Idle Fortress Tower Defense

Contains adsIn-app purchases
5.86K reviews
Content rating
PEGI 7
1M+
Downloads
Content rating
PEGI 7
Fear
Learn more
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About this game

You will play as a lieutenant who upgrades the Fort stronger to fend off waves of monsters attacking in a rush.
Upgrade your strength, defense, fire rate and dozens of features to make your fortress even stronger.
After each time you resist the attacks of Alien Monsters, you will receive more Coins to upgrade in Battle and Gold to upgrade outside of the Workshop. In addition, when you reach higher levels, you can unlock more new features that make you stronger.

Game Features: - Many maps and many monsters with special skills.
- Cards that add features to the fortress.
- Laboratory with many strong research works.
- Rich upgrade system.
- Many useful support packages.
- Idle gifts help you to earn more resources without doing anything.
- Simulate the battle between the fortress and the alien monster.

Tip: - Focus on the Research Room to speed up the game and speed up the resource search.
- Increased firing distance and rate of fire will help the Fortress last longer thanks to its extraordinary power.

If you have any suggestions or questions, do not hesitate to contact us via email.
Let's enjoy the journey of defense and upgrade!
Upgrade your Fortress fighting alien monsters.
Updated on
Sep 14, 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, Personal info and 2 others
  • No data collected
    Learn more about how developers declare collection
  • Data is encrypted in transit
  • Data can’t be deleted

Ratings and reviews

5.58K reviews
Poovendran Baccus
January 18, 2025
Fun game :) it's a bit buggy when you perform ad-related activities (the game may freeze and you'll have to watch the ad again), but overall, it's a relaxed, level-up kind of game with enough challenging aspects to keep you engaged. The daily quests are sometimes impossible to achieve, sometimes because of the timezone, sometimes because you don't have the right "cards". The rewards also don't scale well. As you level up, you need to consume way more resources.
7 people found this review helpful
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Alex
August 8, 2023
Because they bugged me annoyingly at every single play to review. On top of that, the prices are crazy high. I mean 17 EUR for a monthly pass is just insane for such a light game. Final Fantasy XIV's subscription is less than that, and it's a full on MMO! There's also a huge wall in world 3, with some ridiculous kamikaze invisible enemies that shred you, and there's no way to mitigate them, since there's no detection. Too bad really, it's a fun game but there are too many issues with it.
67 people found this review helpful
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DD Game
August 15, 2023
Hi, to against invisible monster, you need to upgrade shield. when the monsters attack shield, the base has chances to attack monsters. Thank you!
Will Brashear
July 3, 2023
This game is a worse version of Idle Archer Defense RPG. It has twice the number of currencies (one you don't even know what it does). The graphics are worse. The game lies to you. If you finish a level, then you get say x4. It doesn't give x4. It shows you a number and your gold is equal to the number after what bonus you watch the ad for. Though technically it's showing the correct number, it be better if it just shows you the bonus gold you won and not how much you'll get as a total.
24 people found this review helpful
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What’s new

Fix bugs