Circuit Defense Support

Build your defenses. Protect the reactor. Discover your next combo.

Circuit Defense is a procedural roguelite tower defense game for iPhone. Defend a central reactor, combine tower modules, survive changing enemy waves and unlock persistent core components.

Include your iPhone model, iOS version, app version and what happened. If helpful, include a screenshot and the level code from Run History. Please hide personal information. No logs or screenshots are sent automatically.

Getting started

1. Choose a starting tower and module, then place it on the mini-map.
2. Build and upgrade your defenses. Between waves, choose cards and combine modules.
3. Clear 10 waves to win. Finish or continue in Endless, where the field grows and more portals appear.
4. Configure up to three unlocked core components on the home screen to give future runs small bonuses.

Frequently asked questions

Do I need an account or internet?

No account is required. Gameplay works offline. Downloading updates, opening these pages, emailing support and using Apple’s rating prompt may require internet access.

How is progress saved?

Run history, favorites, discoveries, core components and fragments are stored locally on your iPhone. An active run is saved at stable boundaries. If the app closes during a wave, Continue restarts that wave from its beginning.

Where do core components and fragments come from?

Winning the 10-wave goal awards a seeded random core component once per run. It can unlock a component, upgrade it to Rare or award fragments for a duplicate. Spend earned fragments to craft or upgrade components. Fragments are game rewards, not real-money purchases.

What changes in Endless?

The field grows after waves 10, 20, 30 and 40, up to 16×16, with more tower positions. Beyond that, additional portals can appear every two waves while space remains. Pinch to zoom and drag to move the enlarged view.

Can I replay a level?

Yes. Replay from Run History; mark favorites to keep them easy to find. The same level code recreates its procedural content, while your choices and equipped core components can change the outcome.

Can I transfer progress to another device?

The current version has no game account or developer-operated cloud sync. Apple device backups are separate and depend on your settings. We cannot restore progress from our servers.

What happens if I delete the app?

Deleting the app removes its local progress. Offloading may retain data. Apple backups are managed separately. Consider your backup settings before deleting the app.

Are there ads, subscriptions or purchases?

The current version has no ads, subscriptions or in-app purchases. Any download price is displayed in the App Store.