Idle Planet Defender

Contains adsIn-app purchases
Content rating
Everyone
10+
Downloads
Content rating
Everyone
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About this game

🌍 GET READY. EARTH NEEDS YOU.
An alien invasion has reached Earth. Fortunately, humanity has prepared the only reasonable response: An unreasonable amount of firepower.
Welcome to Idle Planet Defender — an idle strategy and space defense game where you defend Earth, destroy alien fleets, upgrade powerful weapons, unlock powerful research upgrades and features, and fight many different alien forces across the galaxy...
The aliens brought a fleet. We brought weapons.

🛡️ BUILD THE PLANETARY DEFENSE GRID
Turn Earth into the most heavily armed planet in the galaxy.
Deploy and upgrade Tesla weapons, heavy cannons, scatter guns, orbital weapons, satellites, combat drones, cryogenic technology, chain lightning and several weapons that probably should not have passed safety testing.
Then activate your Ultimate Weapons. Stop time. Open a black hole. Turn enemy airspace into a regrettable life decision.

🧪 RESEARCH. UPGRADE. OVERKILL.
Unlock 90+ research nodes and continuously improve your defense grid with powerful upgrades, systems and enhancements.
Increase your firepower. Strengthen your economy. Unlock new technology. Build better weapons.
Everything you unlock stays with you. Human progress is permanent. The aliens, less so.

👽 50 ENEMY SHIPS. 50 MASSIVE BOSSES.
Fight 50 different alien ship classes with unique threats, defenses and increasingly questionable amounts of armor.
Crack their shields. Destroy their armor. Watch massive warships fall apart above the planet they made the administrative mistake of invading.
They have numbers. You have boom. Do the math.

🌍 DEFEND MORE THAN EARTH
Earth is only the beginning.
Expand your planetary defense operation across new worlds including Mars, Inferno, frozen planets, storm-covered worlds and other locations humanity discovered and immediately decided needed guns.
Claim them. Upgrade them. Defend them.

🤖 THE DEFENSE GRID NEVER STOPS
Your automated weapons attack incoming enemies while you focus on strategy, research and upgrades.
Optimize your build. Grow stronger. Destroy bigger fleets. Then prepare for the next invasion.

🏆 CLIMB THE RANKINGS
Complete daily missions, collect supply drops, spin the Stellar Wheel, earn rewards, progress through the Milestone Pass and climb the global rankings.
Somewhere in the galaxy, another commander thinks their defense grid is better than yours. Prove them wrong.
Idle tower defense meets arcade action, survive endless alien waves. 👾
Updated on
Sep 6, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • This app may share these data types with third parties
    Location and Device or other IDs
  • This app may collect these data types
    Location, Personal info and 5 others
  • Data is encrypted in transit
  • You can request that data be deleted

What’s new

Idle Planet Defender — idle tower defense in orbit.

Endless waves of UFOs are closing in on Earth. Upgrade your planet's defenses, unlock new worlds, and keep earning while you're away.

• Research lab, workshop and cards
• Miner drones, missions and live events
• Prize wheel and daily rewards

Hit a bug or something that feels unfair? Tell us — we read every message.