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Games Like Galactic Siege

60+ similar titles based on shared tags and player behavior. Themes include Strategy, Tower Defense, Singleplayer, Indie.

Galactic Siege header art

Defend your base across four unique worlds in this 3D tower defense game. Battle waves of monsters, conquer 20 campaign levels, and climb the global leaderboard in the endless mode.

Reviews: 1 user reviews — 100% — of 1 reviews
Released: 2025-11-06
Developer: 2MGames
Genres: Action, Indie, Strategy
Platforms: Windows

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  1. #1 ASCII Tower Defense
    97% match6 user reviews83% of 6 reviews2024
    Dev: David Segal Games
    Windows

    Wave after wave of enemy shapes are looking to break through your defenses and ravage the land of Language. Build your defenses, all made of ASCII characters, to repel the invaders!

    Why similar: Tower Defense 54.1%, Strategy 23%, PvE 21.9%, Singleplayer 1.1%

  2. #2 シーモンタウンTDふたつの魔法の杖と危険すぎた追跡
    96% matchNo user reviews2025
    Dev: SiemonTown
    Windows

    Defend against the oncoming ice army! Summon spirits with Shugu's magical wand to repel enemies before they reach your defense line. Use only the left mouse button to control. Feel free to share your gameplay on any social media or video platform.

    Why similar: Tower Defense 40.6%, Strategy 24.4%, PvE 16.1%, Magic 14%, 3D 4.3%

  3. #3 Zenatria
    96% matchNo user reviews
    Dev: KC Embers
    Windows

    It's time to answer the call, go into battle against the forces of Yurmim to defend the town from the onslaught of enemies.

    Why similar: Tower Defense 47.8%, Strategy 21.1%, PvE 19.6%, Magic 9.8%, Indie 1%

  4. #4 Space Run
    95% 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 59.6%, Strategy 16.4%, Space 15.7%, Sci-fi 5.9%, Indie 1.5%

  5. #5 Alpha Ceti TD
    94% matchNo user reviews
    Dev: Alpha DevelopmentPub: HASH CLASH
    Windows · Linux

    Classic Tower Defense meets space exploration. Build turrets on mining platforms, harvest enemies to build more defenses, and mine Dark Energy to travel the stars. As a sentient AI, you must upgrade your tech, scan planets, and find a new home for humanity before Earth fades away.

    Why similar: Tower Defense 33.5%, Strategy 15.6%, PvE 14.8%, Management 7.4%, Space 6.2%

  6. #6 We Are the Universe
    94% match1 user reviews100% of 1 reviews2023
    Dev: Uncle Grouch Gaming
    Windows

    Sci-fi tower defense where you create your own maze, manage drones and power levels, and harvest for resources. Upgrade your turrets, buildings and ground units. Upgrade and buy new vehicles and motherships.

    Why similar: Tower Defense 53.9%, Strategy 21.1%, Sci-fi 13%, 3D 8.5%, Indie 2.1%

  7. #7 Z-APE: Tower Defense
    93% match9 user reviews67% of 9 reviews2024
    Dev: Neon Nova Games
    Windows · Mac

    Z-Ape is a unique tower defense and first person shooter mash up game. Hordes of enemies attacking your base, it's up to you to stop them by placing towers or fighting them on FPS mode with guns, or both!

    Why similar: Tower Defense 45.2%, Strategy 27.2%, PvE 18%, 3D 7.3%, Indie 1.3%

  8. #8 Space Run Galaxy
    92% matchMixed64% of 1,027 reviews2016
    Dev: Passtech GamesPub: Focus Entertainment
    Windows
    Median: 3.3 hrsMean: 5.3 hrs≥1hr: 92%

    Space Run Galaxy is the sequel to Space Run, the game from one-man studio Passtech, which seduced hundreds of thousands of players with its dynamic and original gameplay. By twisting the tower-defense game style, Space Run offered an addictive real-time spaceship construction strategy experience.

    Why similar: Tower Defense 56.7%, Strategy 27.4%, Space 13%, Indie 2.8%

  9. #9 Tiles and Towers TD
    91% matchMostly Positive79% of 28 reviews2022
    Dev: Max Ritters
    Windows

    A 3D tower defense where not only the towers matters but also the ground that alters the towers. Spiced up with randomized wave modifications, skilltree, unique towers and spells. Voila! You get Tiles and Towers TD!

