
Screenshots

Watch trailer on Steam ↗IDUN Prologue - Frontline Survival
IDUN Interactive · Published by Surefire.Games · Official site ↗
Very Positive — 89% positive (87 reviews)
Last updated 28 Sept 2026
Step into the arena with IDUN: Prologue, a thrilling slice of our full-length defense RTS where real-time strategy meets rogue-lite chaos. Fight your way through unique mission objectives with overwhelming swarms of enemies.
Adventure, Indie, Simulation, Free To Play, Strategy · 2025 · More free games
Embark on relentless missions where strategy meets rogue-like unpredictability. In IDUN Prologue - Frontline Survival, navigate through chaotic swarms of enemies and unique objectives, all while keeping your guard up in this thrilling adventure and strategy experience.
About this game
IDUN: Prologue is a single-player action RTS with a story campaign. The prologue lets you try a portion of the main game with only a limited number of turrets, tools, and heroes.
Step into the arena with IDUN: Prologue, a thrilling slice of our full-length defense RTS where real-time strategy meets rogue-lite chaos. Get a sneak peek at the intense arena mode, where you’ll face overwhelming enemy swarms with a diverse arsenal of turrets, tools, and heroes—just a taste of the full IDUN game that awaits.
Each run throws you into procedurally generated arenas filled with unpredictable challenges, unique mission objectives, and an ever-evolving environment. Adapt quickly as massive hordes flood the screen, and leverage destructible terrain to your advantage. With branching paths, powerful upgrades, and varied mission modifiers, every playthrough delivers a fresh and dynamic experience.
Real-time Tactical Flexibility
Break free from traditional tower defense gameplay—deploy and reposition your units freely, taking full command of the battlefield.
Dynamic Battlefield
Experience ever-changing missions as the battle against relentless enemy swarms reshapes the terrain. Destruction and enemy remains create new challenges and opportunities, demanding constant tactical adaptation.
Play Your Way: Full Control Anywhere
Enjoy the freedom to play IDUN however you like! The game offers seamless support for Mouse & Keyboard, Gamepad, Touch, and is now fully optimized for Steam Deck.
Take advantage of extensive customization options for both visuals and controls, ensuring the perfect gameplay experience tailored to your preferences.
System Requirements
Will my PC run this? →Minimum
- OS *: Windows 7 (SP1+) 64-bit
- Processor: Intel Core i5-10310U or AMD Ryzen 7 3700U
- Memory: 4 GB RAM
- Graphics: Intel UHD 620 or AMD Radeon Vega 3
- DirectX: Version 10
- Storage: 500 MB available space
Recommended
- OS: Windows 10/11 64-bit
- Processor: Intel Core i5-9400 or AMD Ryzen 5 3600
- Memory: 8 GB RAM
- Graphics: NVIDIA GTX 1660 or AMD Radeon RX 580
- DirectX: Version 11
- Storage: 1 GB available space
Supported Languages
*languages with full audio support
Latest news
Patch NotesOfficial
IDUN Major Update & Steam Spring Sale – Get 15% Off!
{STEAM_CLAN_IMAGE}/43358829/c0fe8eaee853ed7945f09275edd262dd7e3aa7db.gif IDUN hits Build 100 with a massive update! A new cinematic wraps up the story, and Ro-Ro joins as a deployable hero after finishing the campaign. Extreme Difficulty & Epic Raids unlocks for those who seek the ultimate challenge. Rock Piercer is now a fully implemented hero! The game is now fully localized in Russian and Korean, big thanks to everyone who helped out! We're currently part of the Steam Spring Sale! IDUN is now available at a 15% discount, so if you’ve enjoyed Prologue, now’s the perfect time to jump into the full experience! Ready for the next challenge? Upgrade from Prologue to the full game now and experience everything IDUN has to offer! https://store.steampowered.com/app/2186360/IDUN/ Added: New cinematic when finishing the last mission (Drill or Die). {STEAM_CLAN_IMAGE}/43358829/fadd60e05dabdf28fa69634df183ac5bf32b921b.jpg Ro-Ro becomes a deployable hero after completing the story campaign. Play Drill or Die to unlock! {STEAM_CLAN_IMAGE}/43358829/2c6648c61283ed9f6b01a42b1f3e0ab9a28e5ddf.gif Full localization in Russian and Korean. {STEAM_CLAN_IMAGE}/43358829/6d5ec5401f13adf58fb7a87cc8767a52bd83fcad.jpg Extreme Difficulty unlocks after finishing the story campaign. Survive Deep Drill for 10 minutes, mine 95% with the Excavator, and collect 10 meteors with the Mech. Epic-length Raids unlock after the story campaign. Almost twice as long as Long Raids! {STEAM_CLAN_IMAGE}/43358829/a7c507b908a6db2d5c737e069342156d036ce724.png Rock Piercer is now an upgradeable hero with deployable abilities. Play Convoy to unlock. {STEAM_CLAN_IMAGE}/43358829/8fc8621756c75a0df83614bbcbb2fdc55c2337b1.gif This is a huge milestone for IDUN, and it's all thanks to you! Keep sharing your feedback, and let me know what you think of the new heroes and epic challenges!Read full article on Community Announcements (Henry Zeng)Patch NotesOfficial
Patch Notes: Build 0.91 "Re-Rolls & Bans"
