Steam

Irsen

Also known as Irsen, i, irsen

IRSEN is a turn-based roguelite where your character fights alone against coordinated enemy squads. Build your hero through a gene system, reshape your abilities mid-run, and endure the growing pressure of corruption.

Last update

4 Aug 2026

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Latest update

EventPublished 23d ago

v0.48Devblog #24. New Demo Version v0.48

Hello everyone. On August 1, I plan to release a new demo version of IRSEN on Steam. Two months have passed since the previous major update, and during that time hundreds of changes have accumulated across the game. I h…

12 changesMapsUI/audioRead more

Update history

Browse past updates and patch notes for this game.

12 updates

July 2026
Devblog #23. The Demo and Limitations.Steam post image Hello everyone. Today I want to take a closer look at the game’s demo and think about what should remain available there and what should be reserved for the full version. The current IRSEN demo already…Announcement8 changesGameplayBalance24 Jul 2026
Devblog #22. Character Origins.Steam post image Hello everyone. Today I would like to talk about the character origin system that will be added in the next version, 0.48. In IRSEN, the character does not have a class or any fixed development tree. Th…Announcement14 changesFixMaps17 Jul 2026
Devblog #21. Processing Station.Hello everyone. Today I want to talk about an intermediate layer of the game that exists between dungeon floor runs. This is the Processing Station. Usually in RPG games, the player has some kind of basic hub where they…Announcement11 changesGameplayBalance10 Jul 2026
Devblog #20. Gene Extraction.Hello everyone. Today I want to talk about the gene extraction process in the current version of the game. The first version of loot in the game worked like regular RPG loot. After killing a group of enemies, each defea…Event14 changesBalanceGameplay03 Jul 2026
June 2026
Devblog #19. Visual Update: Genes, Mutations, and Interface.Hello everyone. In today’s devblog, I would like to step away from describing the internal systems of the game for a moment and talk about the visual update I am preparing for the next demo version on Steam. The first v…Announcement17 changesGameplayMaps26 Jun 2026
Devblog #18. Implants in Combat.Hello everyone. In previous devblogs, I talked a lot about genes, chains, skill properties, and the Gene Lab. But the character build in IRSEN is not made only from genes. There is another layer of combat support - impl…Announcement13 changesBalanceGameplay18 Jun 2026
Devblog #17. Gene Lab: Customizing Skill Properties.Hello everyone. In today’s devblog, I will finish describing how the Gene Lab works. In previous devblogs, I already covered gene development in the lab: fusion for increasing allele tiers, as well as operations involvi…Announcement13 changesGameplayMaps12 Jun 2026
Devblog #16. Bio Scanner and Field Dosimeter.Steam post image Hello everyone. This week, a new public version of Irsen was released on Steam. The demo is now available to download and try. In the previous devblog, I tried to describe the main updates included in t…Announcement10 changesGameplayUI/audio05 Jun 2026
May 2026
Devblog #15. What Is Changing in Public Version 0.451Hello everyone. Quite some time has passed since the release of the Irsen 0.43 demo. Over the past weeks, I gathered the new work I had done and prepared the next public version: 0.451. In today’s devblog, I want to go…Announcementv0.45120 changesGameplayUI/audio29 May 2026
Devblog #14. Gene Lab: Gene Finalization.Hello everyone. I continue covering operations involving single genes in the Gene Lab. In the previous devblog, I talked about absorption - a way to turn an extra gene into a permanent bonus. Today I will cover another…Announcement6 changesMapsGameplay22 May 2026
Devblog #13. Gene Lab: Gene Consumption.Hello everyone. I continue covering gene operations in the Gene Lab. In one of the previous devblogs, I already explained the basic procedures involving genes. Now I want to look at operations involving a single gene. D…Announcement12 changesMapsGameplay15 May 2026

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v0.48Devblog #24. New Demo Version v0.48

July 2026

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May 2026