Fortress Merge: Puzzle Defense

In-app purchases
4.4
14.1K reviews
500K+
Downloads
Content rating
Everyone 10+
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About this game

Fortress Merge: Puzzle Defense is your next addictive obsession in the world of strategy games! Step into a thrilling realm where every puzzle you solve fortifies your castle defense. Defend your city, merge your way to power, and conquer endless enemies in this action-packed puzzle defense experience. In Fortress Merge: Puzzle Defense, the key to survival lies in how you merge, upgrade, and defend. Welcome to the ultimate test of tactics, timing, and tenacity. If you're a fan of zombie tower defense, roguelike challenges, and strategic gameplay — Fortress Merge: Puzzle Defense was made for you!

Immerse yourself in a world where your fortress is constantly under siege by waves of terrifying zombies. Only the sharpest minds can master the art of merging and stand strong in this apocalyptic realm. With influences from top strategy war games, this title combines the tactical depth of battle strategy games with the casual appeal of puzzle mechanics and the intensity of castle defense.

Prepare to rise as the ultimate guardian of your land. With each wave, your fort becomes a symbol of resistance. This game amps up the stakes with intense roguelike gameplay that ensures no two runs are the same. Plan your upgrades, merge powerful facilities, and choose the right skills to build an impenetrable fortress. Whether you're a seasoned tactician or new to tower games, the fast-paced, ever-changing combat will keep you on your toes.

Fight off zombies in epic tower defense showdowns as you make each choice count. Will you build your strategy around devastating traps, elite knight games units, or brute-force turrets? How will you respond when your base is under siege with no escape? With every wave, you'll unlock new content, test your tactics, and define your legend.

From engaging casual sessions to hardcore strategy games marathons, this game caters to all playstyles. Challenge yourself with tough decisions and satisfying victories that define great defense games.

Features:
🔥 Merge & Upgrade: Combine different types of buildings to create powerful structures and enhance your defenses.

🧠 Strategic Gameplay: Think ahead, plan your moves carefully, and use your resources wisely to outsmart your enemies.

⚔️ Wave After Wave: Defend your home from increasingly difficult waves of enemies — don’t let them surround you!

🧩 Exciting Puzzle Mechanics: Solve puzzles and face thrilling challenges while keeping your defense strong.

Stunning Graphics & Engaging Action: Immerse yourself in beautifully designed environments with smooth, fast-paced gameplay.

Only a true guardian can withstand the chaos threatening your fortress. In this war-torn world, where legions clash and zombies multiply, your fort is your last hope. Rally your legions, master the art of the puzzle, and fight for survival. Your every move in this castle defense game determines whether you rise as a legend or fall into ruin.

This is not just another zombie defense game — this is where puzzle, combat, and tactics collide. Download now and become the legend who defends the last stronghold in a world at war. Prove your worth in one of the most thrilling roguelike and battle strategy games of our time.

Merge. Defend. Conquer. Only in Fortress Merge: Puzzle Defense.
Updated on
14 Aug 2025

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, Financial info and 2 others
This app may collect these data types
Location, Financial info and 3 others
Data isn’t encrypted
Data can’t be deleted

Ratings and reviews

4.4
13.4K reviews
eLyk
15 August 2025
many ads or purchase to remove. 2nd hero is an idiot, can't keep her distance& attack w/arrows. forgets what she's doing and walks right by her border into the enemy w/o attacking and is slaughtered. this new "boss attacking" notification on screen at wave 8/13 is annoying. don't need it to pop up every 2 seconds. now it is blocking the skill page and froze. if I exit now I'll lose the progress I made and the buildings I've just set up Every wave 3 is stronger than your army unless u watch ads
4 people found this review helpful
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TapNation
18 August 2025
Thank you very much for your review concerning our game. We are always collecting user feedback and emails that we can apply with updates.
Ripple Effect MLP
23 July 2025
It's a good game overall. Initial layouts keep levels from being repetitive, so it gives your brain more to think about what to place where. My only real negative is that the game sometimes crashes and makes me replay a level from Wave 1; if I have to do that when I was at Wave 7 or higher, it's disheartening.
25 people found this review helpful
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TapNation
23 July 2025
Dear Ripple, please check out the new version of the game, released by the end of this week, you might like the easier balancing, new content and consider a few more stars, it means a lot to us :)
Brandon Calloway
2 August 2025
Ads Make it crash roughly 75% of the time. I am very close to deleting this app. If I click on a ad reward the ads almost always crash the game. This causes me to have to reload it. Anything I spent my in-game currency on is then lost, and my currency is also lost. Not to mention that because the ad did not finish i don't receive the reward. It makes the game practically unplayable.
13 people found this review helpful
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What's new

- Upgraded menus
- New levels balancing
- Shop reworked
- Prices in local currency
- Bugs fixed (skill tree, sounds, heroes, buildings)