IMHO.

Games like Sphere Invasion

If Sphere Invasion is your kind of game, the closest matches are AI War 2, Taur and Stronghold Crusader HD (2012) — picked from the ranked list below. Each pick is ranked by what players of this game also play, shared genres and tags, and review-mined similarity — not a generic popularity list.

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About Sphere Invasion: Sphere Invasion is Sci-Fi Tower Defence. Build your own road and defend it with 7 unique towers.

2020ActionStrategy5.99 USDWindowsby Space and Frogs
Sphere Invasion — Steam game cover

Players who liked Sphere Invasion also play

Steam players who put hours into Sphere Invasion also tend to own these titles — a signal called collaborative filtering. imho.run cross-references millions of library ownership patterns to surface games whose real audiences overlap, regardless of whether their genre tags match.

  1. AI War 2

    WHY THIS

    Top pick for Sphere Invasion fans by collaborative filtering across millions of Steam libraries. Shares Strategy with Sphere Invasion.

    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.

    2019StrategyIndieSimulation19.99 USDDeck PlayableSteam ↗
  2. Taur

    WHY THIS

    Second-strongest match for Sphere Invasion fans by collaborative filtering across millions of Steam libraries. Shares Action and Strategy with Sphere Invasion.

    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?

    2020ActionStrategyIndie24.99 USDDeck PlayableSteam ↗
  3. Stronghold Crusader HD (2012)

    WHY THIS

    Third-strongest match for Sphere Invasion fans by collaborative filtering across millions of Steam libraries. Shares Strategy with Sphere Invasion.

    The highly anticipated sequel to the best-selling Stronghold, Stronghold Crusader HD throws you into historic battles and castle sieges from the Crusades with fiendish AI opponents, new units, 4 historical campaigns and over 100 unique skirmish missions.

    2013StrategySimulation9.99 USDDeck PlayableSteam ↗
  4. Battlefleet Gothic: Armada (Classic)

    WHY THIS

    Ranked #4 for Sphere Invasion fans by collaborative filtering across millions of Steam libraries. Shares Strategy with Sphere Invasion.

    Battlefleet Gothic: Armada is the RTS videogame adaptation of Games Workshop’s classic tabletop game, pitting the Chaos, Imperium, Eldar, and Orks against each other in visceral space-battles.

    2016Strategy14.99 USDSteam ↗
  5. Total War: THREE KINGDOMS

    WHY THIS

    Ranked #5 for Sphere Invasion fans by collaborative filtering across millions of Steam libraries. Shares Action and Strategy with Sphere Invasion.

    Total War: THREE KINGDOMS is the first in the award-winning series to recreate epic conflict across ancient China. Combining a gripping turn-based campaign of empire-building & conquest with stunning real-time battles, THREE KINGDOMS redefines the series in an age of heroes & legends.

    2019ActionStrategy59.99 USDSteam ↗
  6. Company of Heroes

    WHY THIS

    Ranked #6 for Sphere Invasion fans by collaborative filtering across millions of Steam libraries. Shares Action and Strategy with Sphere Invasion.

    Delivering a visceral WWII gaming experience, Company of Heroes redefines RTS by bringing the sacrifice of heroic soldiers, war-ravaged environments, and dynamic battlefields to life. Please visit the "Company of Heroes - Legacy Edition" page for additional user reviews.

    2006ActionStrategy19.99 USDDeck PlayableSteam ↗
  7. Door Kickers 2: Task Force North

    WHY THIS

    Ranked #7 for Sphere Invasion fans by collaborative filtering across millions of Steam libraries. Shares Action and Strategy with Sphere Invasion.

    Command military Special Ops Teams in gripping tactical combat against a Middle East-based terrorist network. Sequel to RockPaperShotgun's "Best Tactics Game of 2014".

    2025ActionStrategyIndie24.99 USDDeck VerifiedSteam ↗
  8. Steel Division: Normandy 44

    WHY THIS

    Ranked #8 for Sphere Invasion fans by collaborative filtering across millions of Steam libraries. Shares Action and Strategy with Sphere Invasion.

    Steel Division: Normandy is a tactical real-time strategy (RTS) game that pits players against AI enemies in a single-player campaign -- or against several opponents in massive 10-on-10 multiplayer battles.

    2017ActionStrategySimulation19.99 USDDeck PlayableSteam ↗

Cheaper alternatives

Games in the same vein priced at least 40% below Sphere Invasion at current Steam store prices.

  1. POSTAL 2

    WHY THIS

    Priced ~83% under Sphere Invasion on Steam right now. Shares Action with Sphere Invasion.

    Live a week in the life of "The POSTAL Dude"; a hapless everyman just trying to check off some chores. Buying milk, returning an overdue library book, getting Gary Coleman's autograph, what could possibly go wrong?

    2012ActionIndieAdventure0.99 USDDeck VerifiedSteam ↗
  2. Buckshot Roulette

    WHY THIS

    Priced ~50% under Sphere Invasion on Steam right now. Shares Action with Sphere Invasion.

    Play Russian roulette with a 12-gauge shotgun. Four enter. One leaves. Roll the dice with your life. Good luck!

    2024ActionIndieSimulation2.99 USDDeck PlayableSteam ↗
  3. Blood and Bacon

    WHY THIS

    Priced ~83% under Sphere Invasion on Steam right now. Shares Action with Sphere Invasion.

    This Co-op Shooter , has Day and Night levels, multiple maps, players will take on 25 enemy types and numerous bosses, like Gargantuan Monsters and Minibosses every 10 days as you explore, shoot and run for your life against the onslaught of porcine monstrosities.

