Fortress Saga: Idle AFK RPG

Contains adsIn-app purchases
169K reviews
Content rating
USK: Ages 12+
1M+
Downloads
Content rating
USK: Ages 12+
Comic Violence, Sexual Innuendo
Users Interact, In-Game Purchases (Includes Random Items)
Learn more
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image

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
Featured stories

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
Game Tester
April 6, 2026
There is some fun in chasing upgrades, but I would advice all to be wary of 'bait and switch' microtransaction advertisement. I tried to buy a certain hero and they didnt give me. They said they sent me some ingame currency saying - oh, the fineprint says something other than what is in advertisement. I shall consider taking down this feedback only if I get back my money. Be wary of spending any money!!
5 people found this review helpful
Did you find this helpful?
CookApps
April 6, 2026
Hello, 『Fortress Saga』. We’re sorry we couldn’t provide a satisfying experience despite your interest. Please note that payment issues can’t be verified through store reviews. Contact us via Menu → Settings → Contact Us in the game. Include product name, purchase date, order number, and details so we can assist you quickly. Thank you.
Babi Vamp
February 21, 2025
It's a very cute game, love the idea and output but there are some issues i find extremely annoying for an IDLE game: -monster kills only get counted when online. With quests where you're supposed to kill over thousands, that seems a bit unfair. Either allow a portion to be counted or increase spawn rate -befriending is extremely annoying. You have to manually type in Players in hopes anyone accepts, instead of just listing a few you can click trough to share points around
Did you find this helpful?
CookApps
February 25, 2025
Hello, 『Fortress Saga』. We will carefully review your input and strive to make improvements that provide even more enjoyable experiences in the future. We are committed to delivering even more satisfying services and will continue to work hard to meet your expectations. Thank you.
Tim Hildebrandt
October 16, 2023
Overloaded with mechanics, but still fun. You can, but don't have to spend money, since earning premium currency is quite fast and fair to earn. Early on, you shouldn't take the 'AFK' part too seriously, cause in the first 6h or so, I've been pressing stuff without a break. The only real critique I have, is, that if you decide to spend money, the pricing clearly targets whales - which in this day and age is fair for a free game, but still.
1 person found this review helpful
Did you find this helpful?
CookApps
November 1, 2023
Greetings from CookApps! We're glad to hear that you're enjoying our game! We hope you stick around in the future for more fun! If you have any questions about the game, please let us know through our Customer Service. 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.
Content rating
USK: Ages 12+
Comic Violence, Sexual Innuendo
Users Interact, In-Game Purchases (Includes Random Items)
Learn more

App support

About the developer
(주)쿡앱스
shpark@cookapps.com
분당구 대왕판교로 660, 1비동 801호(삼평동, 유스페이스) 분당구, 성남시, 경기도 13494 South Korea
+82 70-8806-6042

More by CookApps

Similar games