    Why similar: Tower Defense 52%, Strategy 24.2%, Magic 15.3%, 3D 7.3%, Singleplayer 1.2%

  10. #10 Street Clean TD
    91% match1 user reviews100% of 1 reviews2024
    Dev: Extrototert
    Windows · Mac

    Protect the streets from the living trash.

    Why similar: Tower Defense 48.9%, Strategy 21.5%, PvE 20.1%, Management 7.8%, Indie 1.1%

  11. #11 Harvest: Massive Encounter
    90% 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 63.5%, Strategy 26.1%, Sci-fi 6.3%, Indie 3.4%, Singleplayer 0.7%

  12. #12 Unstoppable Gorg
    89% 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 70.9%, Strategy 15.9%, Sci-fi 5.7%, Space 4%, Action 1.8%

  13. #13 Anomaly Defenders
    89% 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 64.8%, Strategy 25.5%, Action 3.7%, Sci-fi 3.4%, Indie 2.6%

  14. #14 Autothysis
    88% matchNo user reviews
    Dev: Somniare Studios
    Windows · Mac

    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 35.8%, Strategy 12.2%, Space 8.8%, Survival 8.4%, Sci-fi 7.9%

  15. #15 Gemstone Defense
    87% match7 user reviews100% of 7 reviews2021
    Dev: Thrasosoft
    Windows · Mac

    A casual single player maze-based tower defense game. Build the best maze and discover the strongest towers, if you can.

    Why similar: Tower Defense 52.6%, PvE 20.5%, Strategy 20.2%, 3D 6.2%, Singleplayer 0.5%

  16. #16 CrystalKeepers Tower Defense
    86% matchNo user reviews
    Dev: MacGGames
    Windows

    Immerse yourself in an epic yet whimsical journey to defend the crystals from hordes of enemies, each more broken-down than the next, with a whole arsenal of tricks! Fight on the plains, mountains, swamps, deserts and many others by adapting your strategy.

    Why similar: Tower Defense 55.5%, Strategy 26.3%, Resource Management 9.8%, 3D 7%, Singleplayer 1.4%

  17. #17 Unknown TD
    86% match3 user reviews75% of 3 reviews2025
    Dev: KNdev
    Windows

    Unknown TD is a fun, semi-casual Tower defense game, with plenty of towers, maps and other interesting stuff for the player to interact with!

    Why similar: Tower Defense 49.2%, Strategy 21.6%, PvE 20.3%, Management 7.3%, Indie 1.1%

  18. #18 Defense Grid: The Awakening
    85% 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 74.9%, Strategy 14.1%, Sci-fi 6.6%, Futuristic 2.3%, Indie 1.3%

  19. #19 AntiVirus
    84% match3 user reviews67% of 3 reviews2025
    Dev: Brain Juice
    Windows

    Defend the CPU of your computer from the waves of virus invasions in this pixel-art tower defense game!

    Why similar: Tower Defense 50.3%, Strategy 20.8%, PvE 11.9%, Management 7.2%, Sci-fi 4.3%

  20. #20 Sentinel 3: Homeworld
    84% 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 76.9%, Strategy 17.3%, Sci-fi 4%, Indie 1.9%

  21. #21 Portal Sentinels
    83% matchNo user reviews2026
    Dev: Astrow Games
    Windows · Linux

    Portal Sentinels is a pixel-art, grid-based tower defense blending labyrinthine strategy and rich tower evolution. Play solo or with friends to thin out the army of the void before the horde reaches its destination.

    Why similar: Tower Defense 40.7%, Strategy 22.3%, PvE 18%, Magic 10.2%, Base Building 8.3%

  22. #22 BYTES: The Reverse Tower Defense
    82% match7 user reviews86% of 7 reviews2024
    Dev: Icy Soul Studios
    Windows

    BYTES:T.R.T.D is a twist on the classic Tower Defense formula. Build your own path to the exit and use special tiles to keep your Bytes safe against a dynamic AI that tries to counter your actions.

    Why similar: Tower Defense 46.5%, Strategy 27.2%, Futuristic 10.8%, Sci-fi 7.2%, 3D 6.9%

  23. #23 Full Manual Tower Defense
    80% matchPositive80% of 15 reviews2025
    Dev: Individual
    Windows

    3D Tower Defense! Run! Build it yourself! Connect power yourself! You should build your tower manually!

    Why similar: Tower Defense 44.8%, Strategy 26.1%, PvE 13.4%, Resource Management 7.1%, 3D 6.7%

  24. #24 Holy Towers
    81% match8 user reviews38% of 8 reviews2018
    Dev: PlayFlock Two
    Windows

    Defeat hordes of imps in the very first Tower Defence game about the order of monks! All this to defend humankind from hordes of demons!

