Fortress Saga: Idle AFK RPG

Contains adsIn-app purchases
169K reviews
Content rating
Rated for 3+
1M+
Downloads
Content rating
Rated for 3+
Learn more
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About this game

Welcome to Fortress Saga, the ultimate Idle RPG where epic battle never stops! Ready for a legend AFK adventure? Battle for victory!
The dark war has begun! Upgrade your moving fortress, summon powerful hero units, master strategic skills, and build the ultimate castle layout.

Enjoy growth with advanced auto-battle & AFK features. Even while you are offline or sleeping, your idle hero, fortress, and rewards continue to grow 24/7. Say goodbye to mindless grinding and enjoy an effortless level up progression system designed for maximum fun. Explore dark dungeon vaults, engage in fierce combat, and witness how a simple recruit becomes an epic hero.
If you love idle rpg games with deep strategy, intense battle mechanics, and endless collection elements, Fortress Saga is your next obsession. Join the afk journey of Cor and Louis today, defeat every enemy, and write your own legends!

▶ Non-Stop Idle RPG Growth & AFK Rewards
Your hero and fortress grow stronger around the clock! This AFK RPG delivers continuous progress through an optimized auto battle system, automatic level up functions, and rewarding hero upgrade choices anytime, anywhere. Collect endless loot, gems, and gold even while you are offline. It’s the perfect idle game setup for players who want high-tier strategic growth without any stress. Start your legend afk arena showdown now and see how easy growth can be!

▶ Build, Upgrade, and Defend Your Fortress
Turn your moving base into an unbreakable, giant castle. Build unique defense facilities, upgrade your fortress parts, and unlock rare skills to repel endless waves of enemies. Match your battle strategy and playstyle by equipping powerful gear and tactical defense systems. This isn’t just a simple action game; it’s a true strategic test where your setup determines victory or defeat in the grand war.

▶ Collect Epic Hero & Strategic Summon System
Assembled the ultimate team of defenders, dealers, tanks, and support hero units. Summon, collect, and combine diverse warriors to unlock powerful team synergies and hidden abilities in this premium hero collection RPG. Enhance their combat attributes, upgrade their weapons, and prepare your hero for challenging boss battle stages. Create the perfect deck of slime and legend hero to dominate the battlefield.

▶ Action Packed Dungeon Raid & Intense Combat
Lead your defenders into mysterious dungeon realms filled with monsters, traps, and massive bosses. Every dungeon clear brings a fresh challenge, stronger enemy types, and more rewards for your hero team. Test your strategy in competitive PvP arena match, climb the ranks, and prove your strength. Every single combat encounter brings you one step closer to achieving total victory and building a true legend.

▶ Stunning Visuals & Vivid Character Chemistry
Enjoy beautifully animated fantasy hero designs inspired by classic art styles. Watch your favorite defenders come alive with dynamic animations, full voice acting, and eye-catching visual effects. The deep chemistry between characters and captivating storylines will keep you fully engaged in this epic fantasy world. Discover their unique skills and backstories as you explore this immersive rpg universe.

▶ Massive Collaborations & Epic Games Events
Take part in special seasonal events and legend crossover collaborations that bring endless excitement! Fortress Saga features iconic worlds and exclusive collaboration hero from global hits like Sonic the Hedgehog (Sega), One Punch Man, Working Cat (Shigoto Neko), Delicious in Dungeon, and the Three Kingdoms Challenge. Meet unique event characters like the idol Devil Pink, complete daily missions, and claim epic games rewards that you cannot find anywhere else. Every single update offers fresh gameplay modes, special dungeon raids, and rare loot drops.

Play this top-tier free idle RPG anywhere, anytime.
Download Fortress Saga now, conquer every dungeon, and lead your fantasy hero to ultimate victory in this epic idle rpg war!
Epic Idle RPG Fortress War! Defend the castle, upgrade hero & battle for victory
Updated on
Sep 29, 2026
Available on
Android, Windows*
*Powered by Intel® technology
Events & offers

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
  • No data collected
    Learn more about how developers declare collection
  • Data is encrypted in transit
  • You can request that data be deleted

Ratings and reviews

158K reviews
James West
February 16, 2026
I put this game off for a long time because I thought it was a run of the mill idle game. While it is very similar in the brain scratching territory of satisfying incremental upgrades, it has its own style that shines not because it does the reliable and old stuff well but also because it has its own flavor of the genre. Premium currency is abundant as are summons and upgrades which is great because you arent experiencing a need to buy to get ahead. its well done. and its fun.
30 people found this review helpful
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CookApps
February 17, 2026
Hello, this is 『Fortress Saga』. Your support and valuable feedback mean a lot to us! We’ll keep working to improve our service and deliver a game that brings you joy and satisfaction. We hope 『Fortress Saga』 continues to give you wonderful memories. Please feel free to share your thoughts anytime—we’re always listening. Thank you.
Landon Suttles
November 30, 2024
So far the game is actually not that bad but holy hell dude, Im not braindead the damn tutorial shouldnt last this long. It just keeps on keeps on keeps on forcing me to check stuff I dont have a care for at the moment. Just show the basics and let the players learn on their own from there. I'm trying to play the game not get forced into a new dungeon I unlock every single time.
65 people found this review helpful
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CookApps
December 21, 2024
Hello, 『Fortress Saga』. We sincerely apologize if your experience with us left a negative impression despite visiting with excitement. Your feedback has been shared for review and will be taken into consideration. We will strive to make 『Fortress Saga』 a better experience for everyone. Thank you.
チェシャー
September 18, 2026
For an old game, similar bugs are still occurring. Unable to proceed with Endless Roadrail even after killing all the enemies, the screen just stuck there but did not freeze or lag. Similar to summoning heroes, upgrading fortresses. I tap upgrade on anything and it's just stuck, the animations are still going but I can't tap anything else. And that always forced me to restart the game multiple times ... Sometimes I would get stuck on batch files download 0% on the main screen too
1 person found this review helpful
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CookApps
September 19, 2026
Hello, this is 『Fortress Saga』. Thank you for your valuable review! However, it’s difficult to verify the issue with the information in your review. Please contact us via Menu → Settings → Contact Us in the game with detailed info. We’ll do our best to verify and assist you promptly. Thank you.

What’s new

Update 2.1.15

- Minigame Event: Oct 1–15. Join the fun and explore 2 limited decorations on sale during the event.
- Fireworks Festival Login Event: Oct 8–22. Join the celebration and discover special festival packages.
- Fixed some Precision Part effects and Arena combat power display.
- Fixed blueprint collection resetting ongoing production in Machina Engineering.
- Added type filters to the dismantling window and fixed the sort indicator position.