# GeminiDefense — Epic Sci-Fi Tower Defense

> Epic Sci-Fi Tower Defense (iPhone/iPad app by Blue Rain.)

- Source: https://appshunter.io/ios/app/geminidefense/id6815485390 (this page in markdown: same URL + `.md`)
- Developer: [Blue Rain](https://appshunter.io/developer/373016486)
- Category: Games, Strategy
- Price: Free with in-app purchases
- Age rating: 17+
- Requires: iOS 15.0 · 357 MB
- Languages: American English
- Released: 2026-10-05
- Data updated: 2026-10-08
- User reviews in markdown: https://appshunter.io/ios/app/geminidefense/id6815485390/reviews.md

## What is GeminiDefense?

Nine planets under siege. One defense line stands between invasion and extinction.

Gemini Defense is a sci-fi tower defense game where your battlefield layout shapes the fight. Build a maze, combine specialized towers, and hold your ground against alien swarms and planetary bosses.

BUILD YOUR OWN DEFENSE
Place towers between waves to shape enemy routes while keeping a path open. Balance firepower, crowd control, and protection before the next assault begins.

CREATE YOUR ARSENAL
Combine cannons, sustained lasers, freezing shots, flamethrowers, sniper fire, and explosive missiles. Complete the free shield briefing to unlock the protective Holy Tower. Poison and Thunder towers are available through their respective difficulty expansions.

EVOLVE WITH PURPOSE
Earn research stars by advancing through new campaign waves and securing victories. Develop towers across three evolution stages, or downgrade them to reclaim research points and try another strategy. Battlefield gold is used separately to deploy your defenses.

SURVIVE THE SWARM
Fight through 22 waves in each planetary campaign. Boss waves bring larger, faster enemy formations before the commander arrives. Enemy attacks can destroy your towers, so every position matters. Call in bomber support when the defense line is under pressure.

EARN YOUR WAY INTO ENDLESS
Complete all nine planetary campaigns on Void difficulty to unlock Endless mode on a larger battlefield. Face enemies from across the system, expanding portal threats, and multiple bosses with independent abilities.

FREE TRIAL AND OPTIONAL EXPANSIONS
Play the first two planets on Normal difficulty for free.
The Campaign Expansion provides access to planets 3-9, which unlock through campaign progression.
The Fel Expansion unlocks Fel difficulty and the Poison Tower.
The Void Expansion unlocks Void difficulty and the Thunder Tower.
Fel and Void do not include the Campaign Expansion. Access to planets 3-9 requires it separately. Endless mode also requires completing all nine campaigns on Void difficulty.

No game account registration is required. Progress is saved locally on your device. Purchases can be restored through Settings > PLAYER > RESTORE PURCHASES; restoring purchases does not restore gameplay progress.

English is the default language, with 16 language options available in Settings.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Campaign: Sectors 3-9 | $2.99 | one-time |
| Fel + Poison Tower | $1.99 | one-time |
| Void + Thunder Tower | $1.99 | one-time |



## Version history (last 2 releases)

### 1.1 — 2026-10-06

What’s New in Version 1.1

• Added a startup loading screen with progress indicators.
• Added a step-by-step tutorial for selecting towers, placing defenses, and starting your first wave.
• Added swipe scrolling and smoother navigation in Tower Lab.
• Updated the Start button icon for clearer battle controls.

### 1.0 — 2026-10-05

No release notes.

## More apps by Blue Rain

- [Next 5](https://appshunter.io/ios/app/next-5/id6752849995)
- [平安无事](https://appshunter.io/ios/app/id6758050746)
- [GeminiDefense](https://appshunter.io/ios/app/geminidefense/id6761719774)

All apps by Blue Rain: https://appshunter.io/developer/373016486

## Related topics

[geminidefense](https://appshunter.io/ios/topics/geminidefense)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-08.*