Sphere TD
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About Sphere TD
Sphere TD is a tower defense game about defending Earth-25 from invading spheres. You build every tower yourself, then modify towers and projectiles to send attacks along the spheres’ path. You can split, add, bounce, chain or multiply projectiles, and choose how to develop your defenses.
Build and modify towers
The game has 39 towers with distinct layouts and functions. You manage tower inventory and energy, mine ores, earn gold and use resources for research and crafting. Its 33 mods each have tiers, MK upgrades, a B-Side function and three unique perks; ModCards can provide boosts to your base or drone tower. The many combinations support more than a million possible builds.
Progress through the maps
Sphere TD includes 50 hand-crafted levels, endless mode and map-specific challenges. Its world map has 52,000 nodes and procedurally generated setups. After each action, you can review your results and build more towers; long-term progression includes research and advanced mod crafting.
Play and progression
You can play offline, while online features include cloud sync and leaderboards. The game also supports cross-platform play between desktop and mobile.
Frequently asked questions
The best price for Sphere TD is $1.55 at Kinguin. That is 88% less than on Steam, where it costs $13.99. 2 shops have an offer that activates in your country.
Some are. This page only shows offers that activate in your country; offers for other regions, or with no stated region, are left out. To see the offers for another country, change your country at the top of the page.
Every key we list activates on Steam. Redeem the key there and Sphere TD stays in your library for good.
Yes, with a small risk. Publishers create keys to sell in other shops, which is why a key can cost less than in the official store, and once you activate it the game is yours to keep, just like a store purchase. On average 1–2% of keys fail, so check the shop's buyer protection before you buy: the official store does not refund keys bought elsewhere.
The minimum requirements for Sphere TD are: Windows 10, GeForce GTX 750 Ti, Intel Core i3-6100, 4 GB RAM, 1 GB storage. It runs on Windows only. The recommended specs are in the System requirements section.
No. Sphere TD is a single-player game.
Mostly, yes. Valve rates Sphere TD as Playable on the Steam Deck: it runs, but may need some manual setup.
Buy Sphere TD 88% cheaper than on Steam.
Sphere TD is available for 88% less in shops such as Kinguin.
Steam lets publishers create keys to sell in other shops. Once you activate a key, the game is yours to keep, just like a store purchase.
Disclaimer: CD keys have an inherent 1–2% average failure rate. Check the shop terms for buyer protection info. Steam offers no buyer protection for keys bought in other shops and doesn't refund them.
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