    Why similar: Tower Defense 66.7%, Strategy 33.3%

  25. #25 Stellar Infestation
    79% match6 user reviews83% of 6 reviews2025
    Dev: YogurtGames
    Windows

    Dig minerals, manufacture ammunition, and build defense towers to fend off swarms of insects. A tower defense game with light production line elements.

    Why similar: Tower Defense 38.9%, Strategy 22.3%, Sci-fi 9.1%, Resource Management 9.1%, Space 8.4%

  26. #26 Rush for Glory
    81% 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 69.7%, Strategy 26.5%, Action 3.8%

  27. #27 Pathogen Purge - Tower Defense
    79% match6 user reviews50% of 6 reviews2023
    Dev: Maverick
    Windows

    Pathogen Purge is a thrilling microbiological tower defense game, combining strategy and action as players become Nanobot Guardians defending the human body against relentless germs and viruses.

    Why similar: Tower Defense 49.6%, Strategy 20.9%, PvE 20.2%, 3D 5.7%, Action 1.5%

  28. #28 Selknam Defense
    78% matchMixed42% of 57 reviews2014
    Windows · Mac
    Median: 30 minMean: 1.7 hrs≥1hr: 33%

    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 66%, Strategy 27.6%, Indie 3.8%, Action 2.6%

  29. #29 Defense Zone
    78% matchVery Positive83% of 83 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 69.7%, Strategy 27%, Indie 3.3%

  30. #30 Alien Worms Invasion
    77% matchMixed69% of 26 reviews2018
    Dev: Mímir Studio
    Windows

    Alien Worms Invasion is a game of futuristic exploration and tower defense. In the game, you can explore unknown areas and build bases and units to defense the attack of the worms which would be killed in the end。

    Why similar: Tower Defense 52.8%, Strategy 29.8%, Survival 11.5%, Indie 4.4%, Singleplayer 1.5%

  31. #31 Fantasy Tower Defense
    76% match1 user reviews100% of 1 reviews2025
    Dev: Ktisis Games
    Windows

    Fantasy Tower Defense is a challenging, fast-paced, and strategic Tower Defense game where you frantically build towers, cast spells, and upgrade to stop monsters from reaching your castle.

    Why similar: Tower Defense 55.8%, Strategy 33.9%, 3D 9%, Singleplayer 1.4%

  32. #32 Sole_BlockDefenders
    76% matchNo user reviews2026
    Dev: Sole_64
    Windows

    FPS Tower Defense where you fight hordes of blocks. Use differnet weapons, turrets and traps to build a strong defense and stop the enemy.

    Why similar: Tower Defense 53.5%, Strategy 23.8%, PvE 21.9%, Singleplayer 0.8%

  33. #33 War in a Box: Paper Tanks
    77% matchMostly Positive71% of 208 reviews2014
    Dev: DQ Team
    Windows · Mac · Linux
    Median: 42 minMean: 9.5 hrs≥1hr: 43%

    Build your towers of paper before they get out of the box and make a big mess in the room. Manage the turrets, upgrade and be careful where you put them... every decision can be fatal! Watch out for the air units, they have a different route!

    Why similar: Tower Defense 71.3%, Strategy 25.5%, Indie 3.2%

  34. #34 D.P.S: Weapons Testing Facility 2
    75% match4 user reviews100% of 4 reviews2025
    Dev: Cool Smithy Games
    Windows

    Find the best combinations of projectiles and components to create the ultimate weapon. Mutate and upgrade your components to create stronger weapons. Fight wave after wave of monsters to reach the top.

    Why similar: Tower Defense 45.4%, Strategy 26%, PvE 10%, Sci-fi 9.9%, Futuristic 8.3%

  35. #35 iBomber Defense
    75% matchMostly Positive74% of 244 reviews2011
    Dev: Cobra Mobile
    Windows · Mac
    Median: 1.3 hrsMean: 7.0 hrs≥1hr: 54%

    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 71.5%, Strategy 25.5%, Indie 3%

  36. #36 Rags to Liches
    74% matchPositive91% of 23 reviews2023
    Dev: Louis BuiPub: Neumont College of Computer Science
    Windows

    A small, third-person, action, tower defense game where you play as a peasant who gets tired of adventurers breaking into his house. Place down towers and fight off waves and waves of "enemies." Progress through the story and see just how far one man will go to protect his beloved llama.