Take control of your rewards with the new Re-roll and Ban systems, improved mission balancing, and significant fixes based on player feedback. Explore a more polished experience with better visual and enhanced gameplay options. Added Pink cursor option. Screen Resolution dropdown in Settings. Slow Motion (Reduced Game Speed) toggle can now be bound to a key in Settings. Reward Re-roll: Refresh your options with a limited number of re-rolls per mission. {STEAM_CLAN_IMAGE}/45115909/47c4ed32a6ad26ac64df861e9a85f019b82a72e5.jpg Reward Ban: Remove a reward option for the rest of the mission with a limited number of bans per mission. {STEAM_CLAN_IMAGE}/45115909/a0b31be6ad0506974b7714b9ced146459b2f3ac9.jpg Pre-Lightning Strike warning effect. {STEAM_CLAN_IMAGE}/45115909/e736507010d9da7a640208f011c318b5ac7fcffa.gif Balance Walls start count increased from 1 to 3. Deep Drill minimum distance from edges increased from 10 to 20 meters. Deep Drill Smallest mission smallest size increased from 60 to 70. Nuke On Wheels trigger distance increased from 8 to 8.5. Spear Spitters stand closer to targets (distance reduced from 400 to 300). Mech Mission Meteor collection reward distance increased from 10 to 12. Lightning Strike won't hit the same spot twice in a row. Excavator changes: Epli reward from mining mountains increased by 33%. Health increased from 10000 to 12000 Changes Analytics data collection is now off by default. Time between dormant spawn wave warnings increased from 30 to 40 seconds. Holding Shift with Traditional controls always triggers box selection (no accidental dragging). Turret Tooltip now displays Aim Speed (Rotation Rate). Selection Modifier input is now rebindable (default: Shift). Control Group input is now rebindable (default: CTRL). Press CTRL + # to create control groups. Updated Raid information screenshots. Mech Proximity Mine on step no longer exponential. No Monster Tunnel openings on small maps. Fixes Mech Collectibles can't be moved with dragged tur...Read full article on Community Announcements (IDUN Interactive)Patch NotesOfficial
Special Update for Steam RTS Fest
Hello to all our Prologue players! We’ve just released an update for the Prologue build, which includes some important fixes and optimizations. We've also made adjustments to balance and localization to improve your experience. {STEAM_CLAN_IMAGE}/45115909/ce41d56864da7477d57f2a3e4f4f7ca7707f4c02.jpg More excitingly, our full and complete version of the game is officially live! We invite you to dive into the expanded content and enjoy the full IDUN experience! Additionally, we’re proud to be part of the Steam RTS Fest, so be sure to check it out and have fun! https://store.steampowered.com/app/2186360/IDUN/ Happy gaming, The IDUN TeamRead full article on Community Announcements (Surefire.Games)AnnouncementsOfficial
IDUN has 🚀Launched, Play Now!
Hi all! I’m absolutely thrilled to share that IDUN has officially launched and is ready to play! IDUN is a single-player defense focused RTS with a story campaign and rogue-lite elements. Available now on Windows, MacOS, Linux, and SteamDeck for $14.99 USD! For the next two weeks, you can grab it at a 10% launch discount! Pick it up and let us know what you think. Your continued feedback will shape the future of the game, so please share your thoughts and ideas with us! https://store.steampowered.com/app/2186360 Creating IDUN has been an incredible journey. This game is a passion project brought to life by an amazing team of talented people from around the globe. I love making games so much I forget to breathe, and my 18 years in the industry have only deepened that passion. Talking with the community has been a highlight of this process, and your feedback has been instrumental in making IDUN the game it is today, so thank you! The Prologue was a crazy idea and a wild ride, but your reception blew us away! It's still being updated and supported, so I would highly recommend you to give it a spin if you haven't already. IDUN is also part of the Steam RTS Fest, a perfect chance to feel it's unique mix of defense-focused RTS and rogue-lite gameplay. My love for the RTS genre knows no bounds, which I hope you can feel when you play IDUN. What’s Next? The launch is only the beginning. We’re committed to keeping IDUN fresh with regular updates and exciting new content based on your feedback. It’s been an unforgettable journey creating this game, and I’m so excited for you to play what we’ve made! Cheers, Gustav ("The Developer") & the IDUN TeamRead full article on Community Announcements (Henry Zeng)AnnouncementsOfficial
Ready to Roll? The IDUN Launch FAQ!
IDUN is officially launching on January 20th, and we’ve prepared an FAQ to help answer any questions you might have. Thank you for your incredible support—we couldn’t have done this without you! https://store.steampowered.com/app/2186360/IDUN/ Q: What is the exact launch time? A: January 20th at 9:00 AM PST. Q: Will it launch in Early Access? A: No, the full game will be available at launch! Q: What’s the price? Will there be a launch discount? A: The game is priced at $14.99 and will have a 10% launch discount. Q: Can I stream the game after it’s released? A: Absolutely! We encourage you to stream and share all the content freely. Q: What modes are included in the game? A: The game features Campaign Story Mode and a Roguelike Raid Mode. Q: Will the game receive updates after launch? A: Yes, we will continue to support the game with updates after launch, including balance adjustments, bug fixes, and more. We’re also looking forward to hearing player feedback to inspire new content in future updates. Q: How can I provide feedback or suggestions? A: In-game feedback window Discord: https://discord.com/invite/KRXDNETCnh Steam Community I can't believe it—our game is finally about to officially launch! Let's look forward to the arrival of the full build together! We are incredibly grateful for all the support from our players and we couldn’t have done it without you! Best wishes!Read full article on Community Announcements (Surefire.Games)






