Galaxy Defense: Fortress TD

Galaxy Defense: Fortress TD

Defend Planet, Beat Aliens!

8.9K ratings
1248 reviews
With Ads#46 in top-grossing Strategy
🎮 Games
🎈 Casual
🏰 Strategy
Free
In-App PurchasesWith Ads

Details

  • Released
  • Updated
  • February 1, 2025
  • June 29, 2026

Features

Galaxy Defense: Fortress TD screenshot #1 for iPhone
Galaxy Defense: Fortress TD screenshot #2 for iPhone
Galaxy Defense: Fortress TD screenshot #3 for iPhone
Galaxy Defense: Fortress TD screenshot #4 for iPhone
Galaxy Defense: Fortress TD screenshot #5 for iPhone
Galaxy Defense: Fortress TD screenshot #6 for iPhone
Galaxy Defense: Fortress TD screenshot #7 for iPhone
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About

Defend Earth from alien invaders in this idle tower defense game. Build diverse turrets, strategize your defense, and power up your character with unique skills and weapons. Collect resources and take on global challenges to protect the planet.

Build diverse turrets with unique skills
Strategize turret assembly based on enemy attributes
Power up character with chips and weapons
Choose roguelike upgrades
Collect abundant resources from battles
Join global expedition challenges
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What users say

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What's New in Galaxy Defense

0.18.0

June 29, 2026

1. New Event: Operation Dawn - Unlocks after 8 days of login for new players. - After successfully locking onto the insectoid homeworld coordinates through the Kronos Tracking, the United Earth Government has officially launched an interstellar expedition. - The Defense Department calls on guilds worldwide to construct the TK001 Quantum Shuttle and initiates the pre-expedition campaign: Operation Dawn. 2. New Rewards available in Operation Dawn 3. Added Community Rewards: Follow our official community channels to claim additional rewards.

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In-App Purchases

$9.99

Deep Space Expedition BP

Deep Space Expedition BP

Charts

Top Grossing

📈 46+1

Strategy games

This game rose +1 position in Strategy games chart.

Last updated on July 18, 2026.

Top Free

📈 59+1

Strategy games

This game rose +1 position in Strategy games chart.

Last updated on July 18, 2026.

Top Grossing

📈 59+1

Casual games

This game rose +1 position in Casual games chart.

Last updated on July 18, 2026.

Events

Read more about Smart Decryption

Smart Decryption

Smart Decryption has been activated!

Apr 4, 2025 May 5, 2025

User reviews

Cash grab

Typical game where the purpose is to generate revenue from the sale of booster packs that they make nearly required to succeed and enjoy. First round is rewarding then the second is neigh impossible without spending cash for boosts. No reward for skill, just grab cash.

Good but Impossible

I am a big Roguelike player. I play every one I can get my hands on, to at least try it out. I actually REALLY enjoy/like this game. It’s a great Roguelike/Roguelite. HOWEVER (& this is a MAJOR deal), I am STUCK. Once I reached regular Level 10 & Elite Level 5-6…? The game becomes P2W, & is just IMPOSSIBLE to beat. I mean, I have never SEEN a game jump this far, between levels. Uninstalling bc I refuse to put a lot of money into this game, as I just simply do not spend any real amount of money on any MOBILE games. I have GamePass on XBox with plenty of Rogues, on there to play. I don’t NEED this Game like that. Man, fix this difficulty issue or you’ll never get anyone to truly stick it out, in this game. I got to this point fairly quickly, in about 2-3 days of playing. But, over now been at a complete standstill & stuck for a WEEK. I just canNOT get any further in this game. So, it now does in the trash & I’ll never look back. Do not get this game, if you don’t plan on spending at LEAST $30-40 just to be able of truly play it. NO mobile game is worth that. Not a single one.
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Progression is not balanced

When progressing in the early parts of the game it goes smooth. Then comes level 15. It seems designed as a cash grab, forcing you to pay to get good enough damage to deal with the shields of the units. You can beat the boss but still lose the round due to unsustainable damage. The RNG is just not in the favour of the player. It’s rigged to make you pay to win. Not worth it in the long run. Don’t play if you are free play.
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Potential to be great

This game is very much so P2W and expensive if you do plan on spending money. Still a fun game though.

Do not spend money.

The current events are primarily just cash shops dressed up as events. They are literally pay cash to roll dice and see if you get something useful. No gameplay whatsoever.

Worse, for the current “event” which was just “pay cash for Plinko rewards,” a lot of accounts like my own got more from paying than we were supposed to. Since it is an entirely new event and the rewards were not that much better than a previous event, many of us didn’t notice. (Some people apparently exploited this to max their accounts out. I do not know how; I was not one of them. The rewards I got weren’t much better than the last event like this.)

The devs responded by resetting our accounts… and keeping the money. $150 in my case. I ONLY spent the money because of the quality of the rewards. I asked to either be refunded the money or have my account restored. They did neither, and instead gave me ~1/8 of what I paid for rather than acknowledging that the mistake was theirs and simply refunding the money.

I am #1 in my seed currently and spend on every single event, every week. I am no longer spending, and several other whales I know aren’t either. It’s unfortunate, but the “events” being released are just cash shops for gambling for good rewards. I strongly discourage spending.

They are also claiming to have Zerg and Zerg carapaces etc in the game now which is an odd decision since they are not owned by Blizzard, this this does not appear to be legal.
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Developer apps

User experience

🐞

Reported Bugs

2 issues

App crashes on certain devices

Bug

Connectivity issues causing lost progress

Bug

Requested Features

3 requests

Improved graphics and animations

Feature

More varied enemy types

Feature

Rebalancing of difficulty levels

Feature

FAQ

What is Galaxy Defense: Fortress TD?

Galaxy Defense: Fortress TD is an idle tower defense game where players defend Earth from alien invaders. It features strategic turret building, character upgrades, and resource collection to progress through challenges.

What are the key features of this game?

Key features include building diverse turrets with unique skills, strategizing turret assembly against different enemy types, powering up your character with chips and weapons, choosing roguelike upgrades, collecting abundant resources, and participating in global expedition challenges.

How is the game monetized?

The game is free to download and play, but it offers in-app purchases for items and upgrades. It also includes advertisements.

What platforms is Galaxy Defense: Fortress TD available on?

Based on the provided information, this is a mobile application. The specific platforms (iOS, Android) are not explicitly stated but are implied by the context of a mobile app.

What are common use cases for this game?

This game is ideal for players looking for a strategic yet accessible tower defense experience that can be played in short bursts due to its idle mechanics. It's also suited for those who enjoy progression systems, character customization, and cooperative play in defending against a common enemy.