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Gemini: Space Tower Defense

Epic Sci-Fi Tower Defense
Blue Rain · Games
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App info

Developer
Blue Rain
Category
Games, Strategy
Released
Oct 5, 2026
Version
1.3 (Oct 22, 2026)
Price
Free
Size
653.0 MB
Requires
iOS 15.0
Age rating
16+
Languages
English

In-app purchases

Void + Thunder Tower$1.99
Fel + Poison Tower$1.99
Campaign: Sectors 3-9$2.99
Current prices, App Store US.
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About Gemini: Space Tower Defense

Build your last line of defense against an alien invasion. Gemini is a sci-fi tower defense game where placement, weapon combinations, and upgrade choices shape every battle. PLAN YOUR DEFENSE Spend battle gold to deploy towers before each wave. Combine laser fire, freezing shots, flames, sniper rounds, and missiles to hold back advancing enemies. EVOLVE YOUR ARSENAL Use earned score in Tower Lab to improve your towers. Adjust your upgrades and combine different weapons for the threats ahead. Zoom in on the action and choose when to call air support. FACE THE INVASION The full campaign spans nine planetary sectors with distinct terrain, enemy abilities, and powerful bosses. FREE TRIAL AND OPTIONAL PURCHASES Play sectors 1–2 on Normal difficulty free. A separate one-time campaign purchase unlocks access to sectors 3–9, with sequential progression still required. Fel difficulty with the…
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