    Why similar: Tower Defense 52.1%, Strategy 22.8%, PvE 12%, 3D 6.9%, Action 4.4%

  37. #37 Defense Zone 2
    74% matchVery Positive85% of 162 reviews2014
    Dev: Artem Kotov
    Windows · Mac · Linux

    Stunning detail of levels, in-depth gameplay, finely tuned balance of all levels and turrets. The new, engaging levels are even more stunning and impressive.

    Why similar: Tower Defense 74.2%, Strategy 23%, Indie 2.9%

  38. #38 ArcaneOutpost
    73% match4 user reviews100% of 4 reviews2024
    Dev: VortexRingGame
    Windows

    A strategy game that combines MOBA and Tower Defence, You would control guardians with different skills,building your outpost to fend off enemy attacks.

    Why similar: Tower Defense 41.1%, Strategy 23%, Magic 12.2%, Base Building 9.6%, Survival 5.1%

  39. #39 Florentum
    73% matchNo user reviews
    Dev: 3TK Games
    Windows

    This is a tower defence game that emphasizes decision making and strategy rather than fast reactions. Every choice you make impacts your overall progress, encouraging players to think carefully about how to prioritize their upgrades.

    Why similar: Tower Defense 48.2%, Strategy 20.9%, PvE 20.1%, Management 5.9%, Survival 3.6%

  40. #40 Dwarfare: All For The Forge
    71% match6 user reviews67% of 6 reviews2026
    Dev: Blanc Smith Studios
    Windows

    Be the dwarf you know you are! Build towers to protect the beacons and keep production in motion! Use your weapons to corner any enemies that scrape through. Do it- do it ALL FOR THE FORGE!!

    Why similar: Tower Defense 45.1%, PvE 17.6%, Strategy 17.6%, Management 7%, 3D 4.8%

  41. #41 Anomaly: Warzone Earth
    72% 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 49.6%, Strategy 34.5%, Sci-fi 9.1%, Action 3.1%, Indie 2.8%

  42. #42 Thukothea Defender
    73% match6 user reviews50% of 6 reviews2021
    Dev: DjokaGames
    Windows · Linux

    A strategic tower-defense where you control powerfull drones. Unlock new tower and use specific technologies to defend your base on Thukothea!

    Why similar: Tower Defense 54.5%, Strategy 17.7%, PvE 11.7%, Base Building 5.2%, Sci-fi 4.3%

  43. #43 Stonetowers
    72% match7 user reviews71% of 7 reviews2018
    Dev: Gareloch Games
    Windows

    Build and defend your burgeoning settlement in this town-building tower-defence hybrid. Guide your people as they unlock the secrets of the arcane and protect their new home from the otherworldly beings that surround it.

    Why similar: Tower Defense 42.2%, Strategy 38.9%, Base Building 9.7%, Survival 9.2%

  44. #44 Tower Defense Classic I
    71% matchNo user reviews
    Dev: Back Alley Studio
    Windows

    Design a tower maze and test your strategy against unique bosses and waves of enemies. TD Classic gives you complete control over not just the pathing of enemies through your tower placement but also the targeting behavior of your towers.

    Why similar: Tower Defense 53.7%, Strategy 25.3%, PvE 18.4%, Singleplayer 1.4%, Indie 1.2%

  45. #45 Astro company
    70% matchNo user reviews2026
    Dev: Elephant Arts
    Windows

    Defend your Core in an endless tower defense where every decision matters. Build too slow and you’re overrun. Build too fast and chaos breaks your defenses.

    Why similar: Tower Defense 39.9%, Strategy 17.7%, PvE 17.5%, Space 6.3%, Base Building 6.2%

  46. #46 Shad'O
    71% matchMixed55% of 127 reviews2012
    Dev: Okugi StudioPub: Okugi Sudio
    Windows
    Median: 2.0 hrsMean: 3.6 hrs≥1hr: 68%

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

    Why similar: Tower Defense 68.8%, Strategy 23.7%, Indie 3.9%, Action 3.6%

  47. #47 Bluevolution
    70% match4 user reviews100% of 4 reviews2020
    Dev: Johan Bägerfeldt
    Windows

    An incredible asteroid assault is about to begin! Take command of the planet's defenses and prevent extinction in this planetary Tower Defense game.

