 19.3%, Sci-fi 13.3%, Robots 8.6%, Tactical 7.6%

On an alien world, you must defend yourself in this unique base-building tower-defense game. Build a base by placing blocks, turrets and traps in order to survive the hoards of aliens.

Why similar: Tower Defense 34%, Aliens 16.8%, Strategy 11.8%, Space 11%, Building 9.6%

A strategic fusion of automation game and tower defense

Why similar: Tower Defense 26.6%, Automation 26%, Post-apocalyptic 9.4%, Strategy 8.7%, Sci-fi 7.8%

Survive the waves. Build towers. Upgrade everything. Fight alongside your defences. Enemies escalate. Chaos builds. Power grows. Start small. End unstoppable.

Why similar: Tower Defense 28.9%, Automation 18%, Post-apocalyptic 10.2%, Sci-fi 8.5%, Strategy 8.4%