Sphere TD: Build & Mod Towers

Contains adsIn-app purchases
116 reviews
Content rating
Everyone
10K+
Downloads
Content rating
Everyone
In-Game Purchases
Learn more
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About this game

Sphere TD is a tower defense game with one difference: there are no preset towers. You build every tower yourself by combining mods to spam more projectiles.

UNIQUE FEATURES

- Build & mod every tower. There are no preset towers.
- Defend each map with 5 towers. Max them out and spam more projectiles.
- Split your shots, bounce, multiply, shock, burn. The build is up to you.
- Your base can fly, towers and all. Explore the maps and mine ores.
- Research and craft mods. Just don't run out of energy.

WHAT IS IN THE GAME

- 41 towers, each with its own grid layout and function
- 33 mods, each with tiers, MK upgrades, a B-Side function, and 3 perks, for over a million tower builds
- 50 hand-crafted maps with three objectives each
- Endless mode after map 50, plus map-specific challenges
- A research tree, mod crafting, and a trader
- Spheres that scale into elites, bosses, armored, shielded, cloaked and flying
- Offline play, with cloud sync and leaderboards
- Cross platform: mobile and desktop

NO NONSENSE

No pay to win. No time gates. No paywalls. No ad spam. No loot boxes. Funding the Galatium Academy is appreciated, never required.

MESSAGE FROM THE DEV

Hi, I'm Alex, a solo developer, and Sphere TD is my first game. If you like tower defense and building your own towers, you should feel right at home. Come discuss tower builds with other friendly cadets on Discord. I am committed to 10 years of support. You want it, I'll make it.

Ready to join the Galatium Academy?
Defend your base with 5 outrageously modded towers!
Updated on
Oct 2, 2026
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Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • No data shared with third parties
    Learn more about how developers declare sharing
  • This app may collect these data types
    App activity and Device or other IDs
  • Data is encrypted in transit
  • You can request that data be deleted

Ratings and reviews

113 reviews
Solivagant M
August 30, 2026
you have to figure a few things out for yourself, but its complex and engaging while you do it. Though i dont see the point of remaining docked? anyway fantastic game, its math with lasers. A bit of tactical game play with a steep and rewarding learning curve, best of all, a distinct and noticable lack of ads, im waiting until i get further to buy a pack, but definitely worthy of investment if youre going to give a game your money, it should be this one.
1 person found this review helpful
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Standard Issue Games
September 5, 2026
Thank you for the review, really happy to see players enjoying my game :)
Mgsgta3
April 3, 2026
I want to start out by saying this game is exceptionally fun and challenging. While technically a tower defense game It's more about what you can come up with when building your towers(some towers have +50 mod slots and the different outcomes are pretty drastic(in a good way) only thing is that some of the crazier stuff doesn't seem to last too long before getting nerfed, and the crazy stuff is part of the fun so I'd really like to see a "fun/unranked" mode with less punishing mods or similar.
4 people found this review helpful
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Standard Issue Games
July 25, 2026
Apperciate the great review, glad to hear youre enjoying the deep tower modding. I was worried about it being too hard for mobile gaming. Yes and I'll leave in some crazy 'op' sphere smashing mechanics 😉
ThatBad DisplayName
July 26, 2026
I used to believe infinitoid 2 was the only great complex tower game on the google store platform, but this has changed my mind for the better. (I'm not saying one is better then the other, just that both are great tower defense games that I would recommend for those interested in the genre.)
1 person found this review helpful
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Standard Issue Games
July 27, 2026
Thanks apperciate your review 🫡 I also played lots of infinitode 2 many years ago. Great game

What’s new

- Removed endgame intro level.
- Minor cloud sync fix.