Idun
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About Idun
Idun is a defense RTS that combines real-time strategy and tactical tower defense in a single-player story campaign. You command weapons and units against relentless alien swarms, adapting your defenses as missions unfold.
Missions and defenses
Missions include defending a collection base, escorting nuclear vehicles and protecting mining carts. To stop waves of extraterrestrial enemies, you can deploy tanks, blade-spinning fans, flesh-melting turrets and barriers. You can also use repositionable drag-and-drop turrets and point-and-shoot orbital cannons, moving units freely across the battlefield.
A changing battlefield
Combat reshapes the terrain, while destruction and enemy remains create new challenges and opportunities. You must adapt your tactics as conditions change. Rogue-lite elements bring fresh challenges and unpredictable encounters to each run.
Tech progression
A tech tree lets you upgrade your space station and unlock turrets, elite troops and tactical tools to withstand the attacks.
Story campaign
The fully voiced story follows the crew as they face attacks that lead to unexpected and game-changing developments.
Frequently asked questions
The best price for Idun is $10.95 at Difmark. That is 26% less than on Steam, where it costs $14.99. 3 shops have an offer that activates in your country.
Some are. This page only shows offers that activate in your country; offers for other regions, or with no stated region, are left out. To see the offers for another country, change your country at the top of the page.
Every key we list activates on Steam. Redeem the key there and Idun stays in your library for good.
Yes, with a small risk. Publishers create keys to sell in other shops, which is why a key can cost less than in the official store, and once you activate it the game is yours to keep, just like a store purchase. On average 1–2% of keys fail, so check the shop's buyer protection before you buy: the official store does not refund keys bought elsewhere.
The minimum requirements for Idun are: Windows 7, Intel UHD Graphics 620, Intel Core i5-10310U, 4 GB RAM, 1 GB storage. It also runs on macOS. The recommended specs are in the System requirements section.
No. Idun is a single-player game.
Yes. Valve rates Idun as Verified on the Steam Deck: it runs well out of the box.
Buy Idun 26% cheaper than on Steam.
Idun is available for 26% less in shops such as Difmark or Wyrel.
Steam lets publishers create keys to sell in other shops. Once you activate a key, the game is yours to keep, just like a store purchase.
Disclaimer: CD keys have an inherent 1–2% average failure rate. Check the shop terms for buyer protection info. Steam offers no buyer protection for keys bought in other shops and doesn't refund them.
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