Avg. rating
—
Reviews
0
Sphere TD is an RPG tower defense game that combines strategic base defense with deep tower and projectile customization. Players build and upgrade towers, modify projectile behavior through a wide range of systems, and progress through handcrafted stages, endless mode, and a large world map. The game emphasizes experimentation, long-term progression, and replayability through its buildcraft, resource management, and progression systems.
Android · Oct 1, 2025
Worldwide · Exact date · Early access · IGDB
iOS · Oct 1, 2025
Worldwide · Exact date · Early access · IGDB
Android · Jan 20, 2026
Worldwide · Exact date · Full release · IGDB
iOS · Jan 27, 2026
Worldwide · Exact date · Full release · IGDB
PC (Microsoft Windows) · Jun 24, 2026
Worldwide · Exact date · Early access · IGDB
Catalog sources
36 achievements available.

Apply the Advanced Crafting Matrix to mods. Please remember that the quantum probability board does not accept legal complaints.
LockedSteam

Unlock the Base panel. You are now trusted with the shield grid, the reactor feed, and several buttons labeled do not touch.
LockedSteam

Survive ten minutes in one endless session. The spheres were not expecting you to still be here. Neither, frankly, was the duty officer.
LockedSteam

Survive thirty minutes in one endless session. Congratulations. You are now the longest-serving cadet in continuous contact with the enemy.
LockedSteam

Survive one hour in one endless session. The spheres kept coming, but your replacements never arrived. Thankfully, your coffee ration did.
LockedSteam

Survive two hours in one endless session. Your post has been reclassified from forward deployment to trench warfare.
LockedSteam

Survive three hours in one endless session. Command has stopped asking when this will be over. They just labeled your zone 'do not disturb'.
LockedSteam

Max out a mod tier. This is what greatness looks like right before the casing blows off.
LockedSteam

Unlock research tier one. You are now authorized to view the starter blueprints. The lab team has moved their personal mugs to a higher shelf.
LockedSteam

Unlock research tier two. Splitter mods are now legal in your hands, which prompted a controversial meeting at HQ.
LockedSteam

Unlock research tier three. Your designs are now filed under aggressive innovation instead of incident report.
LockedSteam

Unlock research tier four. Terminal-grade hardware is approved, and the safety officer has started avoiding eye contact.
LockedSteam

Unlock research tier five. Complete blueprint clearance granted. If a portal opens, act surprised.
LockedSteam

Destroy one thousand spheres. For a Temporary Cadet, this counts as a stable start.
LockedSteam

Destroy one billion spheres. The defense budget of the next decade has been replaced with a sticky note on your desk that reads: 'Do whatever.'
LockedSteam

Destroy ten thousand spheres. The local pile of scrap metal now has its own postal code.
LockedSteam

Destroy one hundred thousand spheres. We asked a quantum supercomputer to calculate your ammunition usage. It began to smoke.
LockedSteam

Destroy five hundred thousand spheres. Environmental surveys now list your lane as a distinct biome.
LockedSteam

Destroy one million spheres. High Command has quietly renamed your sector to the Exclusion Zone.
LockedSteam

Destroy five million spheres. At this density, the wreckage is starting to generate its own minor gravitational pull.
LockedSteam

Destroy ten million spheres. You have officially shattered the record previously held by an active planetary supervolcano.
LockedSteam

Destroy fifty million spheres. Strategic Command no longer tracks enemy formations. They track whether you are awake.
LockedSteam

Destroy two hundred and fifty million spheres. The spheres spent three eons traveling from the edge of the galaxy just to end up as your roof tiling.
LockedSteam

Complete the main tutorial. The Academy is thrilled you stopped aiming at your own infrastructure.
LockedSteam

Complete Galatium Command HQ world node. The first node on Earth-25, cleared by every cadet as a starter assignment. A surprising number of them are still here.
LockedSteam

Complete Tier 915 world node. Other cadets file mission reports. You file highlight reels.
LockedSteam

Complete Tier 1022 world node. Most cadets clear nodes. You clear nodes and have started assigning sphere names and narrating your own missions during debrief.
LockedSteam

Complete Tier 1110 world node. You pushed all the way to the corner of Earth-25. There is nothing further to reach. The next wave, however, has already been dispatched.
LockedSteam

Complete Tier 390 world node. Most cadets at this depth are reconsidering their life choices. You are reconsidering your tower spacing.
LockedSteam

Complete Tier 422 world node. You have no idea where HQ is from here, but you have a very clear idea of where your next node is.
LockedSteam

Complete Tier 447 world node. At some point the map stopped being a mission and became a lifestyle.
LockedSteam

Complete Tier 627 world node. Junior Cadet, Senior Cadet, Specialist Cadet. The title is temporary, but the cadet is here to stay.
LockedSteam

Complete Tier 622 world node. Your tower build violates four Academy guidelines and at least one law of physics, but the spheres died anyway.
LockedSteam

Complete Tier 626 world node. At some point the paperwork required to track how many spheres you destroy exceeded the paperwork required to deploy an entire squadron.
LockedSteam

Complete Tier 706 world node. Your solo campaign has been so successful that you have started to wonder if you are the only cadet on Earth-25.
LockedSteam

Complete Tier 868 world node. New recruits are briefed on standard procedures, tactical approaches, emergency protocols, and you specifically.
LockedSteam
Community notes