    2016ActionAdventureCasual0.99 USDSteam ↗
  4. Crypt of the NecroDancer

    WHY THIS

    Priced ~50% under Sphere Invasion on Steam right now. Shares Action with Sphere Invasion.

    Crypt of the NecroDancer is an award winning hardcore roguelike rhythm game. Move to the music and deliver beatdowns to the beat! Groove to the epic Danny Baranowsky soundtrack, or select songs from your own MP3 collection!

    2015ActionIndieRPG2.99 USDDeck VerifiedSteam ↗
  5. Super Hexagon

    WHY THIS

    Priced ~50% under Sphere Invasion on Steam right now. Shares Action with Sphere Invasion.

    Super Hexagon is a minimal action game by Terry Cavanagh, with music by Chipzel.

    2012ActionIndie2.99 USDDeck VerifiedSteam ↗
  6. Nodebuster

    WHY THIS

    Priced ~50% under Sphere Invasion on Steam right now. Shares Strategy with Sphere Invasion.

    Nodebuster is a short, experimental incremental game about busting nodes and destroying reality.

    2024StrategyIndieSimulation2.99 USDDeck PlayableSteam ↗
  7. STAR WARS™ Republic Commando™

    WHY THIS

    Priced ~58% under Sphere Invasion on Steam right now. Shares Action with Sphere Invasion.

    You are the leader of an elite squad of Republic Commandos, your mission is to infiltrate, dominate, and ultimately, annihilate the enemy. Your squad will follow your orders and your lead, working together as a team - instinctively, intelligently, instantly. You are their leader. They are your weapon.

    2009Action2.49 USDDeck PlayableSteam ↗
  8. shapez

    WHY THIS

    Priced ~83% under Sphere Invasion on Steam right now. Shares Strategy with Sphere Invasion.

    shapez is an easy-going, minimalistic factory building game about the automation of shapes through extraction and satisfying production lines. Adapt to increasingly complex shapes and grow your factory across an infinitely expanding map. Your only limitation is your creativity!

    2020StrategyIndieSimulation0.99 USDDeck PlayableSteam ↗

Free alternatives

Free-to-play games that recommended players of this title also tend to enjoy.

  1. Counter-Strike:Global Offensive

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action with Sphere Invasion.

    Counter-Strike:Global Offensive (CS:GO) expands upon the team-based action gameplay that it pioneered when it was launched over 2 decades ago. CS:GO features new maps, characters, weapons, and game modes, and delivers updated versions of the classic CS content (de_dust2, etc.).

    2012ActionFree To PlayFreeDeck PlayableSteam ↗
  2. The Lab

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it.

    Welcome to The Lab, a compilation of Valve’s room-scale VR experiments set in a pocket universe within Aperture Science. Fix a robot, defend a castle, adopt a mechanical dog, and more. Still not sold? It’s free!

    2016Free To PlayFreeSteam ↗
  3. DORONKO WANKO

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action with Sphere Invasion.

    『DORONKO WANKO』 is a DORONKO Action Game. In this game, You can become a cute, innocent Pomeranian, make your master's home messy and dirty. "Will the master be angry with me?" Don't worry. Because you are a sweet doggie.

    2024ActionSimulationFree To PlayFreeSteam ↗
  4. Landfall Archives

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action and Strategy with Sphere Invasion.

    Break into the Landfall Archives to steal and play previously unreleased games, demos, interactive slide shows, and even an unreleased version of Totally Accurate Battle Simulator from 2017!

    2023ActionStrategyIndieFreeSteam ↗
  5. Control, I'm Not Coming Back

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it.

    Control, I'm Not Coming Back is a short and emotional narrative game about a lost astronaut searching for a reason to keep going forward while facing the emptiness of space. Inspired by the Hopecore aesthetic, it’s a story about positivism, friendship and our human connection with Voyager 1.

    2026IndieAdventureFree To PlayFreeSteam ↗
  6. Outpath: First Journey

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it.

    Outpath: First Journey is a prologue chapter of the main game, Outpath. An experimental clicker base building game. Craft, gather & manage resources, build your base and buy more islands to exploit and expand!

    2022IndieAdventureCasualFreeDeck PlayableSteam ↗
  7. Epic Battle Fantasy 3

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it.

    Epic Battle Fantasy 3 is a silly turn-based JRPG, full of useless NPCs, rabid cats, childish humor, unreasonably large weapons, anime boobs, and other nonsense. And it's totally free!

    2016IndieAdventureRPGFreeDeck PlayableSteam ↗
  8. The Riftbreaker: Prologue

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action and Strategy with Sphere Invasion.

    The Riftbreaker: Prologue allows you to experience the events taking place before the story campaign of the main game. Explore an entirely new world. Gather resources. Build up a base. Defend yourself from thousands of alien creatures.

    2020ActionStrategyIndieFreeDeck PlayableSteam ↗

Frequently asked about Sphere Invasion

How much does Sphere Invasion cost?
Sphere Invasion is listed on Steam at 5.99 USD (current store price; Steam sales may reduce this temporarily).
What games are most similar to Sphere Invasion?
Based on Steam play patterns and shared genres/tags, the games most often recommended alongside Sphere Invasion are AI War 2, Taur, Stronghold Crusader HD (2012).
Who developed Sphere Invasion?
Sphere Invasion was developed by Space and Frogs.

imho.run ranks Steam game alternatives using a mix of collaborative filtering (ALS / iALS / EASE / LightGCN), content scoring over genres, categories, Steam tags, developers, and publishers, plus AI-extracted vibes mined from review text. The page above is generated in seed mode anchored on Sphere Invasion.

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