    Why similar: Tower Defense 42.5%, Strategy 39.2%, Space 15.1%, Indie 2%, Singleplayer 1.2%

  48. #48 Hold the Line
    69% matchNo user reviews2026
    Dev: Adrien De Nève
    Windows

    A strategic tower defense set in World War I. Defend Belgian trenches, manage your soldiers, their supplies and fatigue. Every choice matters. This is not about conquering — it’s about holding the line.

    Why similar: Tower Defense 51.8%, Strategy 24.3%, Management 15.6%, Resource Management 7.5%, Singleplayer 0.7%

  49. #49 SynthWaves
    69% match8 user reviews75% of 8 reviews2022
    Dev: Bosskiller Studios
    Windows

    A retrowave tower defense game where the player must manage their arsenal of sentries to fight off waves of synths, stop their invasion, and take the fight to their home.

    Why similar: Tower Defense 49.2%, Strategy 21.8%, PvE 11.6%, Futuristic 10.9%, 3D 4.7%

  50. #50 Space Base
    67% match3 user reviews100% of 3 reviews2025
    Dev: FishBaitPub: PondDev
    Windows

    Space Base is an action-packed tower defence game, where you aim to protect your planets from the incoming forces of enemy ships and aliens by any means necessary. Build up your defences as stronger and stronger waves of enemies arrive to reach the highest score possible.

    Why similar: Tower Defense 43%, PvE 22.5%, Strategy 17.1%, Base Building 8.4%, Space 7.5%

  51. #51 Light Towers
    67% match4 user reviews100% of 4 reviews2024
    Dev: Ion Rodriguez
    Windows · Mac

    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 49.3%, Strategy 20.4%, Management 7.8%, PvE 7%, Sci-fi 4.7%

  52. #52 Anomaly 2
    68% matchMostly Positive79% of 1,055 reviews2013
    Dev: 11 bit studios
    Windows · Mac · Linux
    Median: 2.5 hrsMean: 4.7 hrs≥1hr: 77%

    Anomaly 2 is a sequel to the critically acclaimed Anomaly Warzone Earth. Maintaining the core elements of the original, Anomaly 2 adds plenty of new features: unit morphing, over million tactical combinations, post-apo world and tower defense vs tower offense multiplayer mode.

    Why similar: Tower Defense 51.9%, Strategy 32.8%, Sci-fi 7.2%, Action 4.2%, Indie 3.2%

  53. #53 M.A.C.E. Tower Defense
    69% 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 51.1%, Strategy 31.7%, Sci-fi 7.5%, Action 5.6%, Indie 4.2%

  54. #54 Peep Invasion
    68% match4 user reviews75% of 4 reviews2022
    Dev: Poema Games
    Windows

    Forge your team from a variety of different creatures, each with their own strengths and abilities, and stop the never-ending invasion of Peeps!

    Why similar: Tower Defense 55.2%, Strategy 22.6%, Magic 11.6%, 3D 7.8%, Singleplayer 1.5%

  55. #55 Wrath of Towers
    67% matchPositive83% of 12 reviews2024
    Dev: Phoenixxx Games
    Windows

    In this game, your task will be to create a reliable defense that can withstand the onslaught of enemies. You will have to build various towers that will help you hold back the enemy advance.

    Why similar: Tower Defense 47.1%, Strategy 31.2%, Survival 13.4%, 3D 7.5%, Singleplayer 0.9%

  56. #56 Celestial Wardens
    68% matchNo user reviews2025
    Dev: Crimson Mantis Interactive
    Windows

    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 44.3%, Strategy 15.5%, Management 13.7%, Space 12%, Sci-fi 5.2%

  57. #57 Asteroid Core
    66% matchMixed67% of 39 reviews2024
    Dev: JOZGamerPub: JOZGames
    Windows

    You are isolated on a small meteor and need to build a fire to escape before being destroyed by aliens. Use your limited space to create machines and obtain more and more resources. Enjoy this mix of puzzles, tower defense and incremental gameplay.

    Why similar: Tower Defense 37.3%, PvE 16%, Strategy 11.6%, Management 9.8%, Space 9.6%

  58. #58 Crossite II Definitive Edition
    65% match7 user reviews100% of 7 reviews2025
    Dev: AL Studios
    Windows · Linux

    Futuristic Tower Defense Action! All out war between You and Crossite vs. Erossite. Use Strategy to place down towers and defend from Erossite enemies. Equip Flash Drives to give yourself an edge above enemies. Solve puzzles to help Crossite locate enemy bases.

    Why similar: Tower Defense 49.8%, Strategy 22.7%, PvE 16.6%, Futuristic 7.6%, Action 2.7%

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Games Like Galactic